Supports Sourcery CodeBench Mips toolchain directories tree.

Sourcery CodeBench and modern FSF Mips toolchains require a bit more
complicated algorithm to calculate headers, libraries and sysroot paths
than implemented by Clang driver now. The main problem is that all these
paths depend on a set of command line arguments additionally to a target
triple value. For example, let $TC is a toolchain installation directory.
If we compile big-endian 32-bit mips code, crtbegin.o is in the
$TC/lib/gcc/mips-linux-gnu/4.7.2 folder and the toolchain's linker requires
--sysroot=$TC/mips-linux-gnu/libc argument. If we compile little-endian
32-bit soft-float mips code, crtbegin.o is in the
$TC/lib/gcc/mips-linux-gnu/4.7.2/soft-float/el folder and the toolchain's
linker requires --sysroot=$TC/mips-linux-gnu/libc/soft-float/el argument.

1. Calculate MultiarchSuffix using all necessary command line options and
   use this MultiarchSuffix to detect crtbegin.o location in the
   GCCInstallationDetector::ScanLibDirForGCCTriple() routine.
2. If a user does not provide --sysroot argument to the driver explicitly,
   calculate new sysroot value based on command line options. Then use this
   calculated sysroot path:
   a. To populate a file search paths list in the Linux::Linux() constructor.
   b. To find Mips toolchain specific include headers directories
      in the Linux::AddClangSystemIncludeArgs() routine.
   c. To provide -–sysroot argument for a linker.

Note:
- The FSF's tree slightly differs (folder names) and is not supported
  yet.
- New addExternCSystemIncludeIfExits() routine is a temporary solution.
  I plan to move path existence check to the addExternCSystemInclude()
  routine by a separate commit.

The patch reviewed by Rafael Espindola.
http://llvm-reviews.chandlerc.com/D644

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179934 91177308-0d34-0410-b5e6-96231b3b80d8

118 files changed, 581 insertions, 0 deletions

diff --git a/test/Driver/Inputs/mips_cs_tree/bin/.keep b/test/Driver/Inputs/mips_cs_tree/bin/.keep
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/64/crtbegin.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/64/crtbegin.o
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+++ b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/64/crtbegin.o
diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/64/crtend.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/64/crtend.o
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+++ b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/64/crtend.o
diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/crtbegin.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/crtbegin.o
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+++ b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/crtbegin.o
diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/crtend.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/crtend.o
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+++ b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/crtend.o
diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/el/64/crtbegin.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/el/64/crtbegin.o
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+++ b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/el/64/crtbegin.o
diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/el/64/crtend.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/el/64/crtend.o
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+++ b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/el/64/crtend.o
diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/el/crtbegin.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/el/crtbegin.o
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+++ b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/el/crtbegin.o
diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/el/crtend.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/el/crtend.o
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/64/.keep b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/64/.keep
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/el/64/.keep b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/el/64/.keep
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/micromips/el/.keep b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/micromips/el/.keep
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/micromips/soft-float/el/.keep b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/micromips/soft-float/el/.keep
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/mips16/el/.keep b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/mips16/el/.keep
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/mips16/soft-float/el/.keep b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/mips16/soft-float/el/.keep
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/soft-float/el/64/.keep b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include-fixed/soft-float/el/64/.keep
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include/.keep b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/include/.keep
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/crtbegin.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/crtbegin.o
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/crtend.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/crtend.o
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/el/crtbegin.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/el/crtbegin.o
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/el/crtend.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/el/crtend.o
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/soft-float/crtbegin.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/soft-float/crtbegin.o
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/soft-float/crtend.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/soft-float/crtend.o
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/soft-float/el/crtbegin.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/micromips/soft-float/el/crtbegin.o
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/mips16/crtbegin.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/mips16/crtbegin.o
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/mips16/crtend.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/mips16/crtend.o
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/mips16/el/crtbegin.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/mips16/el/crtbegin.o
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/mips16/el/crtend.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/mips16/el/crtend.o
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diff --git a/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/mips16/soft-float/crtbegin.o b/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/mips16/soft-float/crtbegin.o
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--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/lib/.keep
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/lib64/.keep b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/lib64/.keep
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/lib64/.keep
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib/crt1.o b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib/crt1.o
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib/crt1.o
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib/crti.o b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib/crti.o
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib/crti.o
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib/crtn.o b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib/crtn.o
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib/crtn.o
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib64/crt1.o b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib64/crt1.o
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib64/crt1.o
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib64/crti.o b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib64/crti.o
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib64/crti.o
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib64/crtn.o b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib64/crtn.o
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/soft-float/usr/lib64/crtn.o
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/include/.keep b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/include/.keep
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/include/.keep
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib/crt1.o b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib/crt1.o
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib/crt1.o
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib/crti.o b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib/crti.o
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib/crti.o
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib/crtn.o b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib/crtn.o
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib/crtn.o
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib64/crt1.o b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib64/crt1.o
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib64/crt1.o
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib64/crti.o b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib64/crti.o
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib64/crti.o
diff --git a/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib64/crtn.o b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib64/crtn.o
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/Driver/Inputs/mips_cs_tree/mips-linux-gnu/libc/usr/lib64/crtn.o
diff --git a/test/Driver/mips-cs-header-search.cpp b/test/Driver/mips-cs-header-search.cpp
new file mode 100644
index 0000000000..cb15edd554
--- /dev/null
+++ b/test/Driver/mips-cs-header-search.cpp
@@ -0,0 +1,291 @@
+// REQUIRES: mips-registered-target
+//
+// Check frontend invocations on Mentor Graphics MIPS toolchain.
+//
+// = Big-endian, hard float
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mips-linux-gnu \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-HF-32 %s
+// CHECK-BE-HF-32: "-internal-isystem"
+// CHECK-BE-HF-32: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-BE-HF-32: "-internal-isystem"
+// CHECK-BE-HF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu"
+// CHECK-BE-HF-32: "-internal-isystem"
+// CHECK-BE-HF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-BE-HF-32: "-internal-externc-isystem"
+// CHECK-BE-HF-32: "[[TC]]/include"
+// CHECK-BE-HF-32: "-internal-externc-isystem"
+// CHECK-BE-HF-32: "[[TC]]/include-fixed"
+// CHECK-BE-HF-32: "-internal-externc-isystem"
+// CHECK-BE-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Big-endian, hard float, mips16
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mips-linux-gnu -mips16 \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-HF-16 %s
+// CHECK-BE-HF-16: "-internal-isystem"
+// CHECK-BE-HF-16: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-BE-HF-16: "-internal-isystem"
+// CHECK-BE-HF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/mips16"
+// CHECK-BE-HF-16: "-internal-isystem"
+// CHECK-BE-HF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-BE-HF-16: "-internal-externc-isystem"
+// CHECK-BE-HF-16: "[[TC]]/include"
+// CHECK-BE-HF-16: "-internal-externc-isystem"
+// CHECK-BE-HF-16: "[[TC]]/include-fixed/mips16"
+// CHECK-BE-HF-16: "-internal-externc-isystem"
+// CHECK-BE-HF-16: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Big-endian, hard float, micromips
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mips-linux-gnu -mmicromips \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-HF-MICRO %s
+// CHECK-BE-HF-MICRO: "-internal-isystem"
+// CHECK-BE-HF-MICRO: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-BE-HF-MICRO: "-internal-isystem"
+// CHECK-BE-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/micromips"
+// CHECK-BE-HF-MICRO: "-internal-isystem"
+// CHECK-BE-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-BE-HF-MICRO: "-internal-externc-isystem"
+// CHECK-BE-HF-MICRO: "[[TC]]/include"
+// CHECK-BE-HF-MICRO: "-internal-externc-isystem"
+// CHECK-BE-HF-MICRO: "[[TC]]/include-fixed/micromips"
+// CHECK-BE-HF-MICRO: "-internal-externc-isystem"
+// CHECK-BE-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Big-endian, soft float
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mips-linux-gnu -msoft-float \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-SF-32 %s
+// CHECK-BE-SF-32: "-internal-isystem"
+// CHECK-BE-SF-32: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-BE-SF-32: "-internal-isystem"
+// CHECK-BE-SF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/soft-float"
+// CHECK-BE-SF-32: "-internal-isystem"
+// CHECK-BE-SF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-BE-SF-32: "-internal-externc-isystem"
+// CHECK-BE-SF-32: "[[TC]]/include"
+// CHECK-BE-SF-32: "-internal-externc-isystem"
+// CHECK-BE-SF-32: "[[TC]]/include-fixed/soft-float"
+// CHECK-BE-SF-32: "-internal-externc-isystem"
+// CHECK-BE-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Big-endian, soft float, mips16
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mips-linux-gnu -msoft-float -mips16 \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-SF-16 %s
+// CHECK-BE-SF-16: "-internal-isystem"
+// CHECK-BE-SF-16: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-BE-SF-16: "-internal-isystem"
+// CHECK-BE-SF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/mips16/soft-float"
+// CHECK-BE-SF-16: "-internal-isystem"
+// CHECK-BE-SF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-BE-SF-16: "-internal-externc-isystem"
+// CHECK-BE-SF-16: "[[TC]]/include"
+// CHECK-BE-SF-16: "-internal-externc-isystem"
+// CHECK-BE-SF-16: "[[TC]]/include-fixed/mips16/soft-float"
+// CHECK-BE-SF-16: "-internal-externc-isystem"
+// CHECK-BE-SF-16: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Big-endian, soft float, micromips
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mips-linux-gnu -msoft-float -mmicromips \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-SF-MICRO %s
+// CHECK-BE-SF-MICRO: "-internal-isystem"
+// CHECK-BE-SF-MICRO: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-BE-SF-MICRO: "-internal-isystem"
+// CHECK-BE-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/micromips/soft-float"
+// CHECK-BE-SF-MICRO: "-internal-isystem"
+// CHECK-BE-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-BE-SF-MICRO: "-internal-externc-isystem"
+// CHECK-BE-SF-MICRO: "[[TC]]/include"
+// CHECK-BE-SF-MICRO: "-internal-externc-isystem"
+// CHECK-BE-SF-MICRO: "[[TC]]/include-fixed/micromips/soft-float"
+// CHECK-BE-SF-MICRO: "-internal-externc-isystem"
+// CHECK-BE-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Big-endian, hard float, 64-bit
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mips64-linux-gnu \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-HF-64 %s
+// CHECK-BE-HF-64: "-internal-isystem"
+// CHECK-BE-HF-64: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-BE-HF-64: "-internal-isystem"
+// CHECK-BE-HF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/64"
+// CHECK-BE-HF-64: "-internal-isystem"
+// CHECK-BE-HF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-BE-HF-64: "-internal-externc-isystem"
+// CHECK-BE-HF-64: "[[TC]]/include"
+// CHECK-BE-HF-64: "-internal-externc-isystem"
+// CHECK-BE-HF-64: "[[TC]]/include-fixed/64"
+// CHECK-BE-HF-64: "-internal-externc-isystem"
+// CHECK-BE-HF-64: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Big-endian, soft float, 64-bit
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mips64-linux-gnu -msoft-float \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-SF-64 %s
+// CHECK-BE-SF-64: "-internal-isystem"
+// CHECK-BE-SF-64: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-BE-SF-64: "-internal-isystem"
+// CHECK-BE-SF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/soft-float/64"
+// CHECK-BE-SF-64: "-internal-isystem"
+// CHECK-BE-SF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-BE-SF-64: "-internal-externc-isystem"
+// CHECK-BE-SF-64: "[[TC]]/include"
+// CHECK-BE-SF-64: "-internal-externc-isystem"
+// CHECK-BE-SF-64: "[[TC]]/include-fixed/soft-float/64"
+// CHECK-BE-SF-64: "-internal-externc-isystem"
+// CHECK-BE-SF-64: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Little-endian, hard float
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mipsel-linux-gnu -mhard-float \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-HF-32 %s
+// CHECK-EL-HF-32: "-internal-isystem"
+// CHECK-EL-HF-32: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-EL-HF-32: "-internal-isystem"
+// CHECK-EL-HF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/el"
+// CHECK-EL-HF-32: "-internal-isystem"
+// CHECK-EL-HF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-EL-HF-32: "-internal-externc-isystem"
+// CHECK-EL-HF-32: "[[TC]]/include"
+// CHECK-EL-HF-32: "-internal-externc-isystem"
+// CHECK-EL-HF-32: "[[TC]]/include-fixed/el"
+// CHECK-EL-HF-32: "-internal-externc-isystem"
+// CHECK-EL-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Little-endian, hard float, mips16
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mipsel-linux-gnu -mips16 \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-HF-16 %s
+// CHECK-EL-HF-16: "-internal-isystem"
+// CHECK-EL-HF-16: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-EL-HF-16: "-internal-isystem"
+// CHECK-EL-HF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/mips16/el"
+// CHECK-EL-HF-16: "-internal-isystem"
+// CHECK-EL-HF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-EL-HF-16: "-internal-externc-isystem"
+// CHECK-EL-HF-16: "[[TC]]/include"
+// CHECK-EL-HF-16: "-internal-externc-isystem"
+// CHECK-EL-HF-16: "[[TC]]/include-fixed/mips16/el"
+// CHECK-EL-HF-16: "-internal-externc-isystem"
+// CHECK-EL-HF-16: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Little-endian, hard float, micromips
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mipsel-linux-gnu -mmicromips \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-HF-MICRO %s
+// CHECK-EL-HF-MICRO: "-internal-isystem"
+// CHECK-EL-HF-MICRO: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-EL-HF-MICRO: "-internal-isystem"
+// CHECK-EL-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/micromips/el"
+// CHECK-EL-HF-MICRO: "-internal-isystem"
+// CHECK-EL-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-EL-HF-MICRO: "-internal-externc-isystem"
+// CHECK-EL-HF-MICRO: "[[TC]]/include"
+// CHECK-EL-HF-MICRO: "-internal-externc-isystem"
+// CHECK-EL-HF-MICRO: "[[TC]]/include-fixed/micromips/el"
+// CHECK-EL-HF-MICRO: "-internal-externc-isystem"
+// CHECK-EL-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Little-endian, soft float
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mipsel-linux-gnu -mfloat-abi=soft \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-SF-32 %s
+// CHECK-EL-SF-32: "-internal-isystem"
+// CHECK-EL-SF-32: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-EL-SF-32: "-internal-isystem"
+// CHECK-EL-SF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/soft-float/el"
+// CHECK-EL-SF-32: "-internal-isystem"
+// CHECK-EL-SF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-EL-SF-32: "-internal-externc-isystem"
+// CHECK-EL-SF-32: "[[TC]]/include"
+// CHECK-EL-SF-32: "-internal-externc-isystem"
+// CHECK-EL-SF-32: "[[TC]]/include-fixed/soft-float/el"
+// CHECK-EL-SF-32: "-internal-externc-isystem"
+// CHECK-EL-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Little-endian, soft float, mips16
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mipsel-linux-gnu -mips16 -msoft-float \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-SF-16 %s
+// CHECK-EL-SF-16: "-internal-isystem"
+// CHECK-EL-SF-16: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-EL-SF-16: "-internal-isystem"
+// CHECK-EL-SF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/mips16/soft-float/el"
+// CHECK-EL-SF-16: "-internal-isystem"
+// CHECK-EL-SF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-EL-SF-16: "-internal-externc-isystem"
+// CHECK-EL-SF-16: "[[TC]]/include"
+// CHECK-EL-SF-16: "-internal-externc-isystem"
+// CHECK-EL-SF-16: "[[TC]]/include-fixed/mips16/soft-float/el"
+// CHECK-EL-SF-16: "-internal-externc-isystem"
+// CHECK-EL-SF-16: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Little-endian, soft float, micromips
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mipsel-linux-gnu -mmicromips -msoft-float \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-SF-MICRO %s
+// CHECK-EL-SF-MICRO: "-internal-isystem"
+// CHECK-EL-SF-MICRO: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-EL-SF-MICRO: "-internal-isystem"
+// CHECK-EL-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/micromips/soft-float/el"
+// CHECK-EL-SF-MICRO: "-internal-isystem"
+// CHECK-EL-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-EL-SF-MICRO: "-internal-externc-isystem"
+// CHECK-EL-SF-MICRO: "[[TC]]/include"
+// CHECK-EL-SF-MICRO: "-internal-externc-isystem"
+// CHECK-EL-SF-MICRO: "[[TC]]/include-fixed/micromips/soft-float/el"
+// CHECK-EL-SF-MICRO: "-internal-externc-isystem"
+// CHECK-EL-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Little-endian, hard float, 64-bit
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mips64el-linux-gnu \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-HF-64 %s
+// CHECK-EL-HF-64: "-internal-isystem"
+// CHECK-EL-HF-64: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-EL-HF-64: "-internal-isystem"
+// CHECK-EL-HF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/el/64"
+// CHECK-EL-HF-64: "-internal-isystem"
+// CHECK-EL-HF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-EL-HF-64: "-internal-externc-isystem"
+// CHECK-EL-HF-64: "[[TC]]/include"
+// CHECK-EL-HF-64: "-internal-externc-isystem"
+// CHECK-EL-HF-64: "[[TC]]/include-fixed/el/64"
+// CHECK-EL-HF-64: "-internal-externc-isystem"
+// CHECK-EL-HF-64: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
+//
+// = Little-endian, soft float, 64-bit
+// RUN: %clang -no-canonical-prefixes %s -### -c -o %t.o 2>&1 \
+// RUN:     -target mips64el-linux-gnu -msoft-float \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-SF-64 %s
+// CHECK-EL-SF-64: "-internal-isystem"
+// CHECK-EL-SF-64: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
+// CHECK-EL-SF-64: "-internal-isystem"
+// CHECK-EL-SF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/soft-float/el/64"
+// CHECK-EL-SF-64: "-internal-isystem"
+// CHECK-EL-SF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
+// CHECK-EL-SF-64: "-internal-externc-isystem"
+// CHECK-EL-SF-64: "[[TC]]/include"
+// CHECK-EL-SF-64: "-internal-externc-isystem"
+// CHECK-EL-SF-64: "[[TC]]/include-fixed/soft-float/el/64"
+// CHECK-EL-SF-64: "-internal-externc-isystem"
+// CHECK-EL-SF-64: "[[TC]]/../../../../mips-linux-gnu/libc/usr/include"
diff --git a/test/Driver/mips-cs-ld.c b/test/Driver/mips-cs-ld.c
new file mode 100644
index 0000000000..96d8e7c355
--- /dev/null
+++ b/test/Driver/mips-cs-ld.c
@@ -0,0 +1,290 @@
+// REQUIRES: mips-registered-target
+//
+// Check ld invocations on Mentor Graphics MIPS toolchain.
+//
+// = Big-endian, hard float
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mips-linux-gnu \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-HF-32 %s
+// CHECK-BE-HF-32: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-HF-32: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc"
+// CHECK-BE-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/usr/lib/../lib/crt1.o"
+// CHECK-BE-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/usr/lib/../lib/crti.o"
+// CHECK-BE-HF-32: "[[TC]]/crtbegin.o"
+// CHECK-BE-HF-32: "-L[[TC]]"
+// CHECK-BE-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib"
+// CHECK-BE-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/lib"
+// CHECK-BE-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/usr/lib"
+// CHECK-BE-HF-32: "[[TC]]/crtend.o"
+// CHECK-BE-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/usr/lib/../lib/crtn.o"
+//
+// = Big-endian, hard float, mips16
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mips-linux-gnu -mips16 \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-HF-16 %s
+// CHECK-BE-HF-16: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-HF-16: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/mips16"
+// CHECK-BE-HF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/usr/lib/../lib/crt1.o"
+// CHECK-BE-HF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/usr/lib/../lib/crti.o"
+// CHECK-BE-HF-16: "[[TC]]/mips16/crtbegin.o"
+// CHECK-BE-HF-16: "-L[[TC]]/mips16"
+// CHECK-BE-HF-16: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/mips16"
+// CHECK-BE-HF-16: "-L[[TC]]"
+// CHECK-BE-HF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/lib"
+// CHECK-BE-HF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/usr/lib"
+// CHECK-BE-HF-16: "[[TC]]/mips16/crtend.o"
+// CHECK-BE-HF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/usr/lib/../lib/crtn.o"
+//
+// = Big-endian, hard float, mmicromips
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mips-linux-gnu -mmicromips \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-HF-MICRO %s
+// CHECK-BE-HF-MICRO: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-HF-MICRO: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/micromips"
+// CHECK-BE-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/usr/lib/../lib/crt1.o"
+// CHECK-BE-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/usr/lib/../lib/crti.o"
+// CHECK-BE-HF-MICRO: "[[TC]]/micromips/crtbegin.o"
+// CHECK-BE-HF-MICRO: "-L[[TC]]/micromips"
+// CHECK-BE-HF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/micromips"
+// CHECK-BE-HF-MICRO: "-L[[TC]]"
+// CHECK-BE-HF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/lib"
+// CHECK-BE-HF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/usr/lib"
+// CHECK-BE-HF-MICRO: "[[TC]]/micromips/crtend.o"
+// CHECK-BE-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/usr/lib/../lib/crtn.o"
+//
+// = Big-endian, soft float
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mips-linux-gnu -msoft-float \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-SF-32 %s
+// CHECK-BE-SF-32: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-SF-32: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/soft-float"
+// CHECK-BE-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/usr/lib/../lib/crt1.o"
+// CHECK-BE-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/usr/lib/../lib/crti.o"
+// CHECK-BE-SF-32: "[[TC]]/soft-float/crtbegin.o"
+// CHECK-BE-SF-32: "-L[[TC]]/soft-float"
+// CHECK-BE-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/soft-float"
+// CHECK-BE-SF-32: "-L[[TC]]"
+// CHECK-BE-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/soft-float/lib"
+// CHECK-BE-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/soft-float/usr/lib"
+// CHECK-BE-SF-32: "[[TC]]/soft-float/crtend.o"
+// CHECK-BE-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/usr/lib/../lib/crtn.o"
+//
+// = Big-endian, soft float, mips16
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mips-linux-gnu -msoft-float -mips16 \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-SF-16 %s
+// CHECK-BE-SF-16: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-SF-16: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/mips16/soft-float"
+// CHECK-BE-SF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/usr/lib/../lib/crt1.o"
+// CHECK-BE-SF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/usr/lib/../lib/crti.o"
+// CHECK-BE-SF-16: "[[TC]]/mips16/soft-float/crtbegin.o"
+// CHECK-BE-SF-16: "-L[[TC]]/mips16/soft-float"
+// CHECK-BE-SF-16: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/mips16/soft-float"
+// CHECK-BE-SF-16: "-L[[TC]]"
+// CHECK-BE-SF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/lib"
+// CHECK-BE-SF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/usr/lib"
+// CHECK-BE-SF-16: "[[TC]]/mips16/soft-float/crtend.o"
+// CHECK-BE-SF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/usr/lib/../lib/crtn.o"
+//
+// = Big-endian, soft float, micromips
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mips-linux-gnu -msoft-float -mmicromips \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-SF-MICRO %s
+// CHECK-BE-SF-MICRO: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-SF-MICRO: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/micromips/soft-float"
+// CHECK-BE-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/usr/lib/../lib/crt1.o"
+// CHECK-BE-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/usr/lib/../lib/crti.o"
+// CHECK-BE-SF-MICRO: "[[TC]]/micromips/soft-float/crtbegin.o"
+// CHECK-BE-SF-MICRO: "-L[[TC]]/micromips/soft-float"
+// CHECK-BE-SF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/micromips/soft-float"
+// CHECK-BE-SF-MICRO: "-L[[TC]]"
+// CHECK-BE-SF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/lib"
+// CHECK-BE-SF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/usr/lib"
+// CHECK-BE-SF-MICRO: "[[TC]]/micromips/soft-float/crtend.o"
+// CHECK-BE-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/usr/lib/../lib/crtn.o"
+//
+// = Big-endian, hard float, 64-bit
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mips64-linux-gnu \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-HF-64 %s
+// CHECK-BE-HF-64: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-HF-64: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc"
+// CHECK-BE-HF-64: "[[TC]]/../../../../mips-linux-gnu/libc/usr/lib/../lib64/crt1.o"
+// CHECK-BE-HF-64: "[[TC]]/../../../../mips-linux-gnu/libc/usr/lib/../lib64/crti.o"
+// CHECK-BE-HF-64: "[[TC]]/64/crtbegin.o"
+// CHECK-BE-HF-64: "-L[[TC]]/64"
+// CHECK-BE-HF-64: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib64"
+// CHECK-BE-HF-64: "-L[[TC]]/../../../../mips-linux-gnu/libc/lib/../lib64"
+// CHECK-BE-HF-64: "-L[[TC]]/../../../../mips-linux-gnu/libc/usr/lib/../lib64"
+// CHECK-BE-HF-64: "-L[[TC]]"
+// CHECK-BE-HF-64: "[[TC]]/64/crtend.o"
+// CHECK-BE-HF-64: "[[TC]]/../../../../mips-linux-gnu/libc/usr/lib/../lib64/crtn.o"
+//
+// = Big-endian, soft float, 64-bit
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mips64-linux-gnu -msoft-float \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-BE-SF-64 %s
+// CHECK-BE-SF-64: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-SF-64: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/soft-float"
+// CHECK-BE-SF-64: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/usr/lib/../lib64/crt1.o"
+// CHECK-BE-SF-64: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/usr/lib/../lib64/crti.o"
+// CHECK-BE-SF-64: "[[TC]]/soft-float/64/crtbegin.o"
+// CHECK-BE-SF-64: "-L[[TC]]/soft-float/64"
+// CHECK-BE-SF-64: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib64/soft-float"
+// CHECK-BE-SF-64: "-L[[TC]]/../../../../mips-linux-gnu/libc/soft-float/lib/../lib64"
+// CHECK-BE-SF-64: "-L[[TC]]/../../../../mips-linux-gnu/libc/soft-float/usr/lib/../lib64"
+// CHECK-BE-SF-64: "-L[[TC]]"
+// CHECK-BE-SF-64: "[[TC]]/soft-float/64/crtend.o"
+// CHECK-BE-SF-64: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/usr/lib/../lib64/crtn.o"
+//
+// = Little-endian, hard float
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mipsel-linux-gnu -mhard-float \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-HF-32 %s
+// CHECK-EL-HF-32: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-HF-32: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/el"
+// CHECK-EL-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/el/usr/lib/../lib/crt1.o"
+// CHECK-EL-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/el/usr/lib/../lib/crti.o"
+// CHECK-EL-HF-32: "[[TC]]/el/crtbegin.o"
+// CHECK-EL-HF-32: "-L[[TC]]/el"
+// CHECK-EL-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/el"
+// CHECK-EL-HF-32: "-L[[TC]]"
+// CHECK-EL-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/el/lib"
+// CHECK-EL-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/el/usr/lib"
+// CHECK-EL-HF-32: "[[TC]]/el/crtend.o"
+// CHECK-EL-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/el/usr/lib/../lib/crtn.o"
+//
+// = Little-endian, hard float, mips16
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mipsel-linux-gnu -mips16 \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-HF-16 %s
+// CHECK-EL-HF-16: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-HF-16: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/mips16/el"
+// CHECK-EL-HF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/el/usr/lib/../lib/crt1.o"
+// CHECK-EL-HF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/el/usr/lib/../lib/crti.o"
+// CHECK-EL-HF-16: "[[TC]]/mips16/el/crtbegin.o"
+// CHECK-EL-HF-16: "-L[[TC]]/mips16/el"
+// CHECK-EL-HF-16: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/mips16/el"
+// CHECK-EL-HF-16: "-L[[TC]]"
+// CHECK-EL-HF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/el/lib"
+// CHECK-EL-HF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/el/usr/lib"
+// CHECK-EL-HF-16: "[[TC]]/mips16/el/crtend.o"
+// CHECK-EL-HF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/el/usr/lib/../lib/crtn.o"
+//
+// = Little-endian, hard float, micromips
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mipsel-linux-gnu -mmicromips \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-HF-MICRO %s
+// CHECK-EL-HF-MICRO: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-HF-MICRO: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/micromips/el"
+// CHECK-EL-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/el/usr/lib/../lib/crt1.o"
+// CHECK-EL-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/el/usr/lib/../lib/crti.o"
+// CHECK-EL-HF-MICRO: "[[TC]]/micromips/el/crtbegin.o"
+// CHECK-EL-HF-MICRO: "-L[[TC]]/micromips/el"
+// CHECK-EL-HF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/micromips/el"
+// CHECK-EL-HF-MICRO: "-L[[TC]]"
+// CHECK-EL-HF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/el/lib"
+// CHECK-EL-HF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/el/usr/lib"
+// CHECK-EL-HF-MICRO: "[[TC]]/micromips/el/crtend.o"
+// CHECK-EL-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/el/usr/lib/../lib/crtn.o"
+//
+// = Little-endian, soft float
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mipsel-linux-gnu -mfloat-abi=soft \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-SF-32 %s
+// CHECK-EL-SF-32: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-SF-32: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/soft-float/el"
+// CHECK-EL-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/el/usr/lib/../lib/crt1.o"
+// CHECK-EL-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/el/usr/lib/../lib/crti.o"
+// CHECK-EL-SF-32: "[[TC]]/soft-float/el/crtbegin.o"
+// CHECK-EL-SF-32: "-L[[TC]]/soft-float/el"
+// CHECK-EL-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/soft-float/el"
+// CHECK-EL-SF-32: "-L[[TC]]"
+// CHECK-EL-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/soft-float/el/lib"
+// CHECK-EL-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/soft-float/el/usr/lib"
+// CHECK-EL-SF-32: "[[TC]]/soft-float/el/crtend.o"
+// CHECK-EL-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/el/usr/lib/../lib/crtn.o"
+//
+// = Little-endian, soft float, mips16
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mipsel-linux-gnu -mips16 -msoft-float \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-SF-16 %s
+// CHECK-EL-SF-16: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-SF-16: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/mips16/soft-float/el"
+// CHECK-EL-SF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/el/usr/lib/../lib/crt1.o"
+// CHECK-EL-SF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/el/usr/lib/../lib/crti.o"
+// CHECK-EL-SF-16: "[[TC]]/mips16/soft-float/el/crtbegin.o"
+// CHECK-EL-SF-16: "-L[[TC]]/mips16/soft-float/el"
+// CHECK-EL-SF-16: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/mips16/soft-float/el"
+// CHECK-EL-SF-16: "-L[[TC]]"
+// CHECK-EL-SF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/el/lib"
+// CHECK-EL-SF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/el/usr/lib"
+// CHECK-EL-SF-16: "[[TC]]/mips16/soft-float/el/crtend.o"
+// CHECK-EL-SF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/el/usr/lib/../lib/crtn.o"
+//
+// = Little-endian, soft float, micromips
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mipsel-linux-gnu -mmicromips -msoft-float \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-SF-MICRO %s
+// CHECK-EL-SF-MICRO: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-SF-MICRO: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/micromips/soft-float/el"
+// CHECK-EL-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/el/usr/lib/../lib/crt1.o"
+// CHECK-EL-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/el/usr/lib/../lib/crti.o"
+// CHECK-EL-SF-MICRO: "[[TC]]/micromips/soft-float/el/crtbegin.o"
+// CHECK-EL-SF-MICRO: "-L[[TC]]/micromips/soft-float/el"
+// CHECK-EL-SF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/micromips/soft-float/el"
+// CHECK-EL-SF-MICRO: "-L[[TC]]"
+// CHECK-EL-SF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/el/lib"
+// CHECK-EL-SF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/el/usr/lib"
+// CHECK-EL-SF-MICRO: "[[TC]]/micromips/soft-float/el/crtend.o"
+// CHECK-EL-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/el/usr/lib/../lib/crtn.o"
+//
+// = Little-endian, hard float, 64-bit
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mips64el-linux-gnu \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-HF-64 %s
+// CHECK-EL-HF-64: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-HF-64: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/el"
+// CHECK-EL-HF-64: "[[TC]]/../../../../mips-linux-gnu/libc/el/usr/lib/../lib64/crt1.o"
+// CHECK-EL-HF-64: "[[TC]]/../../../../mips-linux-gnu/libc/el/usr/lib/../lib64/crti.o"
+// CHECK-EL-HF-64: "[[TC]]/el/64/crtbegin.o"
+// CHECK-EL-HF-64: "-L[[TC]]/el/64"
+// CHECK-EL-HF-64: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib64/el"
+// CHECK-EL-HF-64: "-L[[TC]]/../../../../mips-linux-gnu/libc/el/lib/../lib64"
+// CHECK-EL-HF-64: "-L[[TC]]/../../../../mips-linux-gnu/libc/el/usr/lib/../lib64"
+// CHECK-EL-HF-64: "-L[[TC]]"
+// CHECK-EL-HF-64: "[[TC]]/el/64/crtend.o"
+// CHECK-EL-HF-64: "[[TC]]/../../../../mips-linux-gnu/libc/el/usr/lib/../lib64/crtn.o"
+//
+// = Little-endian, soft float, 64-bit
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target mips64el-linux-gnu -msoft-float \
+// RUN:     -gcc-toolchain %S/Inputs/mips_cs_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-EL-SF-64 %s
+// CHECK-EL-SF-64: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-SF-64: "--sysroot=[[TC:[^"]+]]/../../../../mips-linux-gnu/libc/soft-float/el"
+// CHECK-EL-SF-64: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/el/usr/lib/../lib64/crt1.o"
+// CHECK-EL-SF-64: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/el/usr/lib/../lib64/crti.o"
+// CHECK-EL-SF-64: "[[TC]]/soft-float/el/64/crtbegin.o"
+// CHECK-EL-SF-64: "-L[[TC]]/soft-float/el/64"
+// CHECK-EL-SF-64: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib64/soft-float/el"
+// CHECK-EL-SF-64: "-L[[TC]]/../../../../mips-linux-gnu/libc/soft-float/el/lib/../lib64"
+// CHECK-EL-SF-64: "-L[[TC]]/../../../../mips-linux-gnu/libc/soft-float/el/usr/lib/../lib64"
+// CHECK-EL-SF-64: "-L[[TC]]"
+// CHECK-EL-SF-64: "[[TC]]/soft-float/el/64/crtend.o"
+// CHECK-EL-SF-64: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/el/usr/lib/../lib64/crtn.o"