Implement Subtarget support

Implement the X86 Subtarget.

This consolidates the checks for target triple, and setting options based
on target triple into one place.  This allows us to convert the asm printer
and isel over from being littered with "forDarwin", "forCygwin", etc. into
just having the appropriate flags for each subtarget feature controlling
the code for that feature.

This patch also implements indirect external and weak references in the
X86 pattern isel, for darwin.  Next up is to convert over the asm printers
to use this new interface.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22389 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/Target/X86/X86TargetMachine.cpp b/lib/Target/X86/X86TargetMachine.cpp
index a0537f529c..f4d5ba40ec 100644
--- a/lib/Target/X86/X86TargetMachine.cpp
+++ b/lib/Target/X86/X86TargetMachine.cpp
@@ -92,7 +92,9 @@ unsigned X86TargetMachine::getModuleMatchQuality(const Module &M) {
 ///
 X86TargetMachine::X86TargetMachine(const Module &M, IntrinsicLowering *IL)
   : TargetMachine("X86", IL, true, 4, 4, 4, 4, 4),
-    FrameInfo(TargetFrameInfo::StackGrowsDown, 8, -4),
+    Subtarget(M),
+    FrameInfo(TargetFrameInfo::StackGrowsDown,
+              Subtarget.getStackAlignment(), -4),
     JITInfo(*this) {
   // Scalar SSE FP requires at least SSE2
   X86ScalarSSE &= X86Vector >= SSE2;