canonicalize inttoptr and ptrtoint instructions which cast pointers

to/from integer types that are not intptr_t to convert to intptr_t
then do an integer conversion to the dest type.  This exposes the
cast to the optimizer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67638 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 16 insertions, 0 deletions

diff --git a/test/Transforms/InstCombine/ptr-int-cast.ll b/test/Transforms/InstCombine/ptr-int-cast.ll
new file mode 100644
index 0000000000..5c15439777
--- /dev/null
+++ b/test/Transforms/InstCombine/ptr-int-cast.ll
@@ -0,0 +1,16 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis > %t
+
+define i1 @test1(i32 *%x) nounwind {
+entry:
+; RUN: grep {ptrtoint i32\\* %x to i64} %t
+	%tmp = ptrtoint i32* %x to i1
+	ret i1 %tmp
+}
+
+define i32* @test2(i128 %x) nounwind {
+entry:
+; RUN: grep {inttoptr i64 %.mp1 to i32\\*} %t
+	%tmp = inttoptr i128 %x to i32*
+	ret i32* %tmp
+}
+