Vendor import of llvm trunk r161861:

http://llvm.org/svn/llvm-project/llvm/trunk@161861

1 files changed, 16 insertions, 0 deletions

diff --git a/test/CodeGen/X86/2012-05-17-TwoAddressBug.ll b/test/CodeGen/X86/2012-05-17-TwoAddressBug.ll
new file mode 100644
index 0000000..171c3f1
--- /dev/null
+++ b/test/CodeGen/X86/2012-05-17-TwoAddressBug.ll
@@ -0,0 +1,16 @@
+; RUN: llc < %s -mtriple=x86_64-apple-macosx -pre-RA-sched=source | FileCheck %s
+
+; Teach two-address pass to update the "source" map so it doesn't perform a
+; non-profitable commute using outdated info. The test case would still fail
+; because of poor pre-RA schedule. That will be fixed by MI scheduler.
+; rdar://11472010
+define i32 @t(i32 %mask) nounwind readnone ssp {
+entry:
+; CHECK: t:
+; CHECK-NOT: mov
+  %sub = add i32 %mask, -65535
+  %shr = lshr i32 %sub, 23
+  %and = and i32 %mask, 1
+  %add = add i32 %shr, %and
+  ret i32 %add
+}