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| author | Evan Cheng <evan.cheng@apple.com> | 2012-05-18 01:33:51 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2012-05-18 01:33:51 +0000 |
| commit | ad753648155590f1c70bd168e8cf11a414957387 (patch) | |
| tree | 65d1900a4731a205da81f2720bb7e8f8f3c59658 /test | |
| parent | 6f55e3d57d3d971ee588f426d6d8223a879b17ab (diff) | |
| download | llvm-ad753648155590f1c70bd168e8cf11a414957387.tar.gz llvm-ad753648155590f1c70bd168e8cf11a414957387.tar.bz2 llvm-ad753648155590f1c70bd168e8cf11a414957387.tar.xz | |
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non-profitable commute using outdated info.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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157038 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/2012-05-17-TwoAddressBug.ll | 16 |
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 0000000000..171c3f18dc --- /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%s + +; Teach two-address pass to update the "source" map so it doesn't perform a +; non-profitable commute using outdated info.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 +} |