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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-05-03 22:40:32 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-05-03 22:40:32 +0000 |
| commit | b98c549d135c8f38b2fc1b086cc46f0b243ce862 (patch) | |
| tree | 9633c7cdcbe96c59997591eb3556a657d5408f22 /test | |
| parent | d4d01154ef0cb9d84d1c1c342ec9d3115d932e99 (diff) | |
| download | external_llvm-b98c549d135c8f38b2fc1b086cc46f0b243ce862.zip external_llvm-b98c549d135c8f38b2fc1b086cc46f0b243ce862.tar.gz external_llvm-b98c549d135c8f38b2fc1b086cc46f0b243ce862.tar.bz2 | |
Check that subregisters don't have independent values in RemoveCopyByCommutingDef().
This fixes PR6941.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102970 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/2010-05-03-CoalescerSubRegClobber.ll | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2010-05-03-CoalescerSubRegClobber.ll b/test/CodeGen/X86/2010-05-03-CoalescerSubRegClobber.ll new file mode 100644 index 0000000..323925c --- /dev/null +++ b/test/CodeGen/X86/2010-05-03-CoalescerSubRegClobber.ll @@ -0,0 +1,33 @@ +; RUN: llc < %s | FileCheck %s +; PR6941 +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" +target triple = "x86_64-apple-darwin10.0.0" + +define i32 @snd_xbytes(i32 %v, i32 %from, i32 %to) nounwind readnone ssp { +entry: + %cmp19 = icmp eq i32 %to, 0 ; <i1> [#uses=1] + br i1 %cmp19, label %while.end, label %while.cond + +while.cond: ; preds = %entry, %while.cond + %y.021 = phi i32 [ %rem, %while.cond ], [ %to, %entry ] ; <i32> [#uses=3] + %x.020 = phi i32 [ %y.021, %while.cond ], [ %from, %entry ] ; <i32> [#uses=1] + %rem = urem i32 %x.020, %y.021 ; <i32> [#uses=2] + %cmp = icmp eq i32 %rem, 0 ; <i1> [#uses=1] + br i1 %cmp, label %while.end, label %while.cond + +while.end: ; preds = %while.cond, %entry + %x.0.lcssa = phi i32 [ %from, %entry ], [ %y.021, %while.cond ] ; <i32> [#uses=2] + %div = udiv i32 %from, %x.0.lcssa ; <i32> [#uses=1] + %div11 = udiv i32 %to, %x.0.lcssa ; <i32> [#uses=1] + %conv = zext i32 %v to i64 ; <i64> [#uses=1] + %conv14 = zext i32 %div11 to i64 ; <i64> [#uses=1] +; Verify that we don't clobber %eax after putting the imulq result in %rax +; CHECK: imulq %r{{.}}x, %r[[RES:.]]x +; CHECK-NOT: movl {{.*}}, %e[[RES]]x +; CHECK: div + %mul = mul i64 %conv14, %conv ; <i64> [#uses=1] + %conv16 = zext i32 %div to i64 ; <i64> [#uses=1] + %div17 = udiv i64 %mul, %conv16 ; <i64> [#uses=1] + %conv18 = trunc i64 %div17 to i32 ; <i32> [#uses=1] + ret i32 %conv18 +} |