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| author | Duncan Sands <baldrick@free.fr> | 2011-02-02 20:52:00 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2011-02-02 20:52:00 +0000 |
| commit | 4b720718fbda1194f925e0a9d931bc220e8b0e3a (patch) | |
| tree | 4580e5c6f9c1fb68da8f79d786218f13665453f9 /test/Transforms/InstSimplify | |
| parent | 79fcb6dec3e6e30a30835ebc781e5abc275e12e9 (diff) | |
| download | llvm-4b720718fbda1194f925e0a9d931bc220e8b0e3a.tar.gz llvm-4b720718fbda1194f925e0a9d931bc220e8b0e3a.tar.bz2 llvm-4b720718fbda1194f925e0a9d931bc220e8b0e3a.tar.xz | |
Reenable the transform "(X*Y)/Y->X" when the multiplication is known not to
overflow (nsw flag), which was disabled because it breaks 254.gap. I have
informed the GAP authors of the mistake in their code, and arranged for the
testsuite to use -fwrapv when compiling this benchmark.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124746 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstSimplify')
| -rw-r--r-- | test/Transforms/InstSimplify/2010-12-20-Reassociate.ll | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/test/Transforms/InstSimplify/2010-12-20-Reassociate.ll b/test/Transforms/InstSimplify/2010-12-20-Reassociate.ll index c0ae257dcd..928442ac56 100644 --- a/test/Transforms/InstSimplify/2010-12-20-Reassociate.ll +++ b/test/Transforms/InstSimplify/2010-12-20-Reassociate.ll @@ -92,10 +92,12 @@ define i32 @sub3(i32 %x, i32 %y) { } define i32 @sdiv1(i32 %x, i32 %y) { +; CHECK: @sdiv1 ; (no overflow X * Y) / Y -> X %mul = mul nsw i32 %x, %y %r = sdiv i32 %mul, %y ret i32 %r +; CHECK: ret i32 %x } define i32 @sdiv2(i32 %x, i32 %y) { @@ -136,10 +138,12 @@ define i32 @sdiv5(i32 %x, i32 %y) { } define i32 @udiv1(i32 %x, i32 %y) { +; CHECK: @udiv1 ; (no overflow X * Y) / Y -> X %mul = mul nuw i32 %x, %y %r = udiv i32 %mul, %y ret i32 %r +; CHECK: ret i32 %x } define i32 @udiv2(i32 %x, i32 %y) { |