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| author | Duncan Sands <baldrick@free.fr> | 2011-10-28 18:17:44 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2011-10-28 18:17:44 +0000 |
| commit | c65c747bc4ee7d3ca8463d33708bbb2aed38a809 (patch) | |
| tree | b4fe02a85576afb4210e7f0a704a7c7a46cf4804 /test/Transforms | |
| parent | cb9fed665550376b7c65c7e1157a58911193e2e2 (diff) | |
| download | llvm-c65c747bc4ee7d3ca8463d33708bbb2aed38a809.tar.gz llvm-c65c747bc4ee7d3ca8463d33708bbb2aed38a809.tar.bz2 llvm-c65c747bc4ee7d3ca8463d33708bbb2aed38a809.tar.xz | |
Fold icmp ugt (udiv X, Y), X to false. Spotted by my super-optimizer
in 186.crafty.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143209 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms')
| -rw-r--r-- | test/Transforms/InstSimplify/compare.ll | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/test/Transforms/InstSimplify/compare.ll b/test/Transforms/InstSimplify/compare.ll index 3ece118902..57727c9ab7 100644 --- a/test/Transforms/InstSimplify/compare.ll +++ b/test/Transforms/InstSimplify/compare.ll @@ -300,6 +300,30 @@ define i1 @udiv2(i32 %X, i32 %Y, i32 %Z) { ; CHECK: ret i1 true } +define i1 @udiv3(i32 %X, i32 %Y) { +; CHECK: @udiv3 + %A = udiv i32 %X, %Y + %C = icmp ugt i32 %A, %X + ret i1 %C +; CHECK: ret i1 false +} + +define i1 @udiv4(i32 %X, i32 %Y) { +; CHECK: @udiv4 + %A = udiv i32 %X, %Y + %C = icmp ule i32 %A, %X + ret i1 %C +; CHECK: ret i1 true +} + +define i1 @udiv5(i32 %X) { +; CHECK: @udiv5 + %A = udiv i32 123, %X + %C = icmp ugt i32 %A, 124 + ret i1 %C +; CHECK: ret i1 false +} + define i1 @sdiv1(i32 %X) { ; CHECK: @sdiv1 %A = sdiv i32 %X, 1000000 |