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| author | Nick Lewycky <nicholas@mxc.ca> | 2011-03-01 08:15:50 +0000 |
|---|---|---|
| committer | Nick Lewycky <nicholas@mxc.ca> | 2011-03-01 08:15:50 +0000 |
| commit | 88cd0aadb2849a259e8656b0ff8439ef660db7c5 (patch) | |
| tree | 6ce65a7ae0c7f343cf249c72ef2150feca450042 /test/Transforms/InstSimplify | |
| parent | 9d40193d79052fb4ddd0f667f0fe47f07922c72a (diff) | |
| download | llvm-88cd0aadb2849a259e8656b0ff8439ef660db7c5.tar.gz llvm-88cd0aadb2849a259e8656b0ff8439ef660db7c5.tar.bz2 llvm-88cd0aadb2849a259e8656b0ff8439ef660db7c5.tar.xz | |
Optimize "icmp pred (urem X, Y), Y" --> true/false depending on pred. There's
more work to do here, "icmp ult (urem X, 10), 11" doesn't optimize away yet.
Fixes example 3 from PR9343!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126741 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstSimplify')
| -rw-r--r-- | test/Transforms/InstSimplify/compare.ll | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/test/Transforms/InstSimplify/compare.ll b/test/Transforms/InstSimplify/compare.ll index 250e44ce34..f392d3a5e7 100644 --- a/test/Transforms/InstSimplify/compare.ll +++ b/test/Transforms/InstSimplify/compare.ll @@ -187,3 +187,19 @@ define i1 @select4(i1 %cond) { ret i1 %c ; CHECK: ret i1 %cond } + +define i1 @urem1(i32 %X, i32 %Y) { +; CHECK: @urem1 + %A = urem i32 %X, %Y + %B = icmp ult i32 %A, %Y + ret i1 %B +; CHECK: ret i1 true +} + +define i1 @urem2(i32 %X, i32 %Y) { +; CHECK: @urem2 + %A = urem i32 %X, %Y + %B = icmp eq i32 %A, %Y + ret i1 %B +; CHECK ret i1 false +} |