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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2011-07-04 20:16:36 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2011-07-04 20:16:36 +0000 |
| commit | 9eca5feff1fc77a914ca6b1a4daabcbc72b98f01 (patch) | |
| tree | ecd1dfe80ce932b127bb7e79b02229efd105ff59 /llvm/test/Transforms/InstCombine | |
| parent | 1052fd76ab1a9dd8f6568021e51e859170b616e5 (diff) | |
| download | bcm5719-llvm-9eca5feff1fc77a914ca6b1a4daabcbc72b98f01.tar.gz bcm5719-llvm-9eca5feff1fc77a914ca6b1a4daabcbc72b98f01.zip | |
PR10267: Don't combine an equality compare with an AND into an inequality compare when the AND has more than one use.
This can pessimize code, inequalities are generally more expensive.
llvm-svn: 134379
Diffstat (limited to 'llvm/test/Transforms/InstCombine')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/icmp.ll | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/icmp.ll b/llvm/test/Transforms/InstCombine/icmp.ll index c8f7f81468f..77ca62cfec6 100644 --- a/llvm/test/Transforms/InstCombine/icmp.ll +++ b/llvm/test/Transforms/InstCombine/icmp.ll @@ -547,3 +547,15 @@ define i1 @test56(i32 %a) { %cmp = icmp eq i32 %sub, 123 ret i1 %cmp } + +; PR10267 Don't make icmps more expensive when no other inst is subsumed. +declare void @foo(i32) +; CHECK: @test57 +; CHECK: %and = and i32 %a, -2 +; CHECK: %cmp = icmp ne i32 %and, 0 +define i1 @test57(i32 %a) { + %and = and i32 %a, -2 + %cmp = icmp ne i32 %and, 0 + call void @foo(i32 %and) + ret i1 %cmp +} |
