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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2011-01-17 18:00:28 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2011-01-17 18:00:28 +0000 |
| commit | 45d183ccf01f6f796ff9adc76b4f3871a011335a (patch) | |
| tree | ac3feef7e90af9fe7cbfea8e3444ba7045550668 /llvm/test/CodeGen | |
| parent | 3ec1f198e592833679748aca5c8796cd8db24b23 (diff) | |
| download | bcm5719-llvm-45d183ccf01f6f796ff9adc76b4f3871a011335a.tar.gz bcm5719-llvm-45d183ccf01f6f796ff9adc76b4f3871a011335a.zip | |
Fix an off-by-one error in ctpop combining.
llvm-svn: 123664
Diffstat (limited to 'llvm/test/CodeGen')
| -rw-r--r-- | llvm/test/CodeGen/X86/ctpop-combine.ll | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/llvm/test/CodeGen/X86/ctpop-combine.ll b/llvm/test/CodeGen/X86/ctpop-combine.ll index b87637f9424..c957d385a24 100644 --- a/llvm/test/CodeGen/X86/ctpop-combine.ll +++ b/llvm/test/CodeGen/X86/ctpop-combine.ll @@ -18,8 +18,7 @@ define i32 @test1(i64 %x) nounwind readnone { define i32 @test2(i64 %x) nounwind readnone { %count = tail call i64 @llvm.ctpop.i64(i64 %x) - %cast = trunc i64 %count to i32 - %cmp = icmp ult i32 %cast, 2 + %cmp = icmp ult i64 %count, 2 %conv = zext i1 %cmp to i32 ret i32 %conv ; CHECK: test2: @@ -29,3 +28,13 @@ define i32 @test2(i64 %x) nounwind readnone { ; CHECK: ret } +define i32 @test3(i64 %x) nounwind readnone { + %count = tail call i64 @llvm.ctpop.i64(i64 %x) + %cast = trunc i64 %count to i6 ; Too small for 0-64 + %cmp = icmp ult i6 %cast, 2 + %conv = zext i1 %cmp to i32 + ret i32 %conv +; CHECK: test3: +; CHECK: cmpb $2 +; CHECK: ret +} |
