diff options
| author | Benjamin Kramer <benny.kra@googlemail.com> | 2014-06-06 21:08:55 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2014-06-06 21:08:55 +0000 |
| commit | d0700b29195b72c3af8dc8f05dfb6ed04ca3e907 (patch) | |
| tree | c0750c870807f77dd1f7e56b2d811900e3f5b33d /llvm/test/CodeGen | |
| parent | 2c8dda4e53a305566bfd92967166ffe68d53851b (diff) | |
| download | bcm5719-llvm-d0700b29195b72c3af8dc8f05dfb6ed04ca3e907.tar.gz bcm5719-llvm-d0700b29195b72c3af8dc8f05dfb6ed04ca3e907.zip | |
X86: Don't turn shifts into ands if there's another use that may not check for equality.
Fixes PR19964.
llvm-svn: 210371
Diffstat (limited to 'llvm/test/CodeGen')
| -rw-r--r-- | llvm/test/CodeGen/X86/cmp.ll | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/cmp.ll b/llvm/test/CodeGen/X86/cmp.ll index cdcdc963ed1..149d53759fe 100644 --- a/llvm/test/CodeGen/X86/cmp.ll +++ b/llvm/test/CodeGen/X86/cmp.ll @@ -198,3 +198,16 @@ define i32 @test14(i32 %mask, i32 %base, i32 %intra) #0 { ; CHECK: shrl $7, %edi ; CHECK-NEXT: cmovnsl %edx, %esi } + +; PR19964 +define zeroext i1 @test15(i32 %bf.load, i32 %n) { + %bf.lshr = lshr i32 %bf.load, 16 + %cmp2 = icmp eq i32 %bf.lshr, 0 + %cmp5 = icmp uge i32 %bf.lshr, %n + %.cmp5 = or i1 %cmp2, %cmp5 + ret i1 %.cmp5 + +; CHECK-LABEL: test15: +; CHECK: shrl $16, %edi +; CHECK: cmpl %esi, %edi +} |
