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| author | Lang Hames <lhames@gmail.com> | 2014-04-22 07:40:34 +0000 |
|---|---|---|
| committer | Lang Hames <lhames@gmail.com> | 2014-04-22 07:40:34 +0000 |
| commit | f6f42cac3fa294aba6225c749165486bf6142135 (patch) | |
| tree | 96f6138b95d6da7d9165c8b23b4019a3b17ed365 /llvm/test/CodeGen/X86/bmi.ll | |
| parent | afd2c6be0e90b6e069d768b6a65668186985b5e8 (diff) | |
| download | bcm5719-llvm-f6f42cac3fa294aba6225c749165486bf6142135.tar.gz bcm5719-llvm-f6f42cac3fa294aba6225c749165486bf6142135.zip | |
[X86] Don't use BZHI for short masks (>=32 bits). Thanks to Ben Kramer for the
review.
llvm-svn: 206869
Diffstat (limited to 'llvm/test/CodeGen/X86/bmi.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/bmi.ll | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/llvm/test/CodeGen/X86/bmi.ll b/llvm/test/CodeGen/X86/bmi.ll index c04fe9b5cfa..a70720926de 100644 --- a/llvm/test/CodeGen/X86/bmi.ll +++ b/llvm/test/CodeGen/X86/bmi.ll @@ -216,22 +216,21 @@ entry: ; CHECK: bzhiq } -define i32 @bzhi32_constant_mask(i32 %x) #0 { -entry: - %and = and i32 %x, 1073741823 - ret i32 %and -; CHECK-LABEL: bzhi32_constant_mask: -; CHECK: movb $30, %al -; CHECK: bzhil %eax, %e[[ARG1:di|cx]], %eax -} - define i64 @bzhi64_constant_mask(i64 %x) #0 { entry: %and = and i64 %x, 4611686018427387903 ret i64 %and ; CHECK-LABEL: bzhi64_constant_mask: ; CHECK: movb $62, %al -; CHECK: bzhiq %rax, %r[[ARG1]], %rax +; CHECK: bzhiq %rax, %r[[ARG1:di|cx]], %rax +} + +define i64 @bzhi64_small_constant_mask(i64 %x) #0 { +entry: + %and = and i64 %x, 2147483647 + ret i64 %and +; CHECK-LABEL: bzhi64_small_constant_mask: +; CHECK: andq $2147483647, %r[[ARG1]] } define i32 @blsi32(i32 %x) nounwind readnone { |
