diff options
| author | Lang Hames <lhames@gmail.com> | 2014-04-21 08:18:53 +0000 |
|---|---|---|
| committer | Lang Hames <lhames@gmail.com> | 2014-04-21 08:18:53 +0000 |
| commit | 5aa6ee80b699c2afc1e185148846e75af97eff98 (patch) | |
| tree | 3280ecaf4503871888e275a1eb0205f629a9296b /llvm/test/CodeGen/X86 | |
| parent | 589441820e5047ebb64a91cebb283500dbc9d481 (diff) | |
| download | bcm5719-llvm-5aa6ee80b699c2afc1e185148846e75af97eff98.tar.gz bcm5719-llvm-5aa6ee80b699c2afc1e185148846e75af97eff98.zip | |
[X86] ISEL (and X, <constant mask>) to BZHI when BMI2 is available.
Generating BZHI in the variable mask case, i.e. (and X, (sub (shl 1, N), 1)),
was already supported, but we were missing the constant-mask case. This patch
fixes that.
<rdar://problem/15480077>
llvm-svn: 206738
Diffstat (limited to 'llvm/test/CodeGen/X86')
| -rw-r--r-- | llvm/test/CodeGen/X86/bmi.ll | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/bmi.ll b/llvm/test/CodeGen/X86/bmi.ll index 242075a878b..1dc2edb7ea4 100644 --- a/llvm/test/CodeGen/X86/bmi.ll +++ b/llvm/test/CodeGen/X86/bmi.ll @@ -216,6 +216,24 @@ 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, %edi, %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, %rdi, %rax +} + define i32 @blsi32(i32 %x) nounwind readnone { %tmp = sub i32 0, %x %tmp2 = and i32 %x, %tmp |
