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| author | Craig Topper <craig.topper@intel.com> | 2018-02-20 17:41:00 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@intel.com> | 2018-02-20 17:41:00 +0000 |
| commit | 010ae8dcbbd8861f4e9f6883218b2e51c3163b9c (patch) | |
| tree | 1a6402191cc334268b8f65661bff3f080b20e71f /llvm/test/CodeGen/X86/bool-simplify.ll | |
| parent | 563c901bac5ea12b8364c2c38c2264c4c1d027ec (diff) | |
| download | bcm5719-llvm-010ae8dcbbd8861f4e9f6883218b2e51c3163b9c.tar.gz bcm5719-llvm-010ae8dcbbd8861f4e9f6883218b2e51c3163b9c.zip | |
[X86] Promote 16-bit cmovs to 32-bits
This allows us to avoid an opsize prefix. And forcing some move immediates to i32 avoids a length changing prefix on those instructions.
This mostly replaces the existing combine we had for zext/sext+cmov of constants. I left in a case for sign extending a 32 bit cmov of constants to 64 bits.
Differential Revision: https://reviews.llvm.org/D43327
llvm-svn: 325601
Diffstat (limited to 'llvm/test/CodeGen/X86/bool-simplify.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/bool-simplify.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/test/CodeGen/X86/bool-simplify.ll b/llvm/test/CodeGen/X86/bool-simplify.ll index 60931a7d8b3..bbb7eb7c176 100644 --- a/llvm/test/CodeGen/X86/bool-simplify.ll +++ b/llvm/test/CodeGen/X86/bool-simplify.ll @@ -53,7 +53,7 @@ define i16 @rnd16(i16 %arg) nounwind { ; CHECK: # %bb.0: ; CHECK-NEXT: xorl %eax, %eax ; CHECK-NEXT: rdrandw %cx -; CHECK-NEXT: cmovbw %di, %ax +; CHECK-NEXT: cmovbl %edi, %eax ; CHECK-NEXT: addl %ecx, %eax ; CHECK-NEXT: # kill: def $ax killed $ax killed $eax ; CHECK-NEXT: retq @@ -105,7 +105,7 @@ define i16 @seed16(i16 %arg) nounwind { ; CHECK: # %bb.0: ; CHECK-NEXT: xorl %eax, %eax ; CHECK-NEXT: rdseedw %cx -; CHECK-NEXT: cmovbw %di, %ax +; CHECK-NEXT: cmovbl %edi, %eax ; CHECK-NEXT: addl %ecx, %eax ; CHECK-NEXT: # kill: def $ax killed $ax killed $eax ; CHECK-NEXT: retq |
