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1f4a5003d2
xor/and/or (bitcast(A), bitcast(B)) -> bitcast(op (A,B)) was only being combined at the AfterLegalizeTypes stage, this patch permits the combine to occur anytime before then as well. The main aim with this to improve the ability to recognise bitmasks that can be converted to shuffles. I had to modify a number of AVX512 mask tests as the basic bitcast to/from scalar pattern was being stripped out, preventing testing of the mmask bitops. By replacing the bitcasts with loads we can get almost the same result. Differential Revision: http://reviews.llvm.org/D18944 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265998 91177308-0d34-0410-b5e6-96231b3b80d8
68 lines
1.9 KiB
LLVM
68 lines
1.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=skx | FileCheck %s
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define i8 @mask8(i8 %x) {
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; CHECK-LABEL: mask8:
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; CHECK: ## BB#0:
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; CHECK-NEXT: kmovb %edi, %k0
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; CHECK-NEXT: knotb %k0, %k0
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; CHECK-NEXT: kmovb %k0, %eax
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; CHECK-NEXT: retq
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%m0 = bitcast i8 %x to <8 x i1>
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%m1 = xor <8 x i1> %m0, <i1 -1, i1 -1, i1 -1, i1 -1, i1 -1, i1 -1, i1 -1, i1 -1>
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%ret = bitcast <8 x i1> %m1 to i8
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ret i8 %ret
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}
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define void @mask8_mem(i8* %ptr) {
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; CHECK-LABEL: mask8_mem:
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; CHECK: ## BB#0:
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; CHECK-NEXT: kmovb (%rdi), %k0
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; CHECK-NEXT: knotb %k0, %k0
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; CHECK-NEXT: kmovb %k0, (%rdi)
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; CHECK-NEXT: retq
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%x = load i8, i8* %ptr, align 4
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%m0 = bitcast i8 %x to <8 x i1>
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%m1 = xor <8 x i1> %m0, <i1 -1, i1 -1, i1 -1, i1 -1, i1 -1, i1 -1, i1 -1, i1 -1>
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%ret = bitcast <8 x i1> %m1 to i8
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store i8 %ret, i8* %ptr, align 4
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ret void
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}
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define i8 @mand8(i8 %x, i8 %y) {
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; CHECK-LABEL: mand8:
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; CHECK: ## BB#0:
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; CHECK-NEXT: movl %edi, %eax
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; CHECK-NEXT: xorl %esi, %eax
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; CHECK-NEXT: andl %esi, %edi
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; CHECK-NEXT: orl %eax, %edi
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; CHECK-NEXT: movb %dil, %al
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; CHECK-NEXT: retq
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%ma = bitcast i8 %x to <8 x i1>
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%mb = bitcast i8 %y to <8 x i1>
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%mc = and <8 x i1> %ma, %mb
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%md = xor <8 x i1> %ma, %mb
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%me = or <8 x i1> %mc, %md
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%ret = bitcast <8 x i1> %me to i8
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ret i8 %ret
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}
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define i8 @mand8_mem(<8 x i1>* %x, <8 x i1>* %y) {
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; CHECK-LABEL: mand8_mem:
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; CHECK: ## BB#0:
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; CHECK-NEXT: kmovb (%rdi), %k0
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; CHECK-NEXT: kmovb (%rsi), %k1
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; CHECK-NEXT: kandb %k1, %k0, %k2
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; CHECK-NEXT: kxorb %k1, %k0, %k0
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; CHECK-NEXT: korb %k0, %k2, %k0
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; CHECK-NEXT: kmovb %k0, %eax
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; CHECK-NEXT: retq
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%ma = load <8 x i1>, <8 x i1>* %x
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%mb = load <8 x i1>, <8 x i1>* %y
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%mc = and <8 x i1> %ma, %mb
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%md = xor <8 x i1> %ma, %mb
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%me = or <8 x i1> %mc, %md
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%ret = bitcast <8 x i1> %me to i8
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ret i8 %ret
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}
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