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1b5d421e4d
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202528 91177308-0d34-0410-b5e6-96231b3b80d8
97 lines
3.6 KiB
LLVM
97 lines
3.6 KiB
LLVM
; RUN: llc < %s -o - -mcpu=generic -mtriple=x86_64-apple-darwin -mattr=+sse2 | FileCheck %s
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; RUN: llc < %s -o - -mcpu=generic -mtriple=x86_64-apple-darwin -mattr=+sse4.2 | FileCheck %s
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; For a setult against a constant, turn it into a setule and lower via psubusw.
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define void @loop_no_const_reload(<2 x i64>* %in, <2 x i64>* %out, i32 %n) {
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; CHECK: .short 25
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; CHECK-NEXT: .short 25
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; CHECK-NEXT: .short 25
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; CHECK-NEXT: .short 25
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; CHECK-NEXT: .short 25
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; CHECK-NEXT: .short 25
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; CHECK-NEXT: .short 25
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; CHECK-NEXT: .short 25
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; CHECK-LABEL: loop_no_const_reload:
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; CHECK: psubusw
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; Constant is no longer clobbered so no need to reload it in the loop.
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; CHECK-NOT: movdqa {{%xmm[0-9]+}}, {{%xmm[0-9]+}}
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entry:
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%cmp9 = icmp eq i32 %n, 0
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br i1 %cmp9, label %for.end, label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
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%arrayidx1 = getelementptr inbounds <2 x i64>* %in, i64 %indvars.iv
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%arrayidx1.val = load <2 x i64>* %arrayidx1, align 16
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%0 = bitcast <2 x i64> %arrayidx1.val to <8 x i16>
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%cmp.i.i = icmp ult <8 x i16> %0, <i16 26, i16 26, i16 26, i16 26, i16 26, i16 26, i16 26, i16 26>
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%sext.i.i = sext <8 x i1> %cmp.i.i to <8 x i16>
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%1 = bitcast <8 x i16> %sext.i.i to <2 x i64>
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%arrayidx5 = getelementptr inbounds <2 x i64>* %out, i64 %indvars.iv
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store <2 x i64> %1, <2 x i64>* %arrayidx5, align 16
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body, %entry
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ret void
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}
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; Be careful if decrementing the constant would undeflow.
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define void @loop_const_folding_underflow(<2 x i64>* %in, <2 x i64>* %out, i32 %n) {
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; CHECK-NOT: .short 25
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; CHECK-LABEL: loop_const_folding_underflow:
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; CHECK-NOT: psubusw
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entry:
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%cmp9 = icmp eq i32 %n, 0
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br i1 %cmp9, label %for.end, label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
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%arrayidx1 = getelementptr inbounds <2 x i64>* %in, i64 %indvars.iv
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%arrayidx1.val = load <2 x i64>* %arrayidx1, align 16
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%0 = bitcast <2 x i64> %arrayidx1.val to <8 x i16>
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%cmp.i.i = icmp ult <8 x i16> %0, <i16 0, i16 26, i16 26, i16 26, i16 26, i16 26, i16 26, i16 26>
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%sext.i.i = sext <8 x i1> %cmp.i.i to <8 x i16>
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%1 = bitcast <8 x i16> %sext.i.i to <2 x i64>
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%arrayidx5 = getelementptr inbounds <2 x i64>* %out, i64 %indvars.iv
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store <2 x i64> %1, <2 x i64>* %arrayidx5, align 16
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body, %entry
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ret void
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}
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; Test for PSUBUSB
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define <16 x i8> @test_ult_byte(<16 x i8> %a) {
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; CHECK: .space 16,10
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; CHECK-LABEL: test_ult_byte:
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; CHECK: psubus
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entry:
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%icmp = icmp ult <16 x i8> %a, <i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11>
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%sext = sext <16 x i1> %icmp to <16 x i8>
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ret <16 x i8> %sext
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}
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; Only do this when we can turn the comparison into a setule. I.e. not for
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; register operands.
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define <8 x i16> @test_ult_register(<8 x i16> %a, <8 x i16> %b) {
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; CHECK-LABEL: test_ult_register:
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; CHECK-NOT: psubus
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entry:
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%icmp = icmp ult <8 x i16> %a, %b
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%sext = sext <8 x i1> %icmp to <8 x i16>
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ret <8 x i16> %sext
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}
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