52 lines
2.0 KiB
LLVM
52 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=instsimplify < %s -S | FileCheck %s
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define <4 x i1> @vec_reverse_known_bits(<4 x i8> %xx) {
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; CHECK-LABEL: @vec_reverse_known_bits(
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; CHECK-NEXT: ret <4 x i1> splat (i1 true)
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;
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%x = or <4 x i8> %xx, <i8 128, i8 128, i8 128, i8 128>
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%rev = call <4 x i8> @llvm.vector.reverse(<4 x i8> %x)
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%r = icmp slt <4 x i8> %rev, zeroinitializer
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ret <4 x i1> %r
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}
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define <4 x i1> @vec_reverse_known_bits_fail(<4 x i8> %xx) {
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; CHECK-LABEL: @vec_reverse_known_bits_fail(
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; CHECK-NEXT: [[X:%.*]] = or <4 x i8> [[XX:%.*]], <i8 -128, i8 -128, i8 -128, i8 127>
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; CHECK-NEXT: [[REV:%.*]] = call <4 x i8> @llvm.vector.reverse.v4i8(<4 x i8> [[X]])
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; CHECK-NEXT: [[R:%.*]] = icmp slt <4 x i8> [[REV]], zeroinitializer
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; CHECK-NEXT: ret <4 x i1> [[R]]
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;
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%x = or <4 x i8> %xx, <i8 128, i8 128, i8 128, i8 127>
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%rev = call <4 x i8> @llvm.vector.reverse(<4 x i8> %x)
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%r = icmp slt <4 x i8> %rev, zeroinitializer
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ret <4 x i1> %r
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}
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define i1 @vec_reverse_known_bits_demanded(<4 x i8> %xx) {
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; CHECK-LABEL: @vec_reverse_known_bits_demanded(
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; CHECK-NEXT: ret i1 true
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;
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%x = or <4 x i8> %xx, <i8 127, i8 55, i8 128, i8 123>
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%rev = call <4 x i8> @llvm.vector.reverse(<4 x i8> %x)
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%ele = extractelement <4 x i8> %rev, i64 1
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%r = icmp slt i8 %ele, 0
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ret i1 %r
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}
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define i1 @vec_reverse_known_bits_demanded_fail(<4 x i8> %xx) {
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; CHECK-LABEL: @vec_reverse_known_bits_demanded_fail(
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; CHECK-NEXT: [[X:%.*]] = or <4 x i8> [[XX:%.*]], <i8 127, i8 55, i8 -128, i8 123>
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; CHECK-NEXT: [[REV:%.*]] = call <4 x i8> @llvm.vector.reverse.v4i8(<4 x i8> [[X]])
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; CHECK-NEXT: [[ELE:%.*]] = extractelement <4 x i8> [[REV]], i64 2
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; CHECK-NEXT: [[R:%.*]] = icmp slt i8 [[ELE]], 0
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; CHECK-NEXT: ret i1 [[R]]
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;
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%x = or <4 x i8> %xx, <i8 127, i8 55, i8 128, i8 123>
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%rev = call <4 x i8> @llvm.vector.reverse(<4 x i8> %x)
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%ele = extractelement <4 x i8> %rev, i64 2
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%r = icmp slt i8 %ele, 0
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ret i1 %r
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}
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