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69 lines
1.8 KiB
LLVM
69 lines
1.8 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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declare i8 @llvm.abs.i8(i8, i1)
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define i1 @abs_low_bit_set(i8 %x) {
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; CHECK-LABEL: @abs_low_bit_set(
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; CHECK-NEXT: ret i1 false
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;
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%xx = and i8 %x, 240
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%v = or i8 %xx, 4
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%abs = call i8 @llvm.abs.i8(i8 %v, i1 true)
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%and = and i8 %abs, 4
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%r = icmp eq i8 %and, 0
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ret i1 %r
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}
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define i1 @abs_unknown_low_bit_set_fail(i8 %x) {
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; CHECK-LABEL: @abs_unknown_low_bit_set_fail(
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; CHECK-NEXT: [[V:%.*]] = or i8 [[X:%.*]], 2
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; CHECK-NEXT: [[ABS:%.*]] = call i8 @llvm.abs.i8(i8 [[V]], i1 true)
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; CHECK-NEXT: [[AND:%.*]] = and i8 [[ABS]], 2
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; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[AND]], 0
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; CHECK-NEXT: ret i1 [[R]]
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;
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%v = or i8 %x, 2
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%abs = call i8 @llvm.abs.i8(i8 %v, i1 true)
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%and = and i8 %abs, 2
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%r = icmp eq i8 %and, 0
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ret i1 %r
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}
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define i1 @abs_negative(i8 %x) {
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; CHECK-LABEL: @abs_negative(
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; CHECK-NEXT: ret i1 false
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;
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%xx = and i8 %x, 240
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%v = or i8 %xx, 132
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%abs = call i8 @llvm.abs.i8(i8 %v, i1 true)
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%and = and i8 %abs, 8
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%r = icmp eq i8 %and, 0
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ret i1 %r
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}
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define i1 @abs_negative2(i8 %x) {
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; CHECK-LABEL: @abs_negative2(
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; CHECK-NEXT: ret i1 false
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;
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%v = or i8 %x, 131
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%abs = call i8 @llvm.abs.i8(i8 %v, i1 true)
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%and = and i8 %abs, 2
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%r = icmp eq i8 %and, 2
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ret i1 %r
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}
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define i1 @abs_negative_no_carry_info_fail(i8 %x) {
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; CHECK-LABEL: @abs_negative_no_carry_info_fail(
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; CHECK-NEXT: [[V:%.*]] = or i8 [[X:%.*]], -126
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; CHECK-NEXT: [[ABS:%.*]] = call i8 @llvm.abs.i8(i8 [[V]], i1 true)
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; CHECK-NEXT: [[AND:%.*]] = and i8 [[ABS]], 2
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; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[AND]], 0
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; CHECK-NEXT: ret i1 [[R]]
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;
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%v = or i8 %x, 130
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%abs = call i8 @llvm.abs.i8(i8 %v, i1 true)
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%and = and i8 %abs, 2
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%r = icmp eq i8 %and, 0
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ret i1 %r
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}
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