derek.holloway
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75 lines
2.0 KiB
LLVM
75 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
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define i32 @negate_nuw(i32 %x) {
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; CHECK-LABEL: @negate_nuw(
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; CHECK-NEXT: ret i32 0
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;
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%neg = sub nuw i32 0, %x
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ret i32 %neg
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}
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define <2 x i32> @negate_nuw_vec(<2 x i32> %x) {
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; CHECK-LABEL: @negate_nuw_vec(
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; CHECK-NEXT: ret <2 x i32> zeroinitializer
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;
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%neg = sub nuw <2 x i32> zeroinitializer, %x
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ret <2 x i32> %neg
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}
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define <2 x i32> @negate_nuw_vec_poison_elt(<2 x i32> %x) {
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; CHECK-LABEL: @negate_nuw_vec_poison_elt(
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; CHECK-NEXT: ret <2 x i32> zeroinitializer
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;
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%neg = sub nuw <2 x i32> <i32 0, i32 poison>, %x
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ret <2 x i32> %neg
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}
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define i8 @negate_zero_or_minsigned_nsw(i8 %x) {
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; CHECK-LABEL: @negate_zero_or_minsigned_nsw(
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; CHECK-NEXT: ret i8 0
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;
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%signbit = and i8 %x, 128
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%neg = sub nsw i8 0, %signbit
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ret i8 %neg
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}
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define <2 x i8> @negate_zero_or_minsigned_nsw_vec(<2 x i8> %x) {
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; CHECK-LABEL: @negate_zero_or_minsigned_nsw_vec(
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; CHECK-NEXT: ret <2 x i8> zeroinitializer
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;
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%signbit = shl <2 x i8> %x, <i8 7, i8 7>
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%neg = sub nsw <2 x i8> zeroinitializer, %signbit
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ret <2 x i8> %neg
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}
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define <2 x i8> @negate_zero_or_minsigned_nsw_vec_poison_elt(<2 x i8> %x) {
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; CHECK-LABEL: @negate_zero_or_minsigned_nsw_vec_poison_elt(
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; CHECK-NEXT: ret <2 x i8> zeroinitializer
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;
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%signbit = shl <2 x i8> %x, <i8 7, i8 7>
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%neg = sub nsw <2 x i8> <i8 poison, i8 0>, %signbit
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ret <2 x i8> %neg
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}
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define i8 @negate_zero_or_minsigned(i8 %x) {
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; CHECK-LABEL: @negate_zero_or_minsigned(
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; CHECK-NEXT: [[SIGNBIT:%.*]] = shl i8 [[X:%.*]], 7
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; CHECK-NEXT: ret i8 [[SIGNBIT]]
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;
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%signbit = shl i8 %x, 7
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%neg = sub i8 0, %signbit
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ret i8 %neg
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}
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define <2 x i8> @negate_zero_or_minsigned_vec(<2 x i8> %x) {
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; CHECK-LABEL: @negate_zero_or_minsigned_vec(
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; CHECK-NEXT: [[SIGNBIT:%.*]] = and <2 x i8> [[X:%.*]], splat (i8 -128)
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; CHECK-NEXT: ret <2 x i8> [[SIGNBIT]]
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;
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%signbit = and <2 x i8> %x, <i8 128, i8 128>
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%neg = sub <2 x i8> zeroinitializer, %signbit
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ret <2 x i8> %neg
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}
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