forked from OSchip/llvm-project
41 lines
1.4 KiB
LLVM
41 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=aggressive-instcombine -S | FileCheck %s
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define void @trunc_one_add(i16* %a, i8 %b) {
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; CHECK-LABEL: @trunc_one_add(
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; CHECK-NEXT: [[ZEXT:%.*]] = zext i8 [[B:%.*]] to i16
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; CHECK-NEXT: [[SHR:%.*]] = lshr i16 [[ZEXT]], 1
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; CHECK-NEXT: [[ADD:%.*]] = add i16 [[ZEXT]], [[SHR]]
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; CHECK-NEXT: store i16 [[ADD]], i16* [[A:%.*]], align 2
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; CHECK-NEXT: ret void
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;
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%zext = zext i8 %b to i32
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%shr = lshr i32 %zext, 1
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%add = add nsw i32 %zext, %shr
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%trunc = trunc i32 %add to i16
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store i16 %trunc, i16* %a, align 2
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ret void
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}
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define void @trunc_two_adds(i16* %a, i8 %b, i8 %c) {
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; CHECK-LABEL: @trunc_two_adds(
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; CHECK-NEXT: [[ZEXT1:%.*]] = zext i8 [[B:%.*]] to i16
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; CHECK-NEXT: [[ZEXT2:%.*]] = zext i8 [[C:%.*]] to i16
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; CHECK-NEXT: [[ADD1:%.*]] = add i16 [[ZEXT1]], [[ZEXT2]]
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; CHECK-NEXT: [[SHR1:%.*]] = lshr i16 [[ADD1]], 1
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; CHECK-NEXT: [[ADD2:%.*]] = add i16 [[ADD1]], [[SHR1]]
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; CHECK-NEXT: [[SHR2:%.*]] = lshr i16 [[ADD2]], 2
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; CHECK-NEXT: store i16 [[SHR2]], i16* [[A:%.*]], align 2
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; CHECK-NEXT: ret void
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;
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%zext1 = zext i8 %b to i32
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%zext2 = zext i8 %c to i32
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%add1 = add nuw nsw i32 %zext1, %zext2
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%shr1 = lshr i32 %add1, 1
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%add2 = add nuw nsw i32 %add1, %shr1
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%shr2 = lshr i32 %add2, 2
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%trunc = trunc i32 %shr2 to i16
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store i16 %trunc, i16* %a, align 2
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ret void
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}
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