derek.holloway
7502bf64a4
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28 lines
894 B
LLVM
28 lines
894 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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;RUN: opt -passes=instcombine -S %s | FileCheck %s
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define i8 @fast_div_201(i8 %p) {
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; CHECK-LABEL: @fast_div_201(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[V3:%.*]] = zext i8 [[P:%.*]] to i16
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; CHECK-NEXT: [[V4:%.*]] = mul nuw nsw i16 [[V3]], 71
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; CHECK-NEXT: [[V5:%.*]] = lshr i16 [[V4]], 8
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; CHECK-NEXT: [[V6:%.*]] = trunc nuw nsw i16 [[V5]] to i8
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; CHECK-NEXT: [[V7:%.*]] = sub i8 [[P]], [[V6]]
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; CHECK-NEXT: [[V8:%.*]] = lshr i8 [[V7]], 1
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; CHECK-NEXT: [[V13:%.*]] = add nuw i8 [[V8]], [[V6]]
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; CHECK-NEXT: [[V14:%.*]] = lshr i8 [[V13]], 7
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; CHECK-NEXT: ret i8 [[V14]]
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;
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entry:
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%v3 = zext i8 %p to i16
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%v4 = mul i16 %v3, 71
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%v5 = lshr i16 %v4, 8
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%v6 = trunc i16 %v5 to i8
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%v7 = sub i8 %p, %v6
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%v8 = lshr i8 %v7, 1
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%v13 = add i8 %v6, %v8
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%v14 = lshr i8 %v13, 7
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ret i8 %v14
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}
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