derek.holloway
7502bf64a4
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26 lines
950 B
LLVM
26 lines
950 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; TODO: Test that ...
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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declare i32 @strcmp(ptr, ptr)
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@s9 = constant [10 x i8] c"123456789\00"
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; Fold strcmp(C ? s3 : s5, s3) to C ? 0 : 1.
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define i32 @fold_strcmp_s3_x_s4_s3(i1 %C) {
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; CHECK-LABEL: @fold_strcmp_s3_x_s4_s3(
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; CHECK-NEXT: [[PTR:%.*]] = select i1 [[C:%.*]], ptr getelementptr inbounds nuw (i8, ptr @s9, i64 6), ptr getelementptr inbounds nuw (i8, ptr @s9, i64 5)
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; CHECK-NEXT: [[CMP:%.*]] = call i32 @strcmp(ptr noundef nonnull dereferenceable(1) [[PTR]], ptr noundef nonnull dereferenceable(4) getelementptr inbounds nuw (i8, ptr @s9, i64 6))
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; CHECK-NEXT: ret i32 [[CMP]]
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;
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%ps3 = getelementptr [10 x i8], ptr @s9, i64 0, i64 6
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%ps4 = getelementptr [10 x i8], ptr @s9, i64 0, i64 5
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%ptr = select i1 %C, ptr %ps3, ptr %ps4
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%cmp = call i32 @strcmp(ptr %ptr, ptr %ps3)
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ret i32 %cmp
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}
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