derek.holloway
7502bf64a4
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29 lines
1.2 KiB
LLVM
29 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt -S '-passes=separate-const-offset-from-gep<lower-gep>' < %s | FileCheck %s
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; These tests check that this pass does not incorrectly handle negative offsets.
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@c = internal constant [4 x i32] [i32 0, i32 1, i32 2, i32 3]
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; FIXME: We could optimize this case, but we don't currently. This test just
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; checks that we don't miscompile it.
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define i32 @sub_positive(i32 %a, i32 %b, ptr %ptr) {
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; CHECK-LABEL: define i32 @sub_positive
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; CHECK-SAME: (i32 [[A:%.*]], i32 [[B:%.*]], ptr [[PTR:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = sub nuw nsw i32 15, [[A]]
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; CHECK-NEXT: [[TMP1:%.*]] = sub nuw nsw i32 [[B]], [[TMP0]]
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; CHECK-NEXT: [[TMP2:%.*]] = zext i32 [[TMP1]] to i64
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; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds [4 x i32], ptr [[PTR]], i64 0, i64 [[TMP2]]
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; CHECK-NEXT: [[TMP4:%.*]] = load i32, ptr [[TMP3]], align 4
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; CHECK-NEXT: ret i32 [[TMP4]]
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;
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entry:
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%0 = sub nuw nsw i32 15, %a
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%1 = sub nuw nsw i32 %b, %0
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%2 = zext i32 %1 to i64
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%3 = getelementptr inbounds [4 x i32], ptr %ptr, i64 0, i64 %2
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%4 = load i32, ptr %3
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ret i32 %4
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}
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