74 lines
3.1 KiB
LLVM
74 lines
3.1 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -dse -S %s | FileCheck %s
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declare void @use(i32)
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; Out-of-bounds stores can be considered killing any other stores to the same
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; object in the same BB, because they are UB and guaranteed to execute. Note
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; that cases in which the BB is exited through unwinding are handled separately
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; by DSE and the unwinding call will be considered as clobber.
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define i32 @test_out_of_bounds_store_local(i1 %c) {
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; CHECK-LABEL: @test_out_of_bounds_store_local(
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; CHECK-NEXT: [[D:%.*]] = alloca [1 x i32], align 4
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; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds [1 x i32], [1 x i32]* [[D]], i64 0, i64 0
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; CHECK-NEXT: [[LV1:%.*]] = load i32, i32* [[ARRAYIDX1]], align 4
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; CHECK-NEXT: call void @use(i32 [[LV1]])
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; CHECK-NEXT: ret i32 0
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;
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%d = alloca [1 x i32], align 4
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%arrayidx = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 0
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store i32 10, i32* %arrayidx, align 4
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%arrayidx.1 = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 1
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store i32 20, i32* %arrayidx.1, align 4
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%arrayidx1 = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 0
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%lv1 = load i32, i32* %arrayidx1, align 4
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call void @use(i32 %lv1)
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ret i32 0
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}
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; Make sure that out-of-bound stores are not considered killing other stores to
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; the same underlying object, if they are in different basic blocks. The
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; out-of-bounds store may not be executed.
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;
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; Test case from PR48279. FIXME.
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define i32 @test_out_of_bounds_store_nonlocal(i1 %c) {
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; CHECK-LABEL: @test_out_of_bounds_store_nonlocal(
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; CHECK-NEXT: [[D:%.*]] = alloca [1 x i32], align 4
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [1 x i32], [1 x i32]* [[D]], i64 0, i64 0
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; CHECK-NEXT: store i32 10, i32* [[ARRAYIDX]], align 4
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; CHECK-NEXT: br label [[FOR_INC:%.*]]
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; CHECK: for.inc:
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; CHECK-NEXT: br i1 [[C:%.*]], label [[FOR_BODY_1:%.*]], label [[FOR_END:%.*]]
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; CHECK: for.body.1:
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; CHECK-NEXT: ret i32 1
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; CHECK: for.end:
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; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds [1 x i32], [1 x i32]* [[D]], i64 0, i64 0
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; CHECK-NEXT: [[LV1:%.*]] = load i32, i32* [[ARRAYIDX1]], align 4
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; CHECK-NEXT: call void @use(i32 [[LV1]])
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; CHECK-NEXT: ret i32 0
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;
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%d = alloca [1 x i32], align 4
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br label %for.body
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for.body: ; preds = %for.cond
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%arrayidx = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 0
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store i32 10, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body
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br i1 %c, label %for.body.1, label %for.end
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for.body.1: ; preds = %for.inc
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%arrayidx.1 = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 1
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store i32 20, i32* %arrayidx.1, align 4
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ret i32 1
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for.end: ; preds = %for.inc
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%arrayidx1 = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 0
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%lv1 = load i32, i32* %arrayidx1, align 4
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call void @use(i32 %lv1)
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ret i32 0
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}
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