369a919514
The patch makes sure that the LastThrowing pointer does not point to any instruction deleted by call to DeleteDeadInstruction. While iterating through the instructions the pass maintains a pointer to the lastThrowing Instruction. A call to deleteDeadInstruction deletes a dead store and other instructions feeding the original dead instruction which also become dead. The instruction pointed by the lastThrowing pointer could also be deleted by the call to DeleteDeadInstruction and thus it becomes a dangling pointer. Because of this, we see an error in the next iteration. In the patch, we maintain a list of throwing instructions encountered previously and use the last non deleted throwing instruction from the container. Reviewers: fhahn, bcahoon, efriedma Reviewed By: fhahn Differential Revision: https://reviews.llvm.org/D65326
42 lines
1.2 KiB
LLVM
42 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -basicaa -dse -S | FileCheck %s
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declare i8* @_Znwj(i32) local_unnamed_addr
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declare void @foo() readnone
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define void @test1(i8** %ptr) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[VAL:%.*]] = inttoptr i64 23452 to i8*
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; CHECK-NEXT: store i8* [[VAL]], i8** [[PTR:%.*]]
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; CHECK-NEXT: ret void
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;
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%val = inttoptr i64 23452 to i8*
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store i8* %val, i8** %ptr
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%call = call i8* @_Znwj(i32 1)
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store i8* %call, i8** %ptr
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store i8* %val, i8** %ptr
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ret void
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}
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define void @test2(i8** %ptr, i8* %p1, i8* %p2) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[VAL:%.*]] = inttoptr i64 23452 to i8*
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; CHECK-NEXT: store i8* [[VAL]], i8** [[PTR:%.*]]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: store i8* [[P1:%.*]], i8** [[PTR]]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: store i8* [[VAL]], i8** [[PTR]]
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; CHECK-NEXT: ret void
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;
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%val = inttoptr i64 23452 to i8*
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store i8* %val, i8** %ptr
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call void @foo()
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store i8* %p1, i8** %ptr
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call void @foo()
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store i8* %p2, i8** %ptr
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%call = call i8* @_Znwj(i32 1)
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store i8* %call, i8** %ptr
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store i8* %val, i8** %ptr
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ret void
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}
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