ed76074173
We already collect all instructions that need to be promoted. The custom isInstInList() implementation could provide incorrect results if a new use of the original pointer was introduced as part of promotion. This probably cannot happen with normal code, because of the pointer capture, but it can happen with a null pointer. Fixes https://github.com/llvm/llvm-project/issues/59324.
22 lines
498 B
LLVM
22 lines
498 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt -S -passes=licm < %s | FileCheck %s
|
|
|
|
define void @test(ptr %a) {
|
|
; CHECK-LABEL: @test(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[LOOP:%.*]]
|
|
; CHECK: loop:
|
|
; CHECK-NEXT: [[V:%.*]] = load i32, ptr null, align 4
|
|
; CHECK-NEXT: br label [[LOOP]]
|
|
;
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
store ptr null, ptr null
|
|
%p = load ptr, ptr null
|
|
%v = load i32, ptr %p
|
|
store i32 %v, ptr %a
|
|
br label %loop
|
|
}
|