| Issue |
64721
|
| Summary |
[SROA] LLVM ERROR on atomic memory access
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
ericliuu
|
The following IR crashes with an LLVM ERROR when being optimized by the SROAPass:
```llvm
define i32 @foo() {
%A = alloca i1, align 1
%1 = load atomic volatile i32, ptr %A seq_cst, align 4
ret i32 %1
}
```
Here is the before and after from the SROAPass that causes the LLVM ERROR:
```llvm
*** IR Dump Before SROAPass on foo ***
define i32 @foo() {
%A = alloca i1, align 1
%1 = load atomic volatile i32, ptr %A seq_cst, align 4
ret i32 %1
}
*** IR Dump After SROAPass on foo ***
define i32 @foo() {
%A = alloca i1, align 1
%A.0. = load atomic volatile i1, ptr %A seq_cst, align 4
%A.0.load.ext = zext i1 %A.0. to i32
ret i32 %A.0.load.ext
}
atomic memory access' size must be byte-sized
i1 %A.0. = load atomic volatile i1, ptr %A seq_cst, align 4
LLVM ERROR: Broken function found, compilation aborted!
```
Here is the crash on godbolt: https://godbolt.org/z/3TYoYYYoq
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