| Issue |
64740
|
| Summary |
AArch64 globalisel codegen clobbering return address on stack
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
mstorsjo
|
This is reduced from a failure in libc++'s testcase `std/utilities/charconv/charconv.to.chars/integral.pass.cpp` when run on an aarch64-mingw target.
```llvm
target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64-w64-windows-gnu"
%"struct.std::__1::integral_constant" = type { i8 }
; Function Attrs: mustprogress noinline nounwind optnone uwtable
define dso_local noundef i1 @_Z8_fits_inIcjNSt3__114numeric_limitsIcEEEbT0_NS0_17integral_constantIbLb0EEES5_z(i32 noundef %0, i8 %1, i8 %2, ...) {
%4 = alloca %"struct.std::__1::integral_constant", align 1
%5 = alloca %"struct.std::__1::integral_constant", align 1
%6 = alloca i32, align 4
%7 = getelementptr inbounds %"struct.std::__1::integral_constant", ptr %4, i32 0, i32 0
store i8 %1, ptr %7, align 1
%8 = getelementptr inbounds %"struct.std::__1::integral_constant", ptr %5, i32 0, i32 0
store i8 %2, ptr %8, align 1
store i32 %0, ptr %6, align 4
%9 = load i32, ptr %6, align 4
%10 = call noundef i8 @_ZNSt3__114numeric_limitsIcE3maxB7v180000Ev()
%11 = zext i8 %10 to i32
%12 = icmp ule i32 %9, %11
ret i1 %12
}
declare dso_local noundef i8 @_ZNSt3__114numeric_limitsIcE3maxB7v180000Ev()
```
```console
$ llc -O0 fitsin.ll -filetype asm -o -
```
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