intel/llvm
1
0
Fork 0
mirror of https://github.com/intel/llvm.git synced 2026-01-19 09:31:59 +08:00
Code Issues Packages Projects Releases Wiki Activity

[AArch64][SME] Fix broken compiler check for SME2 support in compiler-rt (#121625)

Browse Source 
This compile time test uses inline asm with `.arch` directives to set
the target feature. It is however broken and always fails, since each
`asm()` construct in LLVM sets up a new AsmParser, and therefore the
`.arch` directive has no effect on later `asm()` contents. To fix this
we need to use a single inline `asm()` call with the entire code chunk
to emit contained inside.
This commit is contained in:
Amara Emerson
2025-01-06 01:37:56 -08:00
committed by GitHub
parent eff126501e
commit 3c8344f7ba
1 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
compiler-rt/cmake/builtin-config-ix.cmake
View File

@@ -43,9 +43,9 @@ asm(\"cas w0, w1, [x2]\");
builtin_check_c_compiler_source(COMPILER_RT_HAS_AARCH64_SME
"
void foo(void) __arm_streaming_compatible {
asm(\".arch armv9-a+sme2\");
asm(\"smstart\");
asm(\"ldr zt0, [sp]\");
asm(\".arch armv9-a+sme2\\n\"
\"smstart\\n\"
\"ldr zt0, [sp]\");
}
")