[compiler-rt] [compiler-rt] Only include asan on x86 architectures on Windows (PR #137173)

[Martin Storsjö via llvm-commits]

https://github.com/mstorsjo created https://github.com/llvm/llvm-project/pull/137173

This avoids building asan when targeting Windows on armv7 or aarch64. It is possible to build asan successfully for those configurations (since 5ea9dd8c7076270695a1d90b9c73718e7d95e0bf and 0c391133c9201ef29273554a1505ef855ce17668), but asan isn't functional there.

This change skips building asan for targets other than x86_32 and x86_64.

By excluding asan from the build, we fix the "check-ubsan" target for armv7 and aarch64 Windows. If asan is included in the build, an ubsan-asan configuration gets added to the tests, and as asan isn't functional for these targets, it produces a lot of test failures even when just trying to run "check-ubsan".

>From 25fa1270ea5efc472dc08d4df0d4b65b1a1ec6d6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin at martin.st>
Date: Mon, 21 Apr 2025 16:14:16 +0300
Subject: [PATCH] [compiler-rt] Only include asan on x86 architectures on
 Windows

This avoids building asan when targeting Windows on armv7 or
aarch64. It is possible to build asan successfully for those
configurations (since 5ea9dd8c7076270695a1d90b9c73718e7d95e0bf
and 0c391133c9201ef29273554a1505ef855ce17668), but asan isn't
functional there.

This change skips building asan for targets other than x86_32
and x86_64.

By excluding asan from the build, we fix the "check-ubsan" target
for armv7 and aarch64 Windows. If asan is included in the build,
an ubsan-asan configuration gets added to the tests, and as asan
isn't functional for these targets, it produces a lot of test failures
even when just trying to run "check-ubsan".
---
 compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake b/compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake
index 2683259e93e37..ca45d7bd2af7f 100644
--- a/compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake
+++ b/compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake
@@ -44,6 +44,10 @@ else()
   set(OS_NAME "${CMAKE_SYSTEM_NAME}")
 endif()
 
+if (OS_NAME MATCHES "Windows")
+  set(ALL_ASAN_SUPPORTED_ARCH ${X86} ${X86_64})
+endif()
+
 if(OS_NAME MATCHES "Linux")
   set(ALL_FUZZER_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64} ${S390X}
       ${RISCV64} ${LOONGARCH64})