[compiler-rt] [compiler-rt] Allow running tests without installing first (PR #83088)

[Alexander Richardson via llvm-commits]

https://github.com/arichardson updated https://github.com/llvm/llvm-project/pull/83088

>From 3c41df9f8fd00d86fe500d9b67e51d15a690209b Mon Sep 17 00:00:00 2001
From: Alex Richardson <alexrichardson at google.com>
Date: Mon, 26 Feb 2024 16:59:08 -0800
Subject: [PATCH] =?UTF-8?q?[=F0=9D=98=80=F0=9D=97=BD=F0=9D=97=BF]=20change?=
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Created using spr 1.3.4

[skip ci]
---
 compiler-rt/cmake/Modules/CompilerRTCompile.cmake | 7 ++++++-
 compiler-rt/test/dfsan/reaches_function.c         | 4 ++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/compiler-rt/cmake/Modules/CompilerRTCompile.cmake b/compiler-rt/cmake/Modules/CompilerRTCompile.cmake
index 64e7acb9afd833..8c804acb44ae4d 100644
--- a/compiler-rt/cmake/Modules/CompilerRTCompile.cmake
+++ b/compiler-rt/cmake/Modules/CompilerRTCompile.cmake
@@ -70,9 +70,14 @@ function(clang_compile object_file source)
   if (TARGET CompilerRTUnitTestCheckCxx)
     list(APPEND SOURCE_DEPS CompilerRTUnitTestCheckCxx)
   endif()
+  string(REGEX MATCH "[.](cc|cpp)$" is_cxx ${source_rpath})
+  if (is_cxx)
+    set(compiler ${COMPILER_RT_TEST_COMPILER})
+  else()
+    set(compiler ${COMPILER_RT_TEST_CXX_COMPILER})
+  endif()
   if(COMPILER_RT_STANDALONE_BUILD)
     # Only add global flags in standalone build.
-    string(REGEX MATCH "[.](cc|cpp)$" is_cxx ${source_rpath})
     if(is_cxx)
       string(REPLACE " " ";" global_flags "${CMAKE_CXX_FLAGS}")
     else()
diff --git a/compiler-rt/test/dfsan/reaches_function.c b/compiler-rt/test/dfsan/reaches_function.c
index 9e2bcee935b2ac..afcd08cee76a0e 100644
--- a/compiler-rt/test/dfsan/reaches_function.c
+++ b/compiler-rt/test/dfsan/reaches_function.c
@@ -32,7 +32,7 @@ void my_dfsan_reaches_function_callback(dfsan_label label, dfsan_origin origin,
 __attribute__((noinline)) uint64_t add(uint64_t *a, uint64_t *b) {
 
   return *a + *b;
-  // CHECK: {{.*}}compiler-rt/test/dfsan/reaches_function.c:[[# @LINE - 1]] add.dfsan
+  // CHECK: test/dfsan/reaches_function.c:[[# @LINE - 1]] add.dfsan
   // CHECK-ORIGIN-TRACKING: Origin value: 0x10000002, Taint value was stored to memory at
   // CHECK-ORIGIN-TRACKING: #0 {{.*}} in add.dfsan {{.*}}compiler-rt/test/dfsan/reaches_function.c:[[# @LINE - 3]]:{{.*}}
   // CHECK-ORIGIN-TRACKING: Origin value: 0x1, Taint value was created at
@@ -54,7 +54,7 @@ int main(int argc, char *argv[]) {
 
   dfsan_set_label(8, &a, sizeof(a));
   uint64_t c = add(&a, &b);
-  // CHECK: {{.*}}compiler-rt/test/dfsan/reaches_function.c:[[# @LINE - 1]] main
+  // CHECK: test/dfsan/reaches_function.c:[[# @LINE - 1]] main
   // CHECK-ORIGIN-TRACKING: Origin value: 0x10000002, Taint value was stored to memory at
   // CHECK-ORIGIN-TRACKING: #0 {{.*}} in add.dfsan {{.*}}compiler-rt/test/dfsan/reaches_function.c:{{.*}}
   // CHECK-ORIGIN-TRACKING: Origin value: 0x1, Taint value was created at