[clang] [rtsan][clang] NFC: Move rtsan init to addSanitizers (PR #119904)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang-codegen

Author: Chris Apple (cjappl)

<details>
<summary>Changes</summary>

This seems to pass tests and behaves as expected.

As suggested by @<!-- -->vitalybuka on #<!-- -->118989 

---
Full diff: https://github.com/llvm/llvm-project/pull/119904.diff


1 Files Affected:

- (modified) clang/lib/CodeGen/BackendUtil.cpp (+3-3) 


``````````diff
diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
index b3728c478772d3..2ef098172c01f5 100644
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -738,6 +738,9 @@ static void addSanitizers(const Triple &TargetTriple,
     if (LangOpts.Sanitize.has(SanitizerKind::NumericalStability))
       MPM.addPass(NumericalStabilitySanitizerPass());
 
+    if (LangOpts.Sanitize.has(SanitizerKind::Realtime))
+      MPM.addPass(RealtimeSanitizerPass());
+
     auto ASanPass = [&](SanitizerMask Mask, bool CompileKernel) {
       if (LangOpts.Sanitize.has(Mask)) {
         bool UseGlobalGC = asanUseGlobalsGC(TargetTriple, CodeGenOpts);
@@ -1023,9 +1026,6 @@ void EmitAssemblyHelper::RunOptimizationPipeline(
             FPM.addPass(BoundsCheckingPass());
           });
 
-    if (LangOpts.Sanitize.has(SanitizerKind::Realtime))
-      MPM.addPass(RealtimeSanitizerPass());
-
     // Don't add sanitizers if we are here from ThinLTO PostLink. That already
     // done on PreLink stage.
     if (!IsThinLTOPostLink) {

``````````

</details>


https://github.com/llvm/llvm-project/pull/119904