[llvm] [IPO] Simplify code with StringMap::operator[] (NFC) (PR #112490)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-llvm-transforms

@llvm/pr-subscribers-pgo

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/112490.diff


1 Files Affected:

- (modified) llvm/include/llvm/Transforms/IPO/SampleProfileMatcher.h (+1-3) 


``````````diff
diff --git a/llvm/include/llvm/Transforms/IPO/SampleProfileMatcher.h b/llvm/include/llvm/Transforms/IPO/SampleProfileMatcher.h
index 076d91adfd1dea..4e757b29961817 100644
--- a/llvm/include/llvm/Transforms/IPO/SampleProfileMatcher.h
+++ b/llvm/include/llvm/Transforms/IPO/SampleProfileMatcher.h
@@ -201,9 +201,7 @@ class SampleProfileMatcher {
   void UpdateWithSalvagedProfiles();
 
   LocToLocMap &getIRToProfileLocationMap(const Function &F) {
-    auto Ret = FuncMappings.try_emplace(
-        FunctionSamples::getCanonicalFnName(F.getName()), LocToLocMap());
-    return Ret.first->second;
+    return FuncMappings[FunctionSamples::getCanonicalFnName(F.getName())];
   }
   void distributeIRToProfileLocationMap();
   void distributeIRToProfileLocationMap(FunctionSamples &FS);

``````````

</details>


https://github.com/llvm/llvm-project/pull/112490