[llvm] [InstCombine] Simplify code with SmallMapVector::operator[] (NFC) (PR #113022)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-transforms

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/113022.diff


1 Files Affected:

- (modified) llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp (+1-2) 


``````````diff
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
index 72ebd9fbb6d9e5..d9d41e052a32a6 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -870,8 +870,7 @@ bool InstCombinerImpl::foldAllocaCmp(AllocaInst *Alloca) {
       if (ICmp && ICmp->isEquality() && getUnderlyingObject(*U) == Alloca) {
         // Collect equality icmps of the alloca, and don't treat them as
         // captures.
-        auto Res = ICmps.insert({ICmp, 0});
-        Res.first->second |= 1u << U->getOperandNo();
+        ICmps[ICmp] |= 1u << U->getOperandNo();
         return false;
       }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/113022