[llvm] [SPIRV] Avoid repeated map lookups. NFC (PR #125036)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-spir-v

Author: Craig Topper (topperc)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/125036.diff


1 Files Affected:

- (modified) llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h (+5-3) 


``````````diff
diff --git a/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h b/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h
index 79b5444cca205da..e6b8a381b718006 100644
--- a/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h
+++ b/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h
@@ -180,11 +180,13 @@ struct ModuleAnalysisInfo {
     if (RI == RegisterAliasTable[MF].end()) {
       return Register(0);
     }
-    return RegisterAliasTable[MF][Reg];
+    return RI->second;
   }
   bool hasRegisterAlias(const MachineFunction *MF, Register Reg) {
-    return RegisterAliasTable.find(MF) != RegisterAliasTable.end() &&
-           RegisterAliasTable[MF].find(Reg) != RegisterAliasTable[MF].end();
+    auto RI = RegisterAliasTable.find(MF);
+    if (RI == RegisterAliasTable.end())
+      return false;
+    return RI->second.find(Reg) != RI->second.end();
   }
   unsigned getNextID() { return MaxID++; }
   bool hasMBBRegister(const MachineBasicBlock &MBB) {

``````````

</details>


https://github.com/llvm/llvm-project/pull/125036