[SPIR-V][NFC] More efficient getPaddedLen

[bwlodarcz]

Quick fix with small performance improvement for getPaddedLen function.

[llvmbot]

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

Author: None (bwlodarcz)

Changes

Quick fix with small performance improvement for getPaddedLen function.

---

Full diff: https://github.com/llvm/llvm-project/pull/105823.diff

1 Files Affected:

• (modified) llvm/lib/Target/SPIRV/SPIRVUtils.cpp (+1-2)

diff --git a/llvm/lib/Target/SPIRV/SPIRVUtils.cpp b/llvm/lib/Target/SPIRV/SPIRVUtils.cpp
index 927683ad7e32be..68f166d0bef4ea 100644
--- a/llvm/lib/Target/SPIRV/SPIRVUtils.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVUtils.cpp
@@ -44,8 +44,7 @@ static uint32_t convertCharsToWord(const StringRef &Str, unsigned i) {
 
 // Get length including padding and null terminator.
 static size_t getPaddedLen(const StringRef &Str) {
-  const size_t Len = Str.size() + 1;
-  return (Len % 4 == 0) ? Len : Len + (4 - (Len % 4));
+  return Str.size() + 4 & ~3;
 }
 
 void addStringImm(const StringRef &Str, MCInst &Inst) {

[github-actions]

✅ With the latest revision this PR passed the C/C++ code formatter.

[bwlodarcz]

@michalpaszkowski @VyacheslavLevytskyy @Keenuts Please review this quick fix. Thank you.