[llvm] 0bc040e - [Support] Use llvm::bit_cast in getSwappedBytes (NFC)

[Kazu Hirata via llvm-commits]

Author: Kazu Hirata
Date: 2023-09-23T15:47:43-07:00
New Revision: 0bc040e1b439c1d8b8a40fea4a4b5bcd56efd5de

URL: https://github.com/llvm/llvm-project/commit/0bc040e1b439c1d8b8a40fea4a4b5bcd56efd5de
DIFF: https://github.com/llvm/llvm-project/commit/0bc040e1b439c1d8b8a40fea4a4b5bcd56efd5de.diff

LOG: [Support] Use llvm::bit_cast in getSwappedBytes (NFC)

Added: 
    

Modified: 
    llvm/include/llvm/Support/SwapByteOrder.h

Removed: 
    


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diff  --git a/llvm/include/llvm/Support/SwapByteOrder.h b/llvm/include/llvm/Support/SwapByteOrder.h
index 1bbc2e2f944ec58..43fa5347d6fe851 100644
--- a/llvm/include/llvm/Support/SwapByteOrder.h
+++ b/llvm/include/llvm/Support/SwapByteOrder.h
@@ -73,23 +73,11 @@ inline unsigned long long getSwappedBytes(unsigned long long C) { return llvm::b
 inline   signed long long getSwappedBytes(  signed long long C) { return llvm::byteswap(C); }
 
 inline float getSwappedBytes(float C) {
-  union {
-    uint32_t i;
-    float f;
-  } in, out;
-  in.f = C;
-  out.i = llvm::byteswap(in.i);
-  return out.f;
+  return llvm::bit_cast<float>(llvm::byteswap(llvm::bit_cast<uint32_t>(C)));
 }
 
 inline double getSwappedBytes(double C) {
-  union {
-    uint64_t i;
-    double d;
-  } in, out;
-  in.d = C;
-  out.i = llvm::byteswap(in.i);
-  return out.d;
+  return llvm::bit_cast<double>(llvm::byteswap(llvm::bit_cast<uint64_t>(C)));
 }
 
 template <typename T>