[LLVM] Make -use-constant-fp-for-fixed-length-splat the default. (#193264)

Author: paulwalker-arm

llvm/lib/IR/Constants.cpp

@@ -40,7 +40,7 @@ static cl::opt<bool> UseConstantIntForFixedLengthSplat(
     "use-constant-int-for-fixed-length-splat", cl::init(false), cl::Hidden,
     cl::desc("Use ConstantInt's native fixed-length vector splat support."));
 static cl::opt<bool> UseConstantFPForFixedLengthSplat(
-    "use-constant-fp-for-fixed-length-splat", cl::init(false), cl::Hidden,
+    "use-constant-fp-for-fixed-length-splat", cl::init(true), cl::Hidden,
     cl::desc("Use ConstantFP's native fixed-length vector splat support."));
 static cl::opt<bool> UseConstantIntForScalableSplat(
     "use-constant-int-for-scalable-splat", cl::init(false), cl::Hidden,