[llvm] Added fix to enable constant folding that is missing for math library functions (scalbln , scalbn, ldexp) (PR #169893)

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git-clang-format --diff origin/main HEAD --extensions h,cpp -- llvm/include/llvm/Transforms/Utils/SimplifyLibCalls.h llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/include/llvm/Transforms/Utils/SimplifyLibCalls.h b/llvm/include/llvm/Transforms/Utils/SimplifyLibCalls.h
index 72b8f4b42..67d6bb133 100644
--- a/llvm/include/llvm/Transforms/Utils/SimplifyLibCalls.h
+++ b/llvm/include/llvm/Transforms/Utils/SimplifyLibCalls.h
@@ -216,7 +216,7 @@ private:
   Value *optimizeFdim(CallInst *CI, IRBuilderBase &B);
 
   Value *foldLdexp(CallInst *CI, IRBuilderBase &B);
-  
+
   // Wrapper for all floating point library call optimizations
   Value *optimizeFloatingPointLibCall(CallInst *CI, LibFunc Func,
                                       IRBuilderBase &B);
diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
index 702705ec0..809af8d3f 100644
--- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
@@ -2469,24 +2469,24 @@ Value *LibCallSimplifier::optimizePow(CallInst *Pow, IRBuilderBase &B) {
   return nullptr;
 }
 
-Value *LibCallSimplifier::foldLdexp(CallInst *CI,IRBuilderBase &B) {
+Value *LibCallSimplifier::foldLdexp(CallInst *CI, IRBuilderBase &B) {
 
-  Type*RequiredType = CI->getType();
-  if(!RequiredType->isFPOrFPVectorTy())
+  Type *RequiredType = CI->getType();
+  if (!RequiredType->isFPOrFPVectorTy())
     return nullptr;
 
-  Value*x = CI->getArgOperand(0); 
-  Value*exp = CI->getArgOperand(1);
-  Module*M = CI->getModule();
+  Value *x = CI->getArgOperand(0);
+  Value *exp = CI->getArgOperand(1);
+  Module *M = CI->getModule();
+
+  Function *ldexpDecl = llvm::Intrinsic::getOrInsertDeclaration(
+      M, Intrinsic::ldexp, {RequiredType, exp->getType()});
 
-  Function*ldexpDecl = llvm::Intrinsic::getOrInsertDeclaration(M, Intrinsic::ldexp,{RequiredType, exp->getType()});
-  
   CallInst *NewCall = B.CreateCall(ldexpDecl, {x, exp}, CI->getName());
   NewCall->setAttributes(CI->getAttributes());
   return copyFlags(*CI, NewCall);
 }
 
-
 Value *LibCallSimplifier::optimizeExp2(CallInst *CI, IRBuilderBase &B) {
   Module *M = CI->getModule();
   Function *Callee = CI->getCalledFunction();

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https://github.com/llvm/llvm-project/pull/169893