[llvm] [AMDGPU] Use 1-iteration Newton-Raphson refinement for FP32 reciprocal. (PR #194716)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp b/llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp
index 201294310..985f09090 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp
@@ -924,11 +924,11 @@ bool AMDGPUCodeGenPrepareImpl::expandReciprocalNewtonRaphson(
     Value *Scale = nullptr;
     if (!HasFP32DenormalFlush) {
       Value *AbsD = B.CreateUnaryIntrinsic(Intrinsic::fabs, D);
-      Value *IsLarge = B.CreateFCmpOGT(
-          AbsD, ConstantFP::get(Ty, MaxNormalWithNormalRcp));
-      Scale = B.CreateSelect(
-          IsLarge, ConstantFP::get(Ty, LargeNormalScaleFactor),
-          ConstantFP::get(Ty, 1.0));
+      Value *IsLarge =
+          B.CreateFCmpOGT(AbsD, ConstantFP::get(Ty, MaxNormalWithNormalRcp));
+      Scale =
+          B.CreateSelect(IsLarge, ConstantFP::get(Ty, LargeNormalScaleFactor),
+                         ConstantFP::get(Ty, 1.0));
       DForRcp = B.CreateFMul(D, Scale);
     }
     Value *Y0 = B.CreateUnaryIntrinsic(Intrinsic::amdgcn_rcp, DForRcp);

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https://github.com/llvm/llvm-project/pull/194716