[llvm] [AMDGPU] Improve combining on v_ldexp (PR #190236)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- llvm/lib/Target/AMDGPU/AMDGPUCombinerHelper.cpp llvm/lib/Target/AMDGPU/AMDGPUCombinerHelper.h llvm/lib/Target/AMDGPU/AMDGPURegBankCombiner.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUCombinerHelper.h b/llvm/lib/Target/AMDGPU/AMDGPUCombinerHelper.h
index 73a53ef15..10c761ba7 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUCombinerHelper.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUCombinerHelper.h
@@ -48,7 +48,7 @@ public:
 };
 
 // Shared helper used by both
-// PostLegalizerCombiner and RegBankCombiner 
+// PostLegalizerCombiner and RegBankCombiner
 bool matchFmulWithSelectToFldexpImpl(
     MachineInstr &MI, MachineInstr &Sel,
     std::function<void(MachineIRBuilder &)> &MatchInfo,

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https://github.com/llvm/llvm-project/pull/190236