[clang] [llvm] [PowerPC] frontend get target feature from backend with cpu name (PR #137670)

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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions c,h,cpp -- clang/lib/Basic/Targets/PPC.cpp clang/test/CodeGenCXX/cxx11-thread-local-reference.cpp clang/test/Driver/aix-shared-lib-tls-model-opt.c clang/test/Driver/aix-small-local-exec-dynamic-tls.c clang/test/Driver/ppc-crbits.cpp clang/test/Driver/ppc-isa-features.cpp llvm/include/llvm/MC/MCSubtargetInfo.h llvm/include/llvm/TargetParser/PPCTargetParser.h llvm/lib/MC/MCSubtargetInfo.cpp llvm/lib/TargetParser/PPCTargetParser.cpp llvm/utils/TableGen/SubtargetEmitter.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Basic/Targets/PPC.cpp b/clang/lib/Basic/Targets/PPC.cpp
index 2a1024be1..b6ff8e11c 100644
--- a/clang/lib/Basic/Targets/PPC.cpp
+++ b/clang/lib/Basic/Targets/PPC.cpp
@@ -524,8 +524,8 @@ bool PPCTargetInfo::initFeatureMap(
       llvm::PPC::getPPCDefaultTargetFeatures(TheTriple,
                                              llvm::PPC::normalizeCPUName(CPU));
   if (FeaturesOpt.has_value())
-      Features = FeaturesOpt.value();
-  
+    Features = FeaturesOpt.value();
+
   if (!ppcUserFeaturesCheck(Diags, FeaturesVec))
     return false;
 
diff --git a/llvm/include/llvm/MC/MCSubtargetInfo.h b/llvm/include/llvm/MC/MCSubtargetInfo.h
index 287aaf591..87028271e 100644
--- a/llvm/include/llvm/MC/MCSubtargetInfo.h
+++ b/llvm/include/llvm/MC/MCSubtargetInfo.h
@@ -48,12 +48,12 @@ struct BasicSubtargetFeatureKV {
     return StringRef(Key) < StringRef(Other.Key);
   }
   BasicSubtargetFeatureKV(const char *Key, unsigned Value,
-                         FeatureBitArray Implies)
+                          FeatureBitArray Implies)
       : Key(Key), Value(Value), Implies(Implies) {}
 };
 
 struct SubtargetFeatureKV : BasicSubtargetFeatureKV {
-  const char *Desc;                    ///< Help descriptor
+  const char *Desc; ///< Help descriptor
   SubtargetFeatureKV(const char *Key, const char *Desc, unsigned Value,
                      FeatureBitArray Implies)
       : BasicSubtargetFeatureKV(Key, Value, Implies), Desc(Desc) {}
@@ -78,7 +78,7 @@ struct BasicSubtargetSubTypeKV {
 };
 
 struct SubtargetSubTypeKV : BasicSubtargetSubTypeKV {
-  FeatureBitArray TuneImplies;	       ///< K-V bit mask
+  FeatureBitArray TuneImplies; ///< K-V bit mask
   const MCSchedModel *SchedModel;
 };
 
diff --git a/llvm/utils/TableGen/SubtargetEmitter.cpp b/llvm/utils/TableGen/SubtargetEmitter.cpp
index be1409f65..4498a75d9 100644
--- a/llvm/utils/TableGen/SubtargetEmitter.cpp
+++ b/llvm/utils/TableGen/SubtargetEmitter.cpp
@@ -274,8 +274,9 @@ unsigned SubtargetEmitter::featureKeyValues(raw_ostream &OS,
 
   // Begin feature table.
   OS << "// Sorted (by key) array of values for CPU features.\n"
-     << "extern const llvm::" << (IsEmitBasic ? "Basic" : "") << "SubtargetFeatureKV "
-     << (IsEmitBasic ? "Basic" : "") << Target << "FeatureKV[] = {\n";
+     << "extern const llvm::" << (IsEmitBasic ? "Basic" : "")
+     << "SubtargetFeatureKV " << (IsEmitBasic ? "Basic" : "") << Target
+     << "FeatureKV[] = {\n";
 
   for (const Record *Feature : FeatureList) {
     // Next feature
@@ -357,8 +358,9 @@ unsigned SubtargetEmitter::cpuKeyValues(raw_ostream &OS,
 
   // Begin processor table.
   OS << "// Sorted (by key) array of values for CPU subtype.\n"
-     << "extern const llvm::" << (IsEmitBasic ? "Basic" : "")  <<   "SubtargetSubTypeKV "
-     << (IsEmitBasic ? "Basic" : "") << Target << "SubTypeKV[] = {\n";
+     << "extern const llvm::" << (IsEmitBasic ? "Basic" : "")
+     << "SubtargetSubTypeKV " << (IsEmitBasic ? "Basic" : "") << Target
+     << "SubTypeKV[] = {\n";
 
   for (const Record *Processor : ProcessorList) {
     StringRef Name = Processor->getValueAsString("Name");

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https://github.com/llvm/llvm-project/pull/137670