[llvm] [BasicBlockSections] Introduce the basic block sections profile version 1. (PR #65506)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->

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``````````bash
git-clang-format --diff 46d5d264fc66a017bbd0182b2b5fcc0f3f23d3be 8a1893b39119166b6de06c1d182b967015518c3c -- llvm/include/llvm/CodeGen/BasicBlockSectionsProfileReader.h llvm/lib/CodeGen/BasicBlockSectionsProfileReader.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/CodeGen/BasicBlockSectionsProfileReader.cpp b/llvm/lib/CodeGen/BasicBlockSectionsProfileReader.cpp
index 30f0cbd25316..ef5f1251f532 100644
--- a/llvm/lib/CodeGen/BasicBlockSectionsProfileReader.cpp
+++ b/llvm/lib/CodeGen/BasicBlockSectionsProfileReader.cpp
@@ -86,14 +86,14 @@ Error BasicBlockSectionsProfileReader::ReadV1Profile() {
     switch (Specifier) {
     case '@':
       break;
-    case 'm':  // Module name speicifer.
+    case 'm': // Module name speicifer.
       if (Values.size() != 1) {
         return createProfileParseError(Twine("invalid module name value: '") +
                                        S + "'");
       }
       DIFilename = sys::path::remove_leading_dotslash(Values[0]);
       continue;
-    case 'f': {  // Function names specifier.
+    case 'f': { // Function names specifier.
       bool FunctionFound = any_of(Values, [&](StringRef Alias) {
         auto It = FunctionNameToDIFilename.find(Alias);
         // No match if this function name is not found in this module.
@@ -129,7 +129,7 @@ Error BasicBlockSectionsProfileReader::ReadV1Profile() {
       DIFilename = "";
       continue;
     }
-    case 'c':  // Basic block cluster specifier.
+    case 'c': // Basic block cluster specifier.
       // Skip the profile when we the profile iterator (FI) refers to the
       // past-the-end element.
       if (FI == ProgramBBClusterInfo.end())

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https://github.com/llvm/llvm-project/pull/65506