[CodeGen] Move CodeGenPGO behind unique_ptr (NFC) (#142155)

The InstrProf headers are very expensive. Avoid including them in all of
CodeGen/ by moving the CodeGenPGO member behind a unqiue_ptr.

This reduces clang build time by 0.8%.

1 files changed, 12 insertions, 40 deletions

diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index 92e9ab8..bdd19f4 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -17,7 +17,6 @@
 #include "CGLoopInfo.h"
 #include "CGValue.h"
 #include "CodeGenModule.h"
-#include "CodeGenPGO.h"
 #include "EHScopeStack.h"
 #include "VarBypassDetector.h"
 #include "clang/AST/CharUnits.h"
@@ -90,6 +89,7 @@ class OSLogBufferLayout;
 
 namespace CodeGen {
 class CodeGenTypes;
+class CodeGenPGO;
 class CGCallee;
 class CGFunctionInfo;
 class CGBlockInfo;
@@ -1670,7 +1670,7 @@ private:
   llvm::Value *emitCondLikelihoodViaExpectIntrinsic(llvm::Value *Cond,
                                                     Stmt::Likelihood LH);
 
-  CodeGenPGO PGO;
+  std::unique_ptr<CodeGenPGO> PGO;
 
   /// Bitmap used by MC/DC to track condition outcomes of a boolean expression.
   Address MCDCCondBitmapAddr = Address::invalid();
@@ -1683,12 +1683,9 @@ private:
                                             uint64_t LoopCount) const;
 
 public:
-  auto getIsCounterPair(const Stmt *S) const { return PGO.getIsCounterPair(S); }
-
-  void markStmtAsUsed(bool Skipped, const Stmt *S) {
-    PGO.markStmtAsUsed(Skipped, S);
-  }
-  void markStmtMaybeUsed(const Stmt *S) { PGO.markStmtMaybeUsed(S); }
+  std::pair<bool, bool> getIsCounterPair(const Stmt *S) const;
+  void markStmtAsUsed(bool Skipped, const Stmt *S);
+  void markStmtMaybeUsed(const Stmt *S);
 
   /// Increment the profiler's counter for the given statement by \p StepV.
   /// If \p StepV is null, the default increment is 1.
@@ -1702,13 +1699,7 @@ public:
 
   /// Allocate a temp value on the stack that MCDC can use to track condition
   /// results.
-  void maybeCreateMCDCCondBitmap() {
-    if (isMCDCCoverageEnabled()) {
-      PGO.emitMCDCParameters(Builder);
-      MCDCCondBitmapAddr =
-          CreateIRTemp(getContext().UnsignedIntTy, "mcdc.addr");
-    }
-  }
+  void maybeCreateMCDCCondBitmap();
 
   bool isBinaryLogicalOp(const Expr *E) const {
     const BinaryOperator *BOp = dyn_cast<BinaryOperator>(E->IgnoreParens());
@@ -1716,43 +1707,24 @@ public:
   }
 
   /// Zero-init the MCDC temp value.
-  void maybeResetMCDCCondBitmap(const Expr *E) {
-    if (isMCDCCoverageEnabled() && isBinaryLogicalOp(E)) {
-      PGO.emitMCDCCondBitmapReset(Builder, E, MCDCCondBitmapAddr);
-      PGO.setCurrentStmt(E);
-    }
-  }
+  void maybeResetMCDCCondBitmap(const Expr *E);
 
   /// Increment the profiler's counter for the given expression by \p StepV.
   /// If \p StepV is null, the default increment is 1.
-  void maybeUpdateMCDCTestVectorBitmap(const Expr *E) {
-    if (isMCDCCoverageEnabled() && isBinaryLogicalOp(E)) {
-      PGO.emitMCDCTestVectorBitmapUpdate(Builder, E, MCDCCondBitmapAddr, *this);
-      PGO.setCurrentStmt(E);
-    }
-  }
+  void maybeUpdateMCDCTestVectorBitmap(const Expr *E);
 
   /// Update the MCDC temp value with the condition's evaluated result.
-  void maybeUpdateMCDCCondBitmap(const Expr *E, llvm::Value *Val) {
-    if (isMCDCCoverageEnabled()) {
-      PGO.emitMCDCCondBitmapUpdate(Builder, E, MCDCCondBitmapAddr, Val, *this);
-      PGO.setCurrentStmt(E);
-    }
-  }
+  void maybeUpdateMCDCCondBitmap(const Expr *E, llvm::Value *Val);
 
   /// Get the profiler's count for the given statement.
-  uint64_t getProfileCount(const Stmt *S) {
-    return PGO.getStmtCount(S).value_or(0);
-  }
+  uint64_t getProfileCount(const Stmt *S);
 
   /// Set the profiler's current count.
-  void setCurrentProfileCount(uint64_t Count) {
-    PGO.setCurrentRegionCount(Count);
-  }
+  void setCurrentProfileCount(uint64_t Count);
 
   /// Get the profiler's current count. This is generally the count for the most
   /// recently incremented counter.
-  uint64_t getCurrentProfileCount() { return PGO.getCurrentRegionCount(); }
+  uint64_t getCurrentProfileCount();
 
   /// See CGDebugInfo::addInstToCurrentSourceAtom.
   void addInstToCurrentSourceAtom(llvm::Instruction *KeyInstruction,