[PM] Add support for instrumented PGO in the new pass manager (clang-side)
Differential Revision: https://reviews.llvm.org/D29309
llvm-svn: 294961
diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
index 11c8cd0..a1ec52a 100644
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -61,6 +61,9 @@
namespace {
+// Default filename used for profile generation.
+static constexpr StringLiteral DefaultProfileGenName = "default_%m.profraw";
+
class EmitAssemblyHelper {
DiagnosticsEngine &Diags;
const HeaderSearchOptions &HSOpts;
@@ -448,7 +451,7 @@
if (!CodeGenOpts.InstrProfileOutput.empty())
PMBuilder.PGOInstrGen = CodeGenOpts.InstrProfileOutput;
else
- PMBuilder.PGOInstrGen = "default_%m.profraw";
+ PMBuilder.PGOInstrGen = DefaultProfileGenName;
}
if (CodeGenOpts.hasProfileIRUse())
PMBuilder.PGOInstrUse = CodeGenOpts.ProfileInstrumentUsePath;
@@ -775,7 +778,24 @@
return;
TheModule->setDataLayout(TM->createDataLayout());
- PassBuilder PB(TM.get());
+ PGOOptions PGOOpt;
+
+ // -fprofile-generate.
+ PGOOpt.RunProfileGen = CodeGenOpts.hasProfileIRInstr();
+ if (PGOOpt.RunProfileGen)
+ PGOOpt.ProfileGenFile = CodeGenOpts.InstrProfileOutput.empty() ?
+ DefaultProfileGenName : CodeGenOpts.InstrProfileOutput;
+
+ // -fprofile-use.
+ if (CodeGenOpts.hasProfileIRUse())
+ PGOOpt.ProfileUseFile = CodeGenOpts.ProfileInstrumentUsePath;
+
+ // Only pass a PGO options struct if -fprofile-generate or
+ // -fprofile-use were passed on the cmdline.
+ PassBuilder PB(TM.get(),
+ (PGOOpt.RunProfileGen ||
+ !PGOOpt.ProfileUseFile.empty()) ?
+ Optional<PGOOptions>(PGOOpt) : None);
LoopAnalysisManager LAM;
FunctionAnalysisManager FAM;