[PATCH] D63577: [clang][NewPM] Move EntryExitInstrumenterPass to the start of the pipeline

[Leonard Chan via Phabricator via cfe-commits]

leonardchan created this revision.
leonardchan added reviewers: chandlerc, phosek, echristo, serge-sans-paille.
leonardchan added a project: clang.

This fixes `CodeGen/x86_64-instrument-functions.c` when running under the new pass manager. The pass should go before any other pass to prevent `__cyg_profile_func_enter/exit()` from not being emitted by inlined functions.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D63577

Files:
  clang/lib/CodeGen/BackendUtil.cpp
  clang/test/CodeGen/x86_64-instrument-functions.c


Index: clang/test/CodeGen/x86_64-instrument-functions.c
===================================================================
--- clang/test/CodeGen/x86_64-instrument-functions.c
+++ clang/test/CodeGen/x86_64-instrument-functions.c
@@ -1,6 +1,9 @@
 // REQUIRES: x86-registered-target
-// RUN: %clang_cc1 -triple x86_64-unknown-unknown -S -finstrument-functions -O2 -o - %s | FileCheck %s
-// RUN: %clang_cc1 -triple x86_64-unknown-unknown -S -finstrument-functions-after-inlining -O2 -o - %s | FileCheck -check-prefix=NOINLINE %s
+// RUN: %clang_cc1 -fno-experimental-new-pass-manager -triple x86_64-unknown-unknown -S -finstrument-functions -O2 -o - %s | FileCheck %s
+// RUN: %clang_cc1 -fno-experimental-new-pass-manager -triple x86_64-unknown-unknown -S -finstrument-functions-after-inlining -O2 -o - %s | FileCheck -check-prefix=NOINLINE %s
+
+// RUN: %clang_cc1 -fexperimental-new-pass-manager -triple x86_64-unknown-unknown -S -finstrument-functions -O2 -o - %s | FileCheck %s
+// RUN: %clang_cc1 -fexperimental-new-pass-manager -triple x86_64-unknown-unknown -S -finstrument-functions-after-inlining -O2 -o - %s | FileCheck -check-prefix=NOINLINE %s
 
 // It's not so nice having asm tests in Clang, but we need to check that we set
 // up the pipeline correctly in order to have the instrumentation inserted.
Index: clang/lib/CodeGen/BackendUtil.cpp
===================================================================
--- clang/lib/CodeGen/BackendUtil.cpp
+++ clang/lib/CodeGen/BackendUtil.cpp
@@ -67,6 +67,7 @@
 #include "llvm/Transforms/Scalar/GVN.h"
 #include "llvm/Transforms/Utils.h"
 #include "llvm/Transforms/Utils/CanonicalizeAliases.h"
+#include "llvm/Transforms/Utils/EntryExitInstrumenter.h"
 #include "llvm/Transforms/Utils/NameAnonGlobals.h"
 #include "llvm/Transforms/Utils/SymbolRewriter.h"
 #include <memory>
@@ -1131,6 +1132,11 @@
       // configure the pipeline.
       PassBuilder::OptimizationLevel Level = mapToLevel(CodeGenOpts);
 
+      PB.registerPipelineStartEPCallback([](ModulePassManager &MPM) {
+        MPM.addPass(createModuleToFunctionPassAdaptor(
+            EntryExitInstrumenterPass(/*PostInlining=*/false)));
+      });
+
       // Register callbacks to schedule sanitizer passes at the appropriate part of
       // the pipeline.
       // FIXME: either handle asan/the remaining sanitizers or error out


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