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NewPM: Improve/fix GCOV - which needs to run early in the pass pipeline. 

Using a new extension point in the new PM, register GCOV at the start of
the pipeline rather than the end.

llvm-svn: 323167
This commit is contained in:
David Blaikie 2018-01-23 01:25:24 +00:00
parent 0c64f5a2eb
commit ac904d0e3a
2 changed files with 13 additions and 3 deletions
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10
clang/lib/CodeGen/BackendUtil.cpp
View File

@ -909,6 +909,9 @@ void EmitAssemblyHelper::EmitAssemblyWithNewPassManager(
bool IsLTO = CodeGenOpts.PrepareForLTO;
if (CodeGenOpts.OptimizationLevel == 0) {
if (Optional<GCOVOptions> Options = getGCOVOptions(CodeGenOpts))
MPM.addPass(GCOVProfilerPass(*Options));
// Build a minimal pipeline based on the semantics required by Clang,
// which is just that always inlining occurs.
MPM.addPass(AlwaysInlinerPass());
@ -932,6 +935,10 @@ void EmitAssemblyHelper::EmitAssemblyWithNewPassManager(
[](FunctionPassManager &FPM, PassBuilder::OptimizationLevel Level) {
FPM.addPass(BoundsCheckingPass());
});
if (Optional<GCOVOptions> Options = getGCOVOptions(CodeGenOpts))
PB.registerPipelineStartEPCallback([Options](ModulePassManager &MPM) {
MPM.addPass(GCOVProfilerPass(*Options));
});
if (IsThinLTO) {
MPM = PB.buildThinLTOPreLinkDefaultPipeline(
@ -945,9 +952,6 @@ void EmitAssemblyHelper::EmitAssemblyWithNewPassManager(
CodeGenOpts.DebugPassManager);
}
}
if (Optional<GCOVOptions> Options = getGCOVOptions(CodeGenOpts)) {
MPM.addPass(GCOVProfilerPass(*Options));
}
}
// FIXME: We still use the legacy pass manager to do code generation. We

6
clang/test/CodeGen/code-coverage.c
View File

@ -3,9 +3,15 @@
// RUN: %clang_cc1 -emit-llvm -disable-red-zone -femit-coverage-data -coverage-notes-file=aaa.gcno -coverage-data-file=bbb.gcda -dwarf-column-info -debug-info-kind=limited -dwarf-version=4 %s -o - | FileCheck %s --check-prefix GCOV_FILE_INFO
// RUN: %clang_cc1 -emit-llvm-bc -o /dev/null -fexperimental-new-pass-manager -fdebug-pass-manager -femit-coverage-data %s 2>&1 | FileCheck --check-prefix=NEWPM %s
// RUN: %clang_cc1 -emit-llvm-bc -o /dev/null -fexperimental-new-pass-manager -fdebug-pass-manager -femit-coverage-data -O3 %s 2>&1 | FileCheck --check-prefix=NEWPM-O3 %s
// NEWPM-NOT: Running pass
// NEWPM: Running pass: GCOVProfilerPass
// NEWPM-O3-NOT: Running pass
// NEWPM-O3: Running pass: ForceFunctionAttrsPass
// NEWPM-O3: Running pass: GCOVProfilerPass
int test1(int a) {
switch (a % 2) {