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[Debugify] Add a mode to opt to enable faster testing

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Opt's "-enable-debugify" mode adds an instance of Debugify at the
beginning of the pass pipeline, and an instance of CheckDebugify at the
end.

You can enable this mode with lit using: -Dopt="opt -enable-debugify".
Note that running test suites in this mode will result in many failures
due to strict FileCheck commands, etc.

It can be more useful to look for assertion failures which arise only
when Debugify is enabled, e.g to prove that we have (or do not have)
test coverage for some code path with debug info present.

Differential Revision: https://reviews.llvm.org/D41793

llvm-svn: 323256
This commit is contained in:
Vedant Kumar 2018-01-23 20:43:50 +00:00
parent b6d6831826
commit fe18056462
3 changed files with 21 additions and 0 deletions
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3
test/DebugInfo/debugify.ll
View File

@ -9,6 +9,9 @@
; RUN: opt -debugify -strip -check-debugify -S -o - < %s | \
; RUN: FileCheck %s -check-prefix=CHECK-FAIL
; RUN: opt -enable-debugify -strip -S -o - < %s | \
; RUN: FileCheck %s -check-prefix=CHECK-FAIL
; CHECK-LABEL: define void @foo
define void @foo() {
; CHECK: ret void, !dbg ![[RET1:.*]]

4
tools/opt/Debugify.cpp
View File

@ -204,6 +204,10 @@ struct CheckDebugifyPass : public ModulePass {
} // end anonymous namespace
ModulePass *createDebugifyPass() { return new DebugifyPass(); }
ModulePass *createCheckDebugifyPass() { return new CheckDebugifyPass(); }
char DebugifyPass::ID = 0;
static RegisterPass<DebugifyPass> X("debugify",
"Attach debug info to everything");

14
tools/opt/opt.cpp
View File

@ -203,6 +203,11 @@ QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet));
static cl::opt<bool>
AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
static cl::opt<bool> EnableDebugify(
"enable-debugify",
cl::desc(
"Start the pipeline with debugify and end it with check-debugify"));
static cl::opt<bool>
PrintBreakpoints("print-breakpoints-for-testing",
cl::desc("Print select breakpoints location for testing"));
@ -252,6 +257,9 @@ static cl::opt<std::string>
cl::desc("YAML output filename for pass remarks"),
cl::value_desc("filename"));
extern ModulePass *createDebugifyPass();
extern ModulePass *createCheckDebugifyPass();
static inline void addPass(legacy::PassManagerBase &PM, Pass *P) {
// Add the pass to the pass manager...
PM.add(P);
@ -570,6 +578,9 @@ int main(int argc, char **argv) {
Passes.add(createTargetTransformInfoWrapperPass(TM ? TM->getTargetIRAnalysis()
: TargetIRAnalysis()));
if (EnableDebugify)
Passes.add(createDebugifyPass());
std::unique_ptr<legacy::FunctionPassManager> FPasses;
if (OptLevelO0 || OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz ||
OptLevelO3) {
@ -715,6 +726,9 @@ int main(int argc, char **argv) {
if (!NoVerify && !VerifyEach)
Passes.add(createVerifierPass());
if (EnableDebugify)
Passes.add(createCheckDebugifyPass());
// In run twice mode, we want to make sure the output is bit-by-bit
// equivalent if we run the pass manager again, so setup two buffers and
// a stream to write to them. Note that llc does something similar and it