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[Debugify] Add a quiet mode to suppress warnings

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Suppressing warning output and module dumps significantly speeds up
fuzzing with `opt -debugify-each`.

llvm-svn: 334117
This commit is contained in:
Vedant Kumar 2018-06-06 19:05:41 +00:00
parent 5e33852f89
commit bdf8c7b72b
2 changed files with 19 additions and 15 deletions
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3
test/DebugInfo/debugify-each.ll
View File

@ -13,6 +13,9 @@
; Verify that debugify each can be safely used with piping
; RUN: opt -debugify-each -O1 < %s | opt -O2 -o /dev/null
; Check that the quiet mode emits no messages.
; RUN: opt -disable-output -debugify-quiet -debugify-each -O1 < %s 2>&1 | count 0
; Check that stripped textual IR compares equal before and after applying
; debugify.
; RUN: opt -O1 < %s -S -o - | \

31
tools/opt/Debugify.cpp
View File

@ -35,6 +35,11 @@ using namespace llvm;
namespace {
cl::opt<bool> Quiet("debugify-quiet",
cl::desc("Suppress verbose debugify output"));
raw_ostream &dbg() { return Quiet ? nulls() : errs(); }
bool isFunctionSkipped(Function &F) {
return F.isDeclaration() || !F.hasExactDefinition();
}
@ -57,7 +62,7 @@ bool applyDebugifyMetadata(Module &M,
StringRef Banner) {
// Skip modules with debug info.
if (M.getNamedMetadata("llvm.dbg.cu")) {
errs() << Banner << "Skipping module with debug info\n";
dbg() << Banner << "Skipping module with debug info\n";
return false;
}
@ -159,7 +164,7 @@ bool checkDebugifyMetadata(Module &M,
// Skip modules without debugify metadata.
NamedMDNode *NMD = M.getNamedMetadata("llvm.debugify");
if (!NMD) {
errs() << Banner << "Skipping module without debugify metadata\n";
dbg() << Banner << "Skipping module without debugify metadata\n";
return false;
}
@ -190,10 +195,10 @@ bool checkDebugifyMetadata(Module &M,
continue;
}
errs() << "ERROR: Instruction with empty DebugLoc in function ";
errs() << F.getName() << " --";
I.print(errs());
errs() << "\n";
dbg() << "ERROR: Instruction with empty DebugLoc in function ";
dbg() << F.getName() << " --";
I.print(dbg());
dbg() << "\n";
HasErrors = true;
}
@ -212,20 +217,16 @@ bool checkDebugifyMetadata(Module &M,
// Print the results.
for (unsigned Idx : MissingLines.set_bits())
errs() << "WARNING: Missing line " << Idx + 1 << "\n";
dbg() << "WARNING: Missing line " << Idx + 1 << "\n";
for (unsigned Idx : MissingVars.set_bits())
errs() << "ERROR: Missing variable " << Idx + 1 << "\n";
dbg() << "ERROR: Missing variable " << Idx + 1 << "\n";
HasErrors |= MissingVars.count() > 0;
errs() << Banner;
dbg() << Banner;
if (!NameOfWrappedPass.empty())
errs() << " [" << NameOfWrappedPass << "]";
errs() << ": " << (HasErrors ? "FAIL" : "PASS") << '\n';
if (HasErrors) {
errs() << "Module IR Dump\n";
M.print(errs(), nullptr, false);
}
dbg() << " [" << NameOfWrappedPass << "]";
dbg() << ": " << (HasErrors ? "FAIL" : "PASS") << '\n';
// Strip the Debugify Metadata if required.
if (Strip) {