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[IRPrinting] Improve module pass printer to work better with -filter-print-funcs

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Summary: Previously module pass printer pass prints the banner even when the module doesn't include any function provided with `-filter-print-funcs` option. This introduced a lot of noise, especailly with ThinLTO. This diff addresses the issue and makes the banner printed only when the module includes functions in `-filter-print-funcs` list.

Reviewers: fedor.sergeev

Subscribers: mehdi_amini, hiraditya, dexonsmith, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D66560

llvm-svn: 370849
This commit is contained in:
Taewook Oh 2019-09-04 08:08:58 +00:00
parent 8e49120f02
commit 62e029142d
2 changed files with 31 additions and 5 deletions
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18
lib/IR/IRPrintingPasses.cpp
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@ -26,14 +26,22 @@ PrintModulePass::PrintModulePass(raw_ostream &OS, const std::string &Banner,
ShouldPreserveUseListOrder(ShouldPreserveUseListOrder) {}
PreservedAnalyses PrintModulePass::run(Module &M, ModuleAnalysisManager &) {
if (!Banner.empty())
OS << Banner << "\n";
if (llvm::isFunctionInPrintList("*"))
if (llvm::isFunctionInPrintList("*")) {
if (!Banner.empty())
OS << Banner << "\n";
M.print(OS, nullptr, ShouldPreserveUseListOrder);
}
else {
for(const auto &F : M.functions())
if (llvm::isFunctionInPrintList(F.getName()))
bool BannerPrinted = false;
for(const auto &F : M.functions()) {
if (llvm::isFunctionInPrintList(F.getName())) {
if (!BannerPrinted && !Banner.empty()) {
OS << Banner << "\n";
BannerPrinted = true;
}
F.print(OS);
}
}
}
return PreservedAnalyses::all();
}

18
test/Other/module-pass-printer.ll Normal file
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@ -0,0 +1,18 @@
; Check pass name is only printed once.
; RUN: opt < %s 2>&1 -forceattrs -disable-output -print-after-all | FileCheck %s
; RUN: opt < %s 2>&1 -forceattrs -disable-output -print-after-all -filter-print-funcs=foo,bar | FileCheck %s
; Check pass name is not printed if a module doesn't include any function specified in -filter-print-funcs.
; RUN: opt < %s 2>&1 -forceattrs -disable-output -print-after-all -filter-print-funcs=baz | FileCheck %s -allow-empty -check-prefix=EMPTY
; CHECK: *** IR Dump After Force set function attributes ***
; CHECK-NOT: *** IR Dump After Force set function attributes ***
; EMPTY-NOT: *** IR Dump After Force set function attributes ***
define void @foo() {
ret void
}
define void @bar() {
ret void
}