https://bugs.llvm.org/show_bug.cgi?id=32207
Bug ID: 32207
Summary: -print-after-all banner not printed following r292442
Product: new-bugs
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: yaron.ke...@gmail.com
CC: llvm-bugs@lists.llvm.org, mehdi.am...@apple.com,
mehdi.am...@silkan.com
$ cat a.cpp
void foo() {}
$ clang -c -O a.cpp -mllvm -print-after-all |& grep unused
*** IR Dump After Remove unused exception handling info ***
$ clang -c -O a.cpp -mllvm -print-after-all |& grep inlining
$ clang -v
clang version 5.0.0 (trunk 294982)
the problem is static bool BannerPrinted is shared across *all*
PrintCallGraphPass passes so only the first pass (Remove unused exception
handling info) prints its banner.
To achieve one BannerPrinted per non-empty SCC, it should be non static local
to runOnSCC:
bool runOnSCC(CallGraphSCC &SCC) override {
bool BannerPrinted = false;
auto PrintBannerOnce = [&] () {
if (BannerPrinted)
return;
Out << Banner;
BannerPrinted = true;
};
for (CallGraphNode *CGN : SCC) {
if (CGN->getFunction()) {
if (isFunctionInPrintList(CGN->getFunction()->getName())) {
PrintBannerOnce();
CGN->getFunction()->print(Out);
}
} else if (llvm::isFunctionInPrintList("*")) {
PrintBannerOnce();
Out << "\nPrinting <null> Function\n";
}
}
return false;
}
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