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[PrintSCC] Fix printing a basic-block without a name

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Print a basic-block as an operand to handle the case where it has no
name.

Differential Revision: https://reviews.llvm.org/D80552
This commit is contained in:
Ehud Katz 2020-05-29 20:12:44 +03:00
parent 3e899294e4
commit c0f1b37259
2 changed files with 31 additions and 3 deletions
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27
test/Other/print-cfg-sccs.ll Normal file
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@ -0,0 +1,27 @@
; RUN: opt -print-cfg-sccs -disable-output < %s 2>&1 | FileCheck %s
; CHECK: SCCs for Function test in PostOrder:
; CHECK-NEXT: SCC #1 : %exit,
; CHECK-NEXT: SCC #2 : %0,
; CHECK-NEXT: SCC #3 : %3,
; CHECK-NEXT: SCC #4 : %2, %1,
; CHECK-NEXT: SCC #5 : %entry,
define void @test(i1 %cond) {
entry:
br i1 %cond, label %0, label %1
0:
br label %exit
1:
br label %2
2:
br i1 %cond, label %1, label %3
3:
br label %exit
exit:
ret void
}

7
tools/opt/PrintSCC.cpp
View File

@ -76,9 +76,10 @@ bool CFGSCC::runOnFunction(Function &F) {
for (scc_iterator<Function*> SCCI = scc_begin(&F); !SCCI.isAtEnd(); ++SCCI) { for (scc_iterator<Function*> SCCI = scc_begin(&F); !SCCI.isAtEnd(); ++SCCI) {
const std::vector<BasicBlock *> &nextSCC = *SCCI; const std::vector<BasicBlock *> &nextSCC = *SCCI;
errs() << "\nSCC #" << ++sccNum << " : "; errs() << "\nSCC #" << ++sccNum << " : ";
for (std::vector<BasicBlock*>::const_iterator I = nextSCC.begin(), for (BasicBlock *BB : nextSCC) {
E = nextSCC.end(); I != E; ++I) BB->printAsOperand(errs(), false);
errs() << (*I)->getName() << ", "; errs() << ", ";
}
if (nextSCC.size() == 1 && SCCI.hasCycle()) if (nextSCC.size() == 1 && SCCI.hasCycle())
errs() << " (Has self-loop)."; errs() << " (Has self-loop).";
} }