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make the loop comment printer print out a much better structured

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output.  An example:

        .align  4, 0x90
LBB1_5:                                                     ## %while.cond3
                                                            ##   Parent Loop BB1_1 Depth=1
                                                            ## =>  This Loop Header: Depth=2
                                                            ##       Child Loop BB1_8 Depth 3
                                                            ##       Child Loop BB1_6 Depth 3

llvm-svn: 94225
This commit is contained in:
Chris Lattner 2010-01-22 21:43:28 +00:00
parent 639c136993
commit 92531ea22d
1 changed files with 23 additions and 15 deletions
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38
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
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@ -1845,17 +1845,30 @@ void AsmPrinter::EmitComments(const MachineInstr &MI) const {
}
}
/// PrintParentLoopComment - Print comments about parent loops of this one.
static void PrintParentLoopComment(raw_ostream &OS, const MachineLoop *Loop,
unsigned FunctionNumber) {
if (Loop == 0) return;
PrintParentLoopComment(OS, Loop->getParentLoop(), FunctionNumber);
OS.indent(Loop->getLoopDepth()*2)
<< "Parent Loop BB" << FunctionNumber << "_"
<< Loop->getHeader()->getNumber()
<< " Depth=" << Loop->getLoopDepth() << '\n';
}
/// PrintChildLoopComment - Print comments about child loops within
/// the loop for this basic block, with nesting.
static void PrintChildLoopComment(raw_ostream &OS, const MachineLoop *Loop,
unsigned FunctionNumber) {
// Add child loop information
for (MachineLoop::iterator CL = Loop->begin(), E = Loop->end();CL != E; ++CL){
MachineBasicBlock *Header = (*CL)->getHeader();
assert(Header && "No header for loop");
OS.indent(((*CL)->getLoopDepth()-1)*2)
OS.indent((*CL)->getLoopDepth()*2)
<< "Child Loop BB" << FunctionNumber << "_"
<< Header->getNumber() << " Depth " << (*CL)->getLoopDepth() << '\n';
<< (*CL)->getHeader()->getNumber() << " Depth " << (*CL)->getLoopDepth()
<< '\n';
PrintChildLoopComment(OS, *CL, FunctionNumber);
}
}
@ -1884,20 +1897,15 @@ void AsmPrinter::EmitComments(const MachineBasicBlock &MBB) const {
// parent loops.
raw_ostream &OS = OutStreamer.GetCommentOS();
PrintParentLoopComment(OS, Loop->getParentLoop(), getFunctionNumber());
OS << "=>";
OS.indent(Loop->getLoopDepth()*2-2);
OS << "This ";
if (Loop->empty())
OS << "Inner ";
OS << "Loop Header: Depth=" + Twine(Loop->getLoopDepth()) << '\n';
PrintChildLoopComment(OS, Loop, getFunctionNumber());
// Add parent loop information.
for (const MachineLoop *CurLoop = Loop->getParentLoop(); CurLoop;
CurLoop = CurLoop->getParentLoop()) {
MachineBasicBlock *Header = CurLoop->getHeader();
assert(Header && "No header for loop");
OS.indent(CurLoop->getLoopDepth()*2)
<< "Inside Loop BB" << getFunctionNumber() << "_"
<< Header->getNumber() << " Depth " << CurLoop->getLoopDepth() << '\n';
}
}