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Add a new option, -fast-isel-verbose, that can be used with

Browse Source 
-fast-isel-no-abort to get a dump of all unhandled instructions,
without an abort.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56021 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-09-09 22:06:46 +00:00
parent 3ef2d60e95
commit 293d5f8bc0
1 changed files with 21 additions and 15 deletions
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36
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -60,6 +60,10 @@ static cl::opt<bool>
EnableFastISel("fast-isel", cl::Hidden, EnableFastISel("fast-isel", cl::Hidden,
cl::desc("Enable the experimental \"fast\" instruction selector")); cl::desc("Enable the experimental \"fast\" instruction selector"));
static cl::opt<bool> static cl::opt<bool>
EnableFastISelVerbose("fast-isel-verbose", cl::Hidden,
cl::desc("Enable verbose messages in the experimental \"fast\" "
"instruction selector"));
static cl::opt<bool>
DisableFastISelAbort("fast-isel-no-abort", cl::Hidden, DisableFastISelAbort("fast-isel-no-abort", cl::Hidden,
cl::desc("Use the SelectionDAGISel when \"fast\" instruction " cl::desc("Use the SelectionDAGISel when \"fast\" instruction "
"selection fails")); "selection fails"));
@ -743,12 +747,12 @@ void SelectionDAGISel::SelectAllBasicBlocks(Function &Fn, MachineFunction &MF) {
// feed PHI nodes in successor blocks. // feed PHI nodes in successor blocks.
if (isa<TerminatorInst>(BI)) if (isa<TerminatorInst>(BI))
if (!HandlePHINodesInSuccessorBlocksFast(LLVMBB, F)) { if (!HandlePHINodesInSuccessorBlocksFast(LLVMBB, F)) {
if (DisableFastISelAbort) if (EnableFastISelVerbose || !DisableFastISelAbort) {
break; cerr << "FastISel miss: ";
#ifndef NDEBUG BI->dump();
BI->dump(); }
#endif if (!DisableFastISelAbort)
assert(0 && "FastISel didn't handle a PHI in a successor"); assert(0 && "FastISel didn't handle a PHI in a successor");
} }
// First try normal tablegen-generated "fast" selection. // First try normal tablegen-generated "fast" selection.
@ -771,15 +775,17 @@ void SelectionDAGISel::SelectAllBasicBlocks(Function &Fn, MachineFunction &MF) {
continue; continue;
} }
if (!DisableFastISelAbort && // Otherwise, give up on FastISel for the rest of the block.
// For now, don't abort on non-conditional-branch terminators. // For now, be a little lenient about non-branch terminators.
(!isa<TerminatorInst>(BI) || isa<BranchInst>(BI))) { if (!isa<TerminatorInst>(BI) || isa<BranchInst>(BI)) {
// The "fast" selector couldn't handle something and bailed. if (EnableFastISelVerbose || !DisableFastISelAbort) {
// For the purpose of debugging, just abort. cerr << "FastISel miss: ";
#ifndef NDEBUG BI->dump();
BI->dump(); }
#endif if (!DisableFastISelAbort)
assert(0 && "FastISel didn't select the entire block"); // The "fast" selector couldn't handle something and bailed.
// For the purpose of debugging, just abort.
assert(0 && "FastISel didn't select the entire block");
} }
break; break;
} }