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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.

llvm-svn: 56021
This commit is contained in:
Dan Gohman 2008-09-09 22:06:46 +00:00
parent f3a3ee6d01
commit 2799e1dc63
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,
cl::desc("Enable the experimental \"fast\" instruction selector"));
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,
cl::desc("Use the SelectionDAGISel when \"fast\" instruction "
"selection fails"));
@ -743,12 +747,12 @@ void SelectionDAGISel::SelectAllBasicBlocks(Function &Fn, MachineFunction &MF) {
// feed PHI nodes in successor blocks.
if (isa<TerminatorInst>(BI))
if (!HandlePHINodesInSuccessorBlocksFast(LLVMBB, F)) {
if (DisableFastISelAbort)
break;
#ifndef NDEBUG
BI->dump();
#endif
assert(0 && "FastISel didn't handle a PHI in a successor");
if (EnableFastISelVerbose || !DisableFastISelAbort) {
cerr << "FastISel miss: ";
BI->dump();
}
if (!DisableFastISelAbort)
assert(0 && "FastISel didn't handle a PHI in a successor");
}
// First try normal tablegen-generated "fast" selection.
@ -771,15 +775,17 @@ void SelectionDAGISel::SelectAllBasicBlocks(Function &Fn, MachineFunction &MF) {
continue;
}
if (!DisableFastISelAbort &&
// For now, don't abort on non-conditional-branch terminators.
(!isa<TerminatorInst>(BI) || isa<BranchInst>(BI))) {
// The "fast" selector couldn't handle something and bailed.
// For the purpose of debugging, just abort.
#ifndef NDEBUG
BI->dump();
#endif
assert(0 && "FastISel didn't select the entire block");
// Otherwise, give up on FastISel for the rest of the block.
// For now, be a little lenient about non-branch terminators.
if (!isa<TerminatorInst>(BI) || isa<BranchInst>(BI)) {
if (EnableFastISelVerbose || !DisableFastISelAbort) {
cerr << "FastISel miss: ";
BI->dump();
}
if (!DisableFastISelAbort)
// 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;
}