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Change -fast-isel-no-abort to -fast-isel-abort, which now defaults
to being off by default. Also, add assertion checks to check that the various fast-isel-related command-line options are only used when -fast-isel itself is enabled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56029 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -64,9 +64,8 @@ EnableFastISelVerbose("fast-isel-verbose", cl::Hidden,
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cl::desc("Enable verbose messages in the experimental \"fast\" "
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"instruction selector"));
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static cl::opt<bool>
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DisableFastISelAbort("fast-isel-no-abort", cl::Hidden,
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cl::desc("Use the SelectionDAGISel when \"fast\" instruction "
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"selection fails"));
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EnableFastISelAbort("fast-isel-abort", cl::Hidden,
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cl::desc("Enable abort calls when \"fast\" instruction fails"));
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static cl::opt<bool>
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SchedLiveInCopies("schedule-livein-copies",
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cl::desc("Schedule copies of livein registers"),
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@ -287,6 +286,12 @@ void SelectionDAGISel::getAnalysisUsage(AnalysisUsage &AU) const {
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}
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bool SelectionDAGISel::runOnFunction(Function &Fn) {
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// Do some sanity-checking on the command-line options.
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assert((!EnableFastISelVerbose || EnableFastISel) &&
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"-fast-isel-verbose requires -fast-isel");
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assert((!EnableFastISelAbort || EnableFastISel) &&
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"-fast-isel-abort requires -fast-isel");
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// Get alias analysis for load/store combining.
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AA = &getAnalysis<AliasAnalysis>();
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@ -747,11 +752,11 @@ void SelectionDAGISel::SelectAllBasicBlocks(Function &Fn, MachineFunction &MF) {
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// feed PHI nodes in successor blocks.
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if (isa<TerminatorInst>(BI))
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if (!HandlePHINodesInSuccessorBlocksFast(LLVMBB, F)) {
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if (EnableFastISelVerbose || !DisableFastISelAbort) {
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if (EnableFastISelVerbose || EnableFastISelAbort) {
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cerr << "FastISel miss: ";
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BI->dump();
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}
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if (!DisableFastISelAbort)
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if (EnableFastISelAbort)
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assert(0 && "FastISel didn't handle a PHI in a successor");
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}
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@ -778,11 +783,11 @@ void SelectionDAGISel::SelectAllBasicBlocks(Function &Fn, MachineFunction &MF) {
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// Otherwise, give up on FastISel for the rest of the block.
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// For now, be a little lenient about non-branch terminators.
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if (!isa<TerminatorInst>(BI) || isa<BranchInst>(BI)) {
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if (EnableFastISelVerbose || !DisableFastISelAbort) {
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if (EnableFastISelVerbose || EnableFastISelAbort) {
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cerr << "FastISel miss: ";
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BI->dump();
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}
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if (!DisableFastISelAbort)
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if (EnableFastISelAbort)
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// The "fast" selector couldn't handle something and bailed.
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// For the purpose of debugging, just abort.
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assert(0 && "FastISel didn't select the entire block");
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