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Function::getNumBlockIDs() should be used instead of Function::size() to set the upper limit on the block IDs since basic blocks might get removed (simplified away) after being initially numbered. Plus the test case, in which SelectionDAGBuilder::visitBr() calls llvm::MachineFunction::removeFromMBBNumbering(), which introduces the hole in numbering leading to an assert in llc (prior to the fix).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133113 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -39,7 +39,7 @@ void EdgeBundles::getAnalysisUsage(AnalysisUsage &AU) const {
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bool EdgeBundles::runOnMachineFunction(MachineFunction &mf) {
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MF = &mf;
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EC.clear();
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EC.grow(2 * MF->size());
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EC.grow(2 * MF->getNumBlockIDs());
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for (MachineFunction::const_iterator I = MF->begin(), E = MF->end(); I != E;
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++I) {
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81
test/CodeGen/Generic/edge-bundles-blockIDs.c
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81
test/CodeGen/Generic/edge-bundles-blockIDs.c
Normal file
@ -0,0 +1,81 @@
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; Make sure EdgeBoundles handles the case when the function size is less then
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; the number of block IDs.
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; RUN: llc -regalloc=fast < %s
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define void @WIn9UJ86JKdV4dM() nounwind {
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entry:
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br i1 undef, label %bb5.i1632, label %bb1.i1605
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bb1.i1605: ; preds = %entry
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br i1 undef, label %bb5.i73.i, label %bb3.i68.i
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bb3.i68.i: ; preds = %bb1.i1605
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unreachable
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bb5.i73.i: ; preds = %bb1.i1605
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br i1 undef, label %bb7.i79.i, label %bb6.i76.i
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bb6.i76.i: ; preds = %bb5.i73.i
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unreachable
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bb7.i79.i: ; preds = %bb5.i73.i
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br i1 undef, label %bb.i.i1608, label %bb8.i82.i
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bb8.i82.i: ; preds = %bb7.i79.i
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unreachable
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bb.i.i1608: ; preds = %bb.i.i1608, %bb7.i79.i
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br i1 undef, label %bb1.i.dhGetPoolFolder_dispatcher.preheader_crit_edge.i, label %bb.i.i1608
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bb1.i.dhGetPoolFolder_dispatcher.preheader_crit_edge.i: ; preds = %bb.i.i1608
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br label %dhGetPoolFolder_dispatcher.i
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bb3.i.i1610: ; preds = %bb8.i.i, %bb7.i.i1615
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br i1 undef, label %bb5.i.i1613, label %bb4.i.i1611
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bb4.i.i1611: ; preds = %bb3.i.i1610
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br label %bb5.i.i1613
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bb5.i.i1613: ; preds = %bb4.i.i1611, %bb3.i.i1610
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unreachable
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bb7.i.i1615: ; preds = %dhGetPoolFolder.exit.i
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br i1 undef, label %bb3.i.i1610, label %bb8.i.i
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bb8.i.i: ; preds = %bb7.i.i1615
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br i1 undef, label %bb3.i.i1610, label %bb9.i.i
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bb9.i.i: ; preds = %bb8.i.i
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br label %bb12.i.i
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bb12.i.i: ; preds = %bb12.i.i, %bb9.i.i
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br i1 undef, label %bb13.i.bb14.i_crit_edge.i, label %bb12.i.i
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bb13.i.bb14.i_crit_edge.i: ; preds = %bb12.i.i
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br i1 undef, label %bb25.i.i, label %bb20.i.i
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bb19.i.i: ; preds = %bb20.i.i
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br label %bb20.i.i
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bb20.i.i: ; preds = %bb19.i.i, %bb13.i.bb14.i_crit_edge.i
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%or.cond.i = or i1 undef, undef
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br i1 %or.cond.i, label %bb25.i.i, label %bb19.i.i
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bb25.i.i: ; preds = %bb20.i.i, %bb13.i.bb14.i_crit_edge.i
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unreachable
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bb5.i1632: ; preds = %entry
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unreachable
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dhGetPoolFolder_dispatcher.i: ; preds = %dhGetPoolFolder.exit.i, %bb1.i.dhGetPoolFolder_dispatcher.preheader_crit_edge.i
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br i1 undef, label %bb.i96.i, label %bb1.i102.i
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bb.i96.i: ; preds = %dhGetPoolFolder_dispatcher.i
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br label %dhGetPoolFolder.exit.i
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bb1.i102.i: ; preds = %dhGetPoolFolder_dispatcher.i
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br label %dhGetPoolFolder.exit.i
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dhGetPoolFolder.exit.i: ; preds = %bb1.i102.i, %bb.i96.i
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br i1 undef, label %bb7.i.i1615, label %dhGetPoolFolder_dispatcher.i
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}
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