[OSG 24291889] Protect against bad call to AsBranchInstr

pleath · pleath · commit d26afd47ac1f · 2019-12-19T17:07:15.000-08:00
diff --git a/lib/Backend/BackwardPass.cpp b/lib/Backend/BackwardPass.cpp
@@ -8432,7 +8432,7 @@ BackwardPass::ProcessBailOnNoProfile(IR::Instr *instr, BasicBlock *block)
                     // We already have one, we don't need a second.
                     instrCopy->Free();
                 }
-                else if (!predInstr->AsBranchInstr()->m_isSwitchBr)
+                else if (predInstr->IsBranchInstr() && !predInstr->AsBranchInstr()->m_isSwitchBr)
                 {
                     // Don't put a bailout in the middle of a switch dispatch sequence.
                     // The bytecode offsets are not in order, and it would lead to incorrect

Original file line number	Diff line number	Diff line change
`@@ -8432,7 +8432,7 @@ BackwardPass::ProcessBailOnNoProfile(IR::Instr instr, BasicBlock block)`
`8432`	`8432`	`// We already have one, we don't need a second.`
`8433`	`8433`	`instrCopy->Free();`
`8434`	`8434`	`}`
`8435`		`- else if (!predInstr->AsBranchInstr()->m_isSwitchBr)`
	`8435`	`+ else if (predInstr->IsBranchInstr() && !predInstr->AsBranchInstr()->m_isSwitchBr)`
`8436`	`8436`	`{`
`8437`	`8437`	`// Don't put a bailout in the middle of a switch dispatch sequence.`
`8438`	`8438`	`// The bytecode offsets are not in order, and it would lead to incorrect`