diff options
| -rw-r--r-- | js/src/jit/MIR.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/js/src/jit/MIR.h b/js/src/jit/MIR.h index 6ec05af76..b2e84322f 100644 --- a/js/src/jit/MIR.h +++ b/js/src/jit/MIR.h @@ -8272,7 +8272,10 @@ class MGetFirstDollarIndex : MUnaryInstruction(str) { setResultType(MIRType::Int32); - setMovable(); + + // Codegen assumes string length > 0 but that's not guaranteed in RegExp. + // Don't allow LICM to move this. + MOZ_ASSERT(!isMovable()); } public: |