diff options
Diffstat (limited to 'lib/Target/AArch64/AArch64RedundantCopyElimination.cpp')
| -rw-r--r-- | lib/Target/AArch64/AArch64RedundantCopyElimination.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Target/AArch64/AArch64RedundantCopyElimination.cpp b/lib/Target/AArch64/AArch64RedundantCopyElimination.cpp index 4e65c0ab6011b..22c11c7276d25 100644 --- a/lib/Target/AArch64/AArch64RedundantCopyElimination.cpp +++ b/lib/Target/AArch64/AArch64RedundantCopyElimination.cpp @@ -167,6 +167,9 @@ AArch64RedundantCopyElimination::knownRegValInBlock( // CMP is an alias for SUBS with a dead destination register. case AArch64::SUBSWri: case AArch64::SUBSXri: { + // Sometimes the first operand is a FrameIndex. Bail if tht happens. + if (!PredI.getOperand(1).isReg()) + return None; MCPhysReg SrcReg = PredI.getOperand(1).getReg(); // Must not be a symbolic immediate. |