Fix encoding of Thumb1 B instructions with immediate offsets, which is necessary for round-tripping.
llvm-svn: 138834
diff --git a/llvm/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp b/llvm/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp
index a800b36..b798a3c 100644
--- a/llvm/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp
+++ b/llvm/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp
@@ -484,7 +484,10 @@
uint32_t ARMMCCodeEmitter::
getThumbBRTargetOpValue(const MCInst &MI, unsigned OpIdx,
SmallVectorImpl<MCFixup> &Fixups) const {
- return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_br, Fixups);
+ const MCOperand MO = MI.getOperand(OpIdx);
+ if (MO.isExpr())
+ return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_br, Fixups);
+ return (MO.getImm() >> 1);
}
/// getThumbBCCTargetOpValue - Return encoding info for Thumb branch target.