Fix Bug 9386 - ARM disassembler failed to disassemble conditional bx
Modified the patch to .td file supplied by Jyun-Yan You. Add a test case and
modified ARMDisassemblerCore.cpp a little bit.
llvm-svn: 131859
diff --git a/llvm/lib/Target/ARM/ARMInstrInfo.td b/llvm/lib/Target/ARM/ARMInstrInfo.td
index 59a9cd7..e9e11b0 100644
--- a/llvm/lib/Target/ARM/ARMInstrInfo.td
+++ b/llvm/lib/Target/ARM/ARMInstrInfo.td
@@ -1313,6 +1313,15 @@
let Inst{3-0} = dst;
}
+ // For disassembly only.
+ def BX_pred : AXI<(outs), (ins GPR:$dst, pred:$p), BrMiscFrm, IIC_Br,
+ "bx$p\t$dst", [/* pattern left blank */]>,
+ Requires<[IsARM, HasV4T]> {
+ bits<4> dst;
+ let Inst{27-4} = 0b000100101111111111110001;
+ let Inst{3-0} = dst;
+ }
+
// ARMV4 only
// FIXME: We would really like to define this as a vanilla ARMPat like:
// ARMPat<(brind GPR:$dst), (MOVr PC, GPR:$dst)>