[PowerPC][HTM] Fix disassembling buffer overflow for tabortdc and others

This was reported in https://bugs.llvm.org/show_bug.cgi?id=41751
llvm-mc aborted when disassembling tabortdc.

This patch try to clean up TM related DAGs.

* Fixes the problem by remove explicit output of cr0, and put it as implicit def.
* Update int_ppc_tbegin pattern to accommodate the implicit def of cr0.
* Update the TCHECK operand and int_ppc_tcheck accordingly.
* Add some builtin test and disassembly tests.
* Remove unused CRRC0/crrc0

Differential Revision: https://reviews.llvm.org/D61935

llvm-svn: 364544

1 files changed, 0 insertions, 6 deletions

diff --git a/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp b/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp
index 4814529c330..7a8af57961c 100644
--- a/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp
+++ b/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp
@@ -86,12 +86,6 @@ static DecodeStatus DecodeCRRCRegisterClass(MCInst &Inst, uint64_t RegNo,
   return decodeRegisterClass(Inst, RegNo, CRRegs);
 }
 
-static DecodeStatus DecodeCRRC0RegisterClass(MCInst &Inst, uint64_t RegNo,
-                                            uint64_t Address,
-                                            const void *Decoder) {
-  return decodeRegisterClass(Inst, RegNo, CRRegs);
-}
-
 static DecodeStatus DecodeCRBITRCRegisterClass(MCInst &Inst, uint64_t RegNo,
                                             uint64_t Address,
                                             const void *Decoder) {