6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-09-30 19:55:11 +00:00
Code Issues Projects Releases Wiki Activity

Add a check in the ARM disassembler for NEON instructions that would

Browse Source 
reference registers past the end of the NEON register file, and report them
as invalid instead of asserting when trying to print them.  PR7746.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109933 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson 2010-07-30 23:27:59 +00:00
parent 1844b1a5a4
commit 70a4e3c532
1 changed files with 9 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
lib/Target/ARM/Disassembler/ARMDisassemblerCore.cpp
View File

@ -2248,9 +2248,10 @@ static bool DisassembleNLdSt0(MCInst &MI, unsigned Opcode, uint32_t insn,
// We have homogeneous NEON registers for Load/Store.
unsigned RegClass = 0;
bool DRegPair = UseDRegPair(Opcode);
// Double-spaced registers have increments of 2.
unsigned Inc = DblSpaced ? 2 : 1;
unsigned Inc = (DblSpaced || DRegPair) ? 2 : 1;
unsigned Rn = decodeRn(insn);
unsigned Rm = decodeRm(insn);
@ -2296,8 +2297,7 @@ static bool DisassembleNLdSt0(MCInst &MI, unsigned Opcode, uint32_t insn,
RegClass = OpInfo[OpIdx].RegClass;
while (OpIdx < NumOps && (unsigned)OpInfo[OpIdx].RegClass == RegClass) {
MI.addOperand(MCOperand::CreateReg(
getRegisterEnum(B, RegClass, Rd,
UseDRegPair(Opcode))));
getRegisterEnum(B, RegClass, Rd, DRegPair)));
Rd += Inc;
++OpIdx;
}
@ -2316,8 +2316,7 @@ static bool DisassembleNLdSt0(MCInst &MI, unsigned Opcode, uint32_t insn,
while (OpIdx < NumOps && (unsigned)OpInfo[OpIdx].RegClass == RegClass) {
MI.addOperand(MCOperand::CreateReg(
getRegisterEnum(B, RegClass, Rd,
UseDRegPair(Opcode))));
getRegisterEnum(B, RegClass, Rd, DRegPair)));
Rd += Inc;
++OpIdx;
}
@ -2355,6 +2354,11 @@ static bool DisassembleNLdSt0(MCInst &MI, unsigned Opcode, uint32_t insn,
}
}
// Accessing registers past the end of the NEON register file is not
// defined.
if (Rd > 32)
return false;
return true;
}