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[X86] Teach disassembler to use %eip instead of %rip when 0x67 prefix is used on a rip-relative address. 

llvm-svn: 335413
This commit is contained in:
Craig Topper 2018-06-23 06:03:48 +00:00
parent 68d64e3859
commit 2545529034
2 changed files with 7 additions and 1 deletions
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4
llvm/lib/Target/X86/Disassembler/X86Disassembler.cpp
View File

@ -794,7 +794,9 @@ static bool translateRMMemory(MCInst &mcInst, InternalInstruction &insn,
tryAddingPcLoadReferenceComment(insn.startLocation +
insn.displacementOffset,
insn.displacement + pcrel, Dis);
baseReg = MCOperand::createReg(X86::RIP); // Section 2.2.1.6
// Section 2.2.1.6
baseReg = MCOperand::createReg(insn.addressSize == 4 ? X86::EIP :
X86::RIP);
}
else
baseReg = MCOperand::createReg(0);

4
llvm/test/MC/Disassembler/X86/x86-64.txt
View File

@ -588,3 +588,7 @@
# Make sure we ignore EVEX.X when modrm.rm encodes a k-register.
#CHECK: vpmovm2b %k0, %xmm0
0x62,0xb2,0x7e,0x08,0x28,0xc0
# 0x67 prefix prints %eip instead of %rip
#CHECK: addb %al, (%eip)
0x67,0x00,0x05,0x00,0x00,0x00,0x00