implement rdar://8407928 - support for in/out with a missing "a" register.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113689 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/AsmParser/X86AsmParser.cpp b/lib/Target/X86/AsmParser/X86AsmParser.cpp
index a6b2b77..e6f0d95 100644
--- a/lib/Target/X86/AsmParser/X86AsmParser.cpp
+++ b/lib/Target/X86/AsmParser/X86AsmParser.cpp
@@ -811,7 +811,8 @@
if (getLexer().is(AsmToken::EndOfStatement))
Parser.Lex(); // Consume the EndOfStatement
- // FIXME: Hack to handle recognizing s{hr,ar,hl}? $1.
+ // FIXME: Hack to handle recognize s{hr,ar,hl} <op>, $1. Canonicalize to
+ // "shift <op>".
if ((Name.startswith("shr") || Name.startswith("sar") ||
Name.startswith("shl")) &&
Operands.size() == 3) {
@@ -823,6 +824,37 @@
}
}
+ // FIXME: Hack to handle recognize "in[bwl] <op>". Canonicalize it to
+ // "inb <op>, %al".
+ if ((Name == "inb" || Name == "inw" || Name == "inl") &&
+ Operands.size() == 2) {
+ unsigned Reg;
+ if (Name[2] == 'b')
+ Reg = MatchRegisterName("al");
+ else if (Name[2] == 'w')
+ Reg = MatchRegisterName("ax");
+ else
+ Reg = MatchRegisterName("eax");
+ SMLoc Loc = Operands.back()->getEndLoc();
+ Operands.push_back(X86Operand::CreateReg(Reg, Loc, Loc));
+ }
+
+ // FIXME: Hack to handle recognize "out[bwl] <op>". Canonicalize it to
+ // "outb %al, <op>".
+ if ((Name == "outb" || Name == "outw" || Name == "outl") &&
+ Operands.size() == 2) {
+ unsigned Reg;
+ if (Name[3] == 'b')
+ Reg = MatchRegisterName("al");
+ else if (Name[3] == 'w')
+ Reg = MatchRegisterName("ax");
+ else
+ Reg = MatchRegisterName("eax");
+ SMLoc Loc = Operands.back()->getEndLoc();
+ Operands.push_back(X86Operand::CreateReg(Reg, Loc, Loc));
+ std::swap(Operands[1], Operands[2]);
+ }
+
// FIXME: Hack to handle "f{mul*,add*,sub*,div*} $op, st(0)" the same as
// "f{mul*,add*,sub*,div*} $op"
if ((Name.startswith("fmul") || Name.startswith("fadd") ||
diff --git a/test/MC/AsmParser/X86/x86_instructions.s b/test/MC/AsmParser/X86/x86_instructions.s
index 9b535ea..b895de3 100644
--- a/test/MC/AsmParser/X86/x86_instructions.s
+++ b/test/MC/AsmParser/X86/x86_instructions.s
@@ -188,3 +188,15 @@
// CHECK: cmovneq %rbx, %rax
cmovnzq %rbx, %rax
+
+// rdar://8407928
+// CHECK: inb $127, %al
+// CHECK: inw %dx, %ax
+// CHECK: outb %al, $127
+// CHECK: outw %ax, %dx
+// CHECK: inl %dx, %eax
+inb $0x7f
+inw %dx
+outb $0x7f
+outw %dx
+inl %dx