.Case("implicit-def", MIToken::kw_implicit_define)
.Case("dead", MIToken::kw_dead)
.Case("killed", MIToken::kw_killed)
+ .Case("undef", MIToken::kw_undef)
.Default(MIToken::Identifier);
}
kw_implicit_define,
kw_dead,
kw_killed,
+ kw_undef,
// Identifier tokens
Identifier,
bool isRegisterFlag() const {
return Kind == kw_implicit || Kind == kw_implicit_define ||
- Kind == kw_dead || Kind == kw_killed;
+ Kind == kw_dead || Kind == kw_killed || Kind == kw_undef;
}
bool is(TokenKind K) const { return Kind == K; }
case MIToken::kw_killed:
Flags |= RegState::Kill;
break;
+ case MIToken::kw_undef:
+ Flags |= RegState::Undef;
+ break;
// TODO: report an error when we specify the same flag more than once.
// TODO: parse the other register flags.
default:
// TODO: Parse subregister.
Dest = MachineOperand::CreateReg(
Reg, Flags & RegState::Define, Flags & RegState::Implicit,
- Flags & RegState::Kill, Flags & RegState::Dead);
+ Flags & RegState::Kill, Flags & RegState::Dead, Flags & RegState::Undef);
return false;
}
case MIToken::kw_implicit_define:
case MIToken::kw_dead:
case MIToken::kw_killed:
+ case MIToken::kw_undef:
case MIToken::underscore:
case MIToken::NamedRegister:
return parseRegisterOperand(Dest);
OS << "dead ";
if (Op.isKill())
OS << "killed ";
+ if (Op.isUndef())
+ OS << "undef ";
printReg(Op.getReg(), OS, TRI);
// TODO: Print sub register.
break;
--- /dev/null
+# RUN: llc -march=x86-64 -start-after branch-folder -stop-after branch-folder -o /dev/null %s | FileCheck %s
+# This test ensures that the MIR parser parses the 'undef' register flags
+# correctly.
+
+--- |
+
+ define i32 @compute(i32 %a) #0 {
+ body:
+ %c = mul i32 %a, 11
+ ret i32 %c
+ }
+
+ define i32 @foo(i32 %a) #0 {
+ entry:
+ %b = call i32 @compute(i32 %a)
+ ret i32 %b
+ }
+
+ attributes #0 = { "no-frame-pointer-elim"="false" }
+
+...
+---
+name: compute
+body:
+ - id: 0
+ name: body
+ instructions:
+ - '%eax = IMUL32rri8 %edi, 11, implicit-def %eflags'
+ - 'RETQ %eax'
+...
+---
+name: foo
+body:
+ - id: 0
+ name: entry
+ instructions:
+ # CHECK: - 'PUSH64r undef %rax
+ - 'PUSH64r undef %rax, implicit-def %rsp, implicit %rsp'
+ - 'CALL64pcrel32 @compute, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, implicit-def %eax'
+ - '%rdx = POP64r implicit-def %rsp, implicit %rsp'
+ - 'RETQ %eax'
+...