// unless generating MIPS16 code.
// 'y' : Equivalent to r; retained for
// backwards compatibility.
- // 'f' : Floating Point registers.
+ // 'c' : A register suitable for use in an indirect
+ // jump. This will always be $25 for -mabicalls.
if (Constraint.size() == 1) {
switch (Constraint[0]) {
default : break;
case 'd':
case 'y':
case 'f':
+ case 'c':
return C_RegisterClass;
}
}
if (type->isFloatTy())
weight = CW_Register;
break;
+ case 'c': // $25 for indirect jumps
+ if (type->isIntegerTy())
+ weight = CW_SpecificReg;
+ break;
case 'I': // signed 16 bit immediate
case 'J': // integer zero
case 'K': // unsigned 16 bit immediate
return std::make_pair(0U, &Mips::FGR64RegClass);
return std::make_pair(0U, &Mips::AFGR64RegClass);
}
+ break;
+ case 'c': // register suitable for indirect jump
+ if (VT == MVT::i32)
+ return std::make_pair((unsigned)Mips::T9, &Mips::CPURegsRegClass);
+ assert(VT == MVT::i64 && "Unexpected type.");
+ return std::make_pair((unsigned)Mips::T9_64, &Mips::CPU64RegsRegClass);
}
}
return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
;CHECK: addi ${{[0-9]+}},${{[0-9]+}},3
;CHECK: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,n"(i32 7, i32 3) nounwind
-
+
+; Now c with 1024: make sure register $25 is picked
+; CHECK: #APP
+; CHECK: addi $25,${{[0-9]+}},1024
+; CHECK: #NO_APP
+ tail call i32 asm sideeffect "addi $0,$1,$2", "=c,c,I"(i32 4194304, i32 1024) nounwind
+
ret i32 0
}