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Add support for the 'N' inline asm constraint. 

Patch by Jack Carter.

llvm-svn: 156284
This commit is contained in:
Eric Christopher 2012-05-07 05:46:43 +00:00
parent 1109b3406d
commit e07aa430b8
3 changed files with 34 additions and 0 deletions
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11
llvm/lib/Target/Mips/MipsISelLowering.cpp
View File

@ -3043,6 +3043,7 @@ MipsTargetLowering::getSingleConstraintMatchWeight(
case 'J': // integer zero
case 'K': // unsigned 16 bit immediate
case 'L': // signed 32 bit immediate where lower 16 bits are 0
case 'N': // immediate in the range of -65535 to -1 (inclusive)
if (isa<ConstantInt>(CallOperandVal))
weight = CW_Constant;
break;
@ -3135,6 +3136,16 @@ void MipsTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
}
}
return;
case 'N': // immediate in the range of -65535 to -1 (inclusive)
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
EVT Type = Op.getValueType();
int64_t Val = C->getSExtValue();
if ((Val >= -65535) && (Val <= -1)) {
Result = DAG.getTargetConstant(Val, Type);
break;
}
}
return;
}
if (Result.getNode()) {

17
llvm/test/CodeGen/Mips/inlineasm-cnstrnt-bad-N.ll Normal file
View File

@ -0,0 +1,17 @@
;This is a negative test. The constant value given for the constraint (N).
;immediate in the range of -65535 to -1 (inclusive).
;Our example uses the positive value 3.
;
; RUN: not llc -march=mipsel < %s 2> %t
; RUN: FileCheck --check-prefix=CHECK-ERRORS < %t %s
define i32 @main() nounwind {
entry:
;CHECK-ERRORS: error: invalid operand for inline asm constraint 'N'
tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,N"(i32 7, i32 3) nounwind
ret i32 0
}

6
llvm/test/CodeGen/Mips/inlineasm_constraint.ll
View File

@ -33,5 +33,11 @@ entry:
; CHECK: #NO_APP
tail call i32 asm sideeffect "add $0,$1,$3\0A\09", "=r,r,L,r"(i32 7, i32 1048576, i32 0) nounwind
; Now N with -3
; CHECK: #APP
; 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
ret i32 0
}