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Add support for the 'O' constraint.

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Patch by Jack Carter.

llvm-svn: 156285
This commit is contained in:
Eric Christopher 2012-05-07 05:46:48 +00:00
parent 5e1efebf09
commit a6552ba637
3 changed files with 33 additions and 0 deletions
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11
lib/Target/Mips/MipsISelLowering.cpp
View File

@ -3044,6 +3044,7 @@ MipsTargetLowering::getSingleConstraintMatchWeight(
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)
case 'O': // signed 15 bit immediate (+- 16383)
if (isa<ConstantInt>(CallOperandVal))
weight = CW_Constant;
break;
@ -3146,6 +3147,16 @@ void MipsTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
}
}
return;
case 'O': // signed 15 bit immediate
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
EVT Type = Op.getValueType();
int64_t Val = C->getSExtValue();
if ((isInt<15>(Val))) {
Result = DAG.getTargetConstant(Val, Type);
break;
}
}
return;
}
if (Result.getNode()) {

16
test/CodeGen/Mips/inlineasm-cnstrnt-bad-O.ll Normal file
View File

@ -0,0 +1,16 @@
;
;This is a negative test. The constant value given for the constraint (O).
;signed 15 bit immediate (+- 16383).
;Our example uses the positive value 16384.
;
; 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 'O'
tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,O"(i32 undef, i32 16384) nounwind
ret i32 0
}

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

@ -39,5 +39,11 @@ entry:
; CHECK: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,N"(i32 7, i32 -3) nounwind
; Now O 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,O"(i32 7, i16 -3) nounwind
ret i32 0
}