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Support the 'J' constraint.

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Patch by Jack Carter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156280 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2012-05-07 03:13:42 +00:00
parent 50ab03954e
commit e5076d484b
3 changed files with 33 additions and 0 deletions
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11
lib/Target/Mips/MipsISelLowering.cpp
View File

@ -3040,6 +3040,7 @@ MipsTargetLowering::getSingleConstraintMatchWeight(
weight = CW_Register;
break;
case 'I': // signed 16 bit immediate
case 'J': // integer zero
if (isa<ConstantInt>(CallOperandVal))
weight = CW_Constant;
break;
@ -3102,6 +3103,16 @@ void MipsTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
}
}
return;
case 'J': // integer zero
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
EVT Type = Op.getValueType();
int64_t Val = C->getZExtValue();
if (Val == 0) {
Result = DAG.getTargetConstant(0, Type);
break;
}
}
return;
}
if (Result.getNode()) {

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

@ -0,0 +1,16 @@
;
;This is a negative test. The constant value given for the constraint (J)
;is non-zero (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 'J'
tail call i32 asm "addi $0,$1,$2", "=r,r,J"(i32 1024, i32 3) nounwind
ret i32 0
}

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

@ -15,6 +15,12 @@ entry:
; CHECK: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,I"(i32 7, i32 -3) nounwind
; Now J with 0
; CHECK: #APP
; CHECK: addi ${{[0-9]+}},${{[0-9]+}},0
; CHECK: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,$2\0A\09 ", "=r,r,J"(i32 7, i16 0) nounwind
ret i32 0
}