Add support for the 'N' inline asm constraint.
Patch by Jack Carter. llvm-svn: 156284
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@ -3043,6 +3043,7 @@ MipsTargetLowering::getSingleConstraintMatchWeight(
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case 'J': // integer zero
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case 'J': // integer zero
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case 'K': // unsigned 16 bit immediate
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case 'K': // unsigned 16 bit immediate
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case 'L': // signed 32 bit immediate where lower 16 bits are 0
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case 'L': // signed 32 bit immediate where lower 16 bits are 0
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case 'N': // immediate in the range of -65535 to -1 (inclusive)
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if (isa<ConstantInt>(CallOperandVal))
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if (isa<ConstantInt>(CallOperandVal))
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weight = CW_Constant;
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weight = CW_Constant;
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break;
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break;
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@ -3135,6 +3136,16 @@ void MipsTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
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}
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}
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}
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}
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return;
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return;
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case 'N': // immediate in the range of -65535 to -1 (inclusive)
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if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
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EVT Type = Op.getValueType();
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int64_t Val = C->getSExtValue();
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if ((Val >= -65535) && (Val <= -1)) {
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Result = DAG.getTargetConstant(Val, Type);
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break;
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}
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}
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return;
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}
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}
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if (Result.getNode()) {
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if (Result.getNode()) {
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@ -0,0 +1,17 @@
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;This is a negative test. The constant value given for the constraint (N).
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;immediate in the range of -65535 to -1 (inclusive).
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;Our example uses the positive value 3.
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;
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; RUN: not llc -march=mipsel < %s 2> %t
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; RUN: FileCheck --check-prefix=CHECK-ERRORS < %t %s
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define i32 @main() nounwind {
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entry:
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;CHECK-ERRORS: error: invalid operand for inline asm constraint 'N'
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tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,N"(i32 7, i32 3) nounwind
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ret i32 0
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}
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@ -33,5 +33,11 @@ entry:
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; CHECK: #NO_APP
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; CHECK: #NO_APP
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tail call i32 asm sideeffect "add $0,$1,$3\0A\09", "=r,r,L,r"(i32 7, i32 1048576, i32 0) nounwind
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tail call i32 asm sideeffect "add $0,$1,$3\0A\09", "=r,r,L,r"(i32 7, i32 1048576, i32 0) nounwind
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; Now N with -3
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; CHECK: #APP
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; CHECK: addi ${{[0-9]+}},${{[0-9]+}},-3
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; CHECK: #NO_APP
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tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,N"(i32 7, i32 -3) nounwind
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ret i32 0
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ret i32 0
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}
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}
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