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Add support for the 'O' constraint.
Patch by Jack Carter. llvm-svn: 156285
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@ -3044,6 +3044,7 @@ MipsTargetLowering::getSingleConstraintMatchWeight(
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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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case 'N': // immediate in the range of -65535 to -1 (inclusive)
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case 'O': // signed 15 bit immediate (+- 16383)
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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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@ -3146,6 +3147,16 @@ 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 'O': // signed 15 bit immediate
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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 ((isInt<15>(Val))) {
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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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16
test/CodeGen/Mips/inlineasm-cnstrnt-bad-O.ll
Normal file
16
test/CodeGen/Mips/inlineasm-cnstrnt-bad-O.ll
Normal file
@ -0,0 +1,16 @@
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;
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;This is a negative test. The constant value given for the constraint (O).
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;signed 15 bit immediate (+- 16383).
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;Our example uses the positive value 16384.
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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 'O'
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tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,O"(i32 undef, i32 16384) nounwind
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ret i32 0
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}
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@ -39,5 +39,11 @@ entry:
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; CHECK: #NO_APP
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; CHECK: #NO_APP
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tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,N"(i32 7, i32 -3) nounwind
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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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; Now O 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,O"(i32 7, i16 -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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