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Add support for the 'P' constraint.

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Patch by Jack Carter.

llvm-svn: 156292
This commit is contained in:
Eric Christopher 2012-05-07 06:25:02 +00:00
parent 98163678d4
commit 0f1a0afa75
3 changed files with 33 additions and 0 deletions
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11
lib/Target/Mips/MipsISelLowering.cpp
View File

@ -3045,6 +3045,7 @@ MipsTargetLowering::getSingleConstraintMatchWeight(
case 'L': // signed 32 bit immediate where lower 16 bits are 0 case 'L': // signed 32 bit immediate where lower 16 bits are 0
case 'N': // immediate in the range of -65535 to -1 (inclusive) case 'N': // immediate in the range of -65535 to -1 (inclusive)
case 'O': // signed 15 bit immediate (+- 16383) case 'O': // signed 15 bit immediate (+- 16383)
case 'P': // immediate in the range of 65535 to 1 (inclusive)
if (isa<ConstantInt>(CallOperandVal)) if (isa<ConstantInt>(CallOperandVal))
weight = CW_Constant; weight = CW_Constant;
break; break;
@ -3157,6 +3158,16 @@ void MipsTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
} }
} }
return; return;
case 'P': // immediate in the range of 1 to 65535 (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()) { if (Result.getNode()) {

16
test/CodeGen/Mips/inlineasm-cnstrnt-bad-P.ll Normal file
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@ -0,0 +1,16 @@
;
; This is a negative test. The constant value given for the constraint (P).
; A constant in the range of 1 to 655535 inclusive.
; Our example uses the positive value 655536.
;
; 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 'P'
tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,P"(i32 undef, i32 655536) nounwind
ret i32 0
}

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

@ -45,5 +45,11 @@ entry:
; CHECK: #NO_APP ; CHECK: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,O"(i32 7, i16 -3) nounwind tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,O"(i32 7, i16 -3) nounwind
; Now P with 65535
; CHECK: #APP
; CHECK: addi ${{[0-9]+}},${{[0-9]+}},65535
; CHECK: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,P"(i32 7, i32 65535) nounwind
ret i32 0 ret i32 0
} }