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Add support for the inline asm constraint 'K'.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156282 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2012-05-07 05:46:29 +00:00
parent 5f9cccc509
commit f49f846eec
3 changed files with 33 additions and 0 deletions
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11
lib/Target/Mips/MipsISelLowering.cpp
View File

@ -3041,6 +3041,7 @@ MipsTargetLowering::getSingleConstraintMatchWeight(
break;
case 'I': // signed 16 bit immediate
case 'J': // integer zero
case 'K': // unsigned 16 bit immediate
if (isa<ConstantInt>(CallOperandVal))
weight = CW_Constant;
break;
@ -3113,6 +3114,16 @@ void MipsTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
}
}
return;
case 'K': // unsigned 16 bit immediate
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
EVT Type = Op.getValueType();
uint64_t Val = (uint64_t)C->getZExtValue();
if (isUInt<16>(Val)) {
Result = DAG.getTargetConstant(Val, Type);
break;
}
}
return;
}
if (Result.getNode()) {

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

@ -0,0 +1,16 @@
;
;This is a negative test. The constant value given for the constraint (K)
;is greater than 16 bits (0x00100000).
;
; 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 'K'
tail call i32 asm "addu $0,$1,$2", "=r,r,K"(i32 1024, i32 1048576) nounwind
ret i32 0
}

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

@ -21,6 +21,12 @@ entry:
; CHECK: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,$2\0A\09 ", "=r,r,J"(i32 7, i16 0) nounwind
; Now K with 64
; CHECK: #APP
; CHECK: addu ${{[0-9]+}},${{[0-9]+}},64
; CHECK: #NO_APP
tail call i16 asm sideeffect "addu $0,$1,$2\0A\09 ", "=r,r,K"(i16 7, i16 64) nounwind
ret i32 0
}