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Support x86 specific inline asm modifier 'J'.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56483 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-09-22 23:57:37 +00:00
parent 869aed7d83
commit 364091e090
2 changed files with 16 additions and 4 deletions
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8
lib/Target/X86/X86ISelLowering.cpp
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@ -7080,6 +7080,14 @@ void X86TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
}
}
return;
case 'J':
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
if (C->getZExtValue() <= 63) {
Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
break;
}
}
return;
case 'N':
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
if (C->getZExtValue() <= 255) {

12
test/CodeGen/X86/inline-asm.ll
View File

@ -1,21 +1,25 @@
; RUN: llvm-as < %s | llc -march=x86
define i32 @test1() {
define i32 @test1() nounwind {
; Dest is AX, dest type = i32.
%tmp4 = call i32 asm sideeffect "FROB $0", "={ax}"()
ret i32 %tmp4
}
define void @test2(i32 %V) {
define void @test2(i32 %V) nounwind {
; input is AX, in type = i32.
call void asm sideeffect "FROB $0", "{ax}"(i32 %V)
ret void
}
define void @test3() {
define void @test3() nounwind {
; FP constant as a memory operand.
tail call void asm sideeffect "frob $0", "m"( float 0x41E0000000000000)
ret void
}
define void @test4() nounwind {
; J means a constant in range 0 to 63.
tail call void asm sideeffect "bork $0", "J"(i32 37) nounwind
ret void
}