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InstSelectSimple.cpp: First draft of visitCallInst method, handling
 int/float args.
X86InstrInfo.def: Add entries for CALL with 32-bit pc relative arg, and
 PUSH with 32-bit reg arg.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4838 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Brian Gaeke 2002-11-29 12:01:58 +00:00
parent 0e2cf7606d
commit 18a20212d9
3 changed files with 51 additions and 8 deletions
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28
lib/Target/X86/InstSelectSimple.cpp
View File

@ -363,10 +363,30 @@ ISel::visitBranchInst (BranchInst & BI)
}
}
/// visitCallInst - Have to push args and do a procedure call
/// instruction, if the target address is known.
void ISel::visitCallInst (CallInst &CI) {
visitInstruction (CI);
/// visitCallInst - Push args on stack and do a procedure call instruction.
void
ISel::visitCallInst (CallInst & CI)
{
// Push the arguments on the stack in reverse order, as specified by
// the ABI.
for (unsigned i = CI.getNumOperands (); i >= 1; --i)
{
Value *v = CI.getOperand (i);
unsigned argReg = getReg (v);
switch (getClass (v->getType ()))
{
case cInt:
case cFloat:
BuildMI (BB, X86::PUSHr32, 1).addReg (argReg);
break;
default:
// FIXME
visitInstruction (CI);
break;
}
}
// Emit a CALL instruction with PC-relative displacement.
BuildMI (BB, X86::CALLpcrel32, 1).addPCDisp (CI.getCalledValue ());
}
/// visitSimpleBinary - Implement simple binary operators for integral types...

28
lib/Target/X86/X86ISelSimple.cpp
View File

@ -363,10 +363,30 @@ ISel::visitBranchInst (BranchInst & BI)
}
}
/// visitCallInst - Have to push args and do a procedure call
/// instruction, if the target address is known.
void ISel::visitCallInst (CallInst &CI) {
visitInstruction (CI);
/// visitCallInst - Push args on stack and do a procedure call instruction.
void
ISel::visitCallInst (CallInst & CI)
{
// Push the arguments on the stack in reverse order, as specified by
// the ABI.
for (unsigned i = CI.getNumOperands (); i >= 1; --i)
{
Value *v = CI.getOperand (i);
unsigned argReg = getReg (v);
switch (getClass (v->getType ()))
{
case cInt:
case cFloat:
BuildMI (BB, X86::PUSHr32, 1).addReg (argReg);
break;
default:
// FIXME
visitInstruction (CI);
break;
}
}
// Emit a CALL instruction with PC-relative displacement.
BuildMI (BB, X86::CALLpcrel32, 1).addPCDisp (CI.getCalledValue ());
}
/// visitSimpleBinary - Implement simple binary operators for integral types...

3
lib/Target/X86/X86InstrInfo.def
View File

@ -39,6 +39,7 @@ I(RET , "ret", 0xCB, M_RET_FLAG, X86II::RawFrm | X86II::Void)
I(JMP , "jmp", 0xE9, M_BRANCH_FLAG, X86II::Void) // jmp foo
I(JNE , "jne", 0x85, M_BRANCH_FLAG, X86II::TB | X86II::Void)
I(JE , "je", 0x84, M_BRANCH_FLAG, X86II::TB | X86II::Void)
I(CALLpcrel32 , "call", 0xE8, M_BRANCH_FLAG, X86II::Void)
// Misc instructions
I(LEAVE , "leave", 0xC9, 0, X86II::RawFrm) // leave
@ -58,6 +59,8 @@ I(MOVrm16 , "movw", 0x89, 0, X86II::MRMDestMem | X86II::Void |
X86II::OpSize)
I(MOVrm32 , "movl", 0x89, 0, X86II::MRMDestMem | X86II::Void) // [mem] = R32 89/r
I(PUSHr32 , "pushl", 0x50, 0, X86II::AddRegFrm | X86II::Void)
// Arithmetic instructions
I(ADDrr8 , "addb", 0x00, 0, X86II::MRMDestReg) // R8 += R8
I(ADDrr16 , "addw", 0x01, 0, X86II::MRMDestReg | X86II::OpSize) // R16 += R16