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Implement initial support for return values from call instructions

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4924 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2002-12-04 23:45:28 +00:00
parent 06f8aecc88
commit a324364f04
2 changed files with 28 additions and 0 deletions
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14
lib/Target/X86/InstSelectSimple.cpp
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@ -430,6 +430,20 @@ ISel::visitCallInst (CallInst & CI)
// Adjust the stack by `bytesPushed' amount if non-zero // Adjust the stack by `bytesPushed' amount if non-zero
if (bytesPushed > 0) if (bytesPushed > 0)
BuildMI (BB, X86::ADDri32, 2).addReg(X86::ESP).addZImm(bytesPushed); BuildMI (BB, X86::ADDri32, 2).addReg(X86::ESP).addZImm(bytesPushed);
// If there is a return value, scavenge the result from the location the call
// leaves it in...
//
switch (getClass(CI.getType())) {
case cInt:
BuildMI(BB, X86::MOVrr32, 1, getReg(CI)).addReg(X86::EAX);
break;
default:
std::cerr << "Cannot get return value for call of type '"
<< *CI.getType() << "'\n";
visitInstruction(CI);
}
} }
/// visitSimpleBinary - Implement simple binary operators for integral types... /// visitSimpleBinary - Implement simple binary operators for integral types...

14
lib/Target/X86/X86ISelSimple.cpp
View File

@ -430,6 +430,20 @@ ISel::visitCallInst (CallInst & CI)
// Adjust the stack by `bytesPushed' amount if non-zero // Adjust the stack by `bytesPushed' amount if non-zero
if (bytesPushed > 0) if (bytesPushed > 0)
BuildMI (BB, X86::ADDri32, 2).addReg(X86::ESP).addZImm(bytesPushed); BuildMI (BB, X86::ADDri32, 2).addReg(X86::ESP).addZImm(bytesPushed);
// If there is a return value, scavenge the result from the location the call
// leaves it in...
//
switch (getClass(CI.getType())) {
case cInt:
BuildMI(BB, X86::MOVrr32, 1, getReg(CI)).addReg(X86::EAX);
break;
default:
std::cerr << "Cannot get return value for call of type '"
<< *CI.getType() << "'\n";
visitInstruction(CI);
}
} }
/// visitSimpleBinary - Implement simple binary operators for integral types... /// visitSimpleBinary - Implement simple binary operators for integral types...