D/ldc
1
0
Fork 0
mirror of https://github.com/xomboverlord/ldc.git synced 2026-01-27 01:53:13 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Improve ABI conformance on x86 by passing the sret parameter in EAX if there's

Browse Source 
no `this`.
This commit is contained in:
Frits van Bommel
2009-05-31 12:43:59 +02:00
parent 1e9ad13b12
commit 2fe8f2cd74
2 changed files with 11 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
gen/abi.cpp
View File

@@ -196,8 +196,16 @@ struct X86TargetABI : TargetABI
Logger::println("Putting context ptr in register");
fty.arg_nest->attrs = llvm::Attribute::InReg;
}
else if (IrFuncTyArg* sret = fty.arg_sret)
{
Logger::println("Putting sret ptr in register");
// sret and inreg are incompatible, but the ABI requires the
// sret parameter to be in EAX in this situation...
sret->attrs = (sret->attrs | llvm::Attribute::InReg)
& ~llvm::Attribute::StructRet;
}
// otherwise try to mark the last param inreg
else if (!fty.arg_sret && !fty.args.empty())
else if (!fty.args.empty())
{
// The last parameter is passed in EAX rather than being pushed on the stack if the following conditions are met:
// * It fits in EAX.