Displaying 3 results from an estimated 3 matches for "mirbuild".
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2017 Dec 21
2
How to implement lowerReturn for poring GlobalISel to RISCV?
Hi LLVM developers,
Thank Daniel Sanders, Aditya Nandakumar and Justin Bogner's Tutorial[1]:
Head First into GlobalISel about how to port, and Aditya took BPF target
as a simple instance:
bool BPFCallLowering::lowerReturn(MachineIRBuilder &MIRBuilder,
const Value *Val, unsigned VReg) const {
assert(!Val == !VReg && "Return value without a vreg");
MIRBuilder.buildInstr(BPF::RET);
return true;
}
But how to implement it for RISCV target?
https://github.com/xiangzhai/llvm/commit/c49...
2019 Jul 24
2
About a new porting of GlobalIsel for RISCV
...trying to implement the "LowerReturn"
function, and it can return correctly. The code snippet may be as
follows:
...
CCState CCInfo(F.getCallingConv(), F.isVarArg(), MF, ArgLocs, F.getContext());
TLI.analyzeOutputArgs(MF, CCInfo, Outs, true, nullptr);
RISCVValueHandler RetHandler(MIRBuilder, MF.getRegInfo(), Ret);
RetHandler.handleArg(ArgLocs, RetInfos);
...
In order to reduce duplicated code as much as possible, and reuse part
of code from "TargetLowering" for GlobalIsel, the access specifiers
for some functions in RISCVTargetLowering need be changed, like
"analy...
2019 Jan 31
2
MachineIRBuilder API
I’m less interested in literally passing the output of one as an argument to the next such that argument evaluation order matters. Intermediate register variables are fine. It would still be less code to have tmp = buildFoo(), buildFoo(tmp) than the current code required to manage the register
-Matt
From: <daniel_l_sanders at apple.com> on behalf of Daniel Sanders <daniel_l_sanders at