nexoniarz/Finch
Watch
1
0
Fork
You've already forked Finch
 0
mirror of https://github.com/Nexoniarz/Finch.git synced 2026-11-03 08:54:25 +00:00
Code Issues Projects Releases Packages Wiki Activity

Windows support (wip): target layer, Microsoft x64 ABI, portable runtime, CI

Browse source 
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Nexoniarz 2026-10-08 20:46:51 +02:00
commit 84cbbb3e16
18 changed files with 481 additions and 94 deletions
Download patch file Download diff file Expand all files Collapse all files

26
src/abi.cpp
View file

@ -3,6 +3,7 @@
// either INTEGER (general registers) or SSE (xmm registers); bigger ones go through memory.
#include "codegen_impl.h"
#include "target.h"
using namespace llvm;
@ -44,6 +45,18 @@ AbiArg Codegen::classify(const FType &t) {
AbiArg a;
if (t.kind != FType::Struct) return a; // Direct
uint64_t size = dl->getTypeAllocSize(ty(t));
if (g_target.windows) {
// Microsoft x64: 1, 2, 4 or 8 bytes travel as one integer (even if they hold floats);
// anything else is copied by the caller and passed by address
if (size == 1 || size == 2 || size == 4 || size == 8) {
a.kind = AbiArg::Expand;
a.parts.push_back(b.getIntNTy(size * 8));
a.coerced = a.parts[0];
} else {
a.kind = AbiArg::Indirect;
}
return a;
}
if (size > 16 || size == 0) {
a.kind = AbiArg::Memory;
return a;
@ -96,6 +109,7 @@ static Plan makePlan(Codegen &cg, const FType &ret, const std::vector<FType> &pa
llvm::Type *retTy = cg.ty(ret);
if (ret.kind == FType::Str) retTy = cg.b.getPtrTy();
pl.ret = cg.classify(ret);
if (pl.ret.kind == AbiArg::Indirect) pl.ret.kind = AbiArg::Memory; // returned through a hidden pointer
if (pl.ret.kind == AbiArg::Memory) {
types.push_back(cg.b.getPtrTy()); // sret
retTy = cg.b.getVoidTy();
@ -108,7 +122,7 @@ static Plan makePlan(Codegen &cg, const FType &ret, const std::vector<FType> &pa
if (a.kind == AbiArg::Expand) {
int ni = 0, ns = 0;
for (llvm::Type *p : a.parts) (p->isIntegerTy() ? ni : ns)++;
if (ni <= intRegs && ns <= sseRegs) {
if (g_target.windows || (ni <= intRegs && ns <= sseRegs)) {
intRegs -= ni;
sseRegs -= ns;
for (llvm::Type *p : a.parts) types.push_back(p);
@ -116,7 +130,7 @@ static Plan makePlan(Codegen &cg, const FType &ret, const std::vector<FType> &pa
a.kind = AbiArg::Memory; // out of registers: the whole struct goes on the stack
}
}
if (a.kind == AbiArg::Memory) types.push_back(cg.b.getPtrTy());
if (a.kind == AbiArg::Memory || a.kind == AbiArg::Indirect) types.push_back(cg.b.getPtrTy());
if (a.kind == AbiArg::Direct) {
if (t.isFloat()) sseRegs--;
else intRegs--;
@ -152,6 +166,8 @@ static AttributeList attrsFor(Codegen &cg, const Plan &pl, const FType &ret, con
al = al.addParamAttribute(ctx, idx, Attribute::getWithByValType(ctx, cg.ty(params[i])));
al = al.addParamAttribute(ctx, idx, Attribute::getWithAlignment(ctx, Align(align)));
idx++;
} else if (a.kind == AbiArg::Indirect) {
idx++;
} else if (a.kind == AbiArg::Expand) {
idx += a.parts.size();
} else {
@ -221,8 +237,8 @@ Value_ Codegen::emitCCall(const CFunc &f, Function *fn, std::vector<Value_> args
const AbiArg &a = pl.params[i];
if (ps[i].kind == FType::Str) {
ll.push_back(cstr(v.v));
} else if (a.kind == AbiArg::Memory) {
Value *s = tmpOf(ty(ps[i]));
} else if (a.kind == AbiArg::Memory || a.kind == AbiArg::Indirect) {
Value *s = tmpOf(ty(ps[i])); // a copy the callee may change
cast<AllocaInst>(s)->setAlignment(Align(16));
b.CreateStore(v.v, s);
ll.push_back(s);
@ -278,7 +294,7 @@ Function *Codegen::cThunk(Fn &fn, Pos p) {
std::vector<Value *> args;
for (size_t i = 0; i < fn.params.size(); i++) {
const AbiArg &a = pl.params[i];
if (a.kind == AbiArg::Memory) {
if (a.kind == AbiArg::Memory || a.kind == AbiArg::Indirect) {
args.push_back(b.CreateLoad(ty(fn.params[i]), th->getArg(ai++)));
} else if (a.kind == AbiArg::Expand) {
Value *s = abiSlot(*this, fn.params[i], a);