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Minor improvement to multi return value reducing stack usage

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This commit is contained in:
gingerBill
2022-11-13 22:55:32 +00:00
parent 7dfbda58d9
commit a705a2e38b
6 changed files with 90 additions and 19 deletions
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src/llvm_backend_general.cpp
+14 -10
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@@ -936,23 +936,27 @@ void lb_emit_store(lbProcedure *p, lbValue ptr, lbValue value) {
LLVMValueRef src_ptr_original = LLVMGetOperand(value.value, 0);
LLVMValueRef src_ptr = LLVMBuildPointerCast(p->builder, src_ptr_original, LLVMTypeOf(dst_ptr), "");
LLVMBuildMemMove(p->builder,
dst_ptr, lb_try_get_alignment(dst_ptr, 1),
src_ptr, lb_try_get_alignment(src_ptr_original, 1),
LLVMConstInt(LLVMInt64TypeInContext(p->module->ctx), lb_sizeof(LLVMTypeOf(value.value)), false));
if (dst_ptr != src_ptr && dst_ptr != src_ptr_original) {
LLVMBuildMemMove(p->builder,
dst_ptr, lb_try_get_alignment(dst_ptr, 1),
src_ptr, lb_try_get_alignment(src_ptr_original, 1),
LLVMConstInt(LLVMInt64TypeInContext(p->module->ctx), lb_sizeof(LLVMTypeOf(value.value)), false));
}
return;
} else if (LLVMIsConstant(value.value)) {
lbAddr addr = lb_add_global_generated(p->module, value.type, value, nullptr);
lb_make_global_private_const(addr);
LLVMValueRef dst_ptr = ptr.value;
LLVMValueRef src_ptr = addr.addr.value;
src_ptr = LLVMBuildPointerCast(p->builder, src_ptr, LLVMTypeOf(dst_ptr), "");
LLVMValueRef src_ptr_original = addr.addr.value;
LLVMValueRef src_ptr = LLVMBuildPointerCast(p->builder, src_ptr_original, LLVMTypeOf(dst_ptr), "");
LLVMBuildMemMove(p->builder,
dst_ptr, lb_try_get_alignment(dst_ptr, 1),
src_ptr, lb_try_get_alignment(src_ptr, 1),
LLVMConstInt(LLVMInt64TypeInContext(p->module->ctx), lb_sizeof(LLVMTypeOf(value.value)), false));
if (dst_ptr != src_ptr && dst_ptr != src_ptr_original) {
LLVMBuildMemMove(p->builder,
dst_ptr, lb_try_get_alignment(dst_ptr, 1),
src_ptr, lb_try_get_alignment(src_ptr, 1),
LLVMConstInt(LLVMInt64TypeInContext(p->module->ctx), lb_sizeof(LLVMTypeOf(value.value)), false));
}
return;
}
}