fabi/Xenia-Canary
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Oh my. Basic CFA/DFA, local variable support, misc fixes, etc.

Browse Source
This commit is contained in:
Ben Vanik
2014-02-02 00:33:57 -08:00
parent b29276e167
commit bca349b302
37 changed files with 3048 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
src/alloy/backend/x64/x64_emitter.cc
View File

@@ -97,6 +97,8 @@ void* X64Emitter::Emplace(size_t stack_size) {
return new_address;
}
#define XEALIGN(value, align) ((value + align - 1) & ~(align - 1))
int X64Emitter::Emit(HIRBuilder* builder) {
// These are the registers we will not be using. All others are fare game.
const uint32_t reserved_regs =
@@ -120,6 +122,19 @@ int X64Emitter::Emit(HIRBuilder* builder) {
GetRegBit(xmm4) |
GetRegBit(xmm5);
// Calculate stack size. We need to align things to their natural sizes.
// This could be much better (sort by type/etc).
auto locals = builder->locals();
size_t stack_offset = 0;
for (auto it = locals.begin(); it != locals.end(); ++it) {
auto slot = *it;
size_t type_size = GetTypeSize(slot->type);
// Align to natural size.
stack_offset = XEALIGN(stack_offset, type_size);
slot->set_constant(stack_offset);
stack_offset += type_size;
}
// Function prolog.
// Must be 16b aligned.
// Windows is very strict about the form of this and the epilog: