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Moving LoadAcquire/StoreRelease behavior up into HIR.

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This commit is contained in:
Ben Vanik
2014-01-04 00:50:48 -08:00
parent 88b631b160
commit 93ea56179a
11 changed files with 97 additions and 197 deletions
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23
src/alloy/frontend/ppc/ppc_hir_builder.cc
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@@ -141,6 +141,8 @@ int PPCHIRBuilder::Emit(FunctionInfo* symbol_info) {
// splits blocks we don't have weird pointers.
if (prev_instr && prev_instr->next) {
instr_offset_list_[offset] = prev_instr->next;
} else if (prev_instr) {
instr_offset_list_[offset] = prev_instr->block->next->instr_head;
} else if (current_block_) {
instr_offset_list_[offset] = current_block_->instr_head;
} else if (block_tail_) {
@@ -326,3 +328,24 @@ void PPCHIRBuilder::StoreVR(uint32_t reg, Value* value) {
StoreContext(
offsetof(PPCContext, v) + reg * 16, value);
}
Value* PPCHIRBuilder::LoadAcquire(
Value* address, TypeName type, uint32_t load_flags) {
AtomicExchange(
LoadContext(offsetof(PPCContext, reserve_address), INT64_TYPE),
Truncate(address, INT32_TYPE));
return Load(address, type, load_flags);
}
Value* PPCHIRBuilder::StoreRelease(
Value* address, Value* value, uint32_t store_flags) {
Value* old_address = AtomicExchange(
LoadContext(offsetof(PPCContext, reserve_address), INT64_TYPE),
LoadZero(INT32_TYPE));
Value* eq = CompareEQ(Truncate(address, INT32_TYPE), old_address);
auto skip_label = NewLabel();
BranchFalse(eq, skip_label, BRANCH_UNLIKELY);
Store(address, value, store_flags);
MarkLabel(skip_label);
return eq;
}