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Heavily improve the copy elision logic in the backend

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This commit is contained in:
gingerBill
2021-05-24 20:57:44 +01:00
parent c440296ae8
commit d35a9e65b6
2 changed files with 104 additions and 47 deletions
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src/llvm_backend.hpp
+8 -3
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@@ -215,6 +215,12 @@ enum lbProcedureFlag : u32 {
lbProcedureFlag_WithoutMemcpyPass = 1<<0,
};
struct lbCopyElisionHint {
lbValue ptr;
Ast * ast;
bool used;
};
struct lbProcedure {
u32 flags;
u16 state_flags;
@@ -260,9 +266,7 @@ struct lbProcedure {
LLVMMetadataRef debug_info;
lbValue return_ptr_hint_value;
Ast * return_ptr_hint_ast;
bool return_ptr_hint_used;
lbCopyElisionHint copy_elision_hint;
};
@@ -413,6 +417,7 @@ lbValue lb_emit_reverse_bits(lbProcedure *p, lbValue x, Type *type);
lbValue lb_emit_bit_set_card(lbProcedure *p, lbValue x);
void lb_mem_zero_addr(lbProcedure *p, LLVMValueRef ptr, Type *type);
#define LB_STARTUP_RUNTIME_PROC_NAME "__$startup_runtime"