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jit: Reference function pointer types via llvmjit_types.c.

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It is error prone (see 5da871bfa1) and verbose to manually create function
types. Add a helper that can reference a function pointer type via
llvmjit_types.c and and convert existing instances of manual creation.

Author: Andres Freund <andres@anarazel.de>
Reviewed-By: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/20201207212142.wz5tnbk2jsaqzogb@alap3.anarazel.de
This commit is contained in:
Andres Freund
2020-12-07 13:16:55 -08:00
parent 62ee703313
commit df99ddc70b
4 changed files with 69 additions and 63 deletions
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95
src/backend/jit/llvm/llvmjit.c
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@ -367,6 +367,47 @@ llvm_get_function(LLVMJitContext *context, const char *funcname)
return NULL;
}
/*
* Return type of a variable in llvmjit_types.c. This is useful to keep types
* in sync between plain C and JIT related code.
*/
LLVMTypeRef
llvm_pg_var_type(const char *varname)
{
LLVMValueRef v_srcvar;
LLVMTypeRef typ;
/* this'll return a *pointer* to the global */
v_srcvar = LLVMGetNamedGlobal(llvm_types_module, varname);
if (!v_srcvar)
elog(ERROR, "variable %s not in llvmjit_types.c", varname);
/* look at the contained type */
typ = LLVMTypeOf(v_srcvar);
Assert(typ != NULL && LLVMGetTypeKind(typ) == LLVMPointerTypeKind);
typ = LLVMGetElementType(typ);
Assert(typ != NULL);
return typ;
}
/*
* Return function type of a variable in llvmjit_types.c. This is useful to
* keep function types in sync between C and JITed code.
*/
LLVMTypeRef
llvm_pg_var_func_type(const char *varname)
{
LLVMTypeRef typ = llvm_pg_var_type(varname);
/* look at the contained type */
Assert(LLVMGetTypeKind(typ) == LLVMPointerTypeKind);
typ = LLVMGetElementType(typ);
Assert(typ != NULL && LLVMGetTypeKind(typ) == LLVMFunctionTypeKind);
return typ;
}
/*
* Return declaration for a function referenced in llvmjit_types.c, adding it
* to the module if necessary.
@ -889,26 +930,6 @@ llvm_shutdown(int code, Datum arg)
#endif /* LLVM_VERSION_MAJOR > 11 */
}
/* helper for llvm_create_types, returning a global var's type */
static LLVMTypeRef
load_type(LLVMModuleRef mod, const char *name)
{
LLVMValueRef value;
LLVMTypeRef typ;
/* this'll return a *pointer* to the global */
value = LLVMGetNamedGlobal(mod, name);
if (!value)
elog(ERROR, "type %s is unknown", name);
/* therefore look at the contained type and return that */
typ = LLVMTypeOf(value);
Assert(typ != NULL);
typ = LLVMGetElementType(typ);
Assert(typ != NULL);
return typ;
}
/* helper for llvm_create_types, returning a function's return type */
static LLVMTypeRef
load_return_type(LLVMModuleRef mod, const char *name)
@ -970,24 +991,24 @@ llvm_create_types(void)
llvm_triple = pstrdup(LLVMGetTarget(llvm_types_module));
llvm_layout = pstrdup(LLVMGetDataLayoutStr(llvm_types_module));
TypeSizeT = load_type(llvm_types_module, "TypeSizeT");
TypeSizeT = llvm_pg_var_type("TypeSizeT");
TypeParamBool = load_return_type(llvm_types_module, "FunctionReturningBool");
TypeStorageBool = load_type(llvm_types_module, "TypeStorageBool");
TypePGFunction = load_type(llvm_types_module, "TypePGFunction");
StructNullableDatum = load_type(llvm_types_module, "StructNullableDatum");
StructExprContext = load_type(llvm_types_module, "StructExprContext");
StructExprEvalStep = load_type(llvm_types_module, "StructExprEvalStep");
StructExprState = load_type(llvm_types_module, "StructExprState");
StructFunctionCallInfoData = load_type(llvm_types_module, "StructFunctionCallInfoData");
StructMemoryContextData = load_type(llvm_types_module, "StructMemoryContextData");
StructTupleTableSlot = load_type(llvm_types_module, "StructTupleTableSlot");
StructHeapTupleTableSlot = load_type(llvm_types_module, "StructHeapTupleTableSlot");
StructMinimalTupleTableSlot = load_type(llvm_types_module, "StructMinimalTupleTableSlot");
StructHeapTupleData = load_type(llvm_types_module, "StructHeapTupleData");
StructTupleDescData = load_type(llvm_types_module, "StructTupleDescData");
StructAggState = load_type(llvm_types_module, "StructAggState");
StructAggStatePerGroupData = load_type(llvm_types_module, "StructAggStatePerGroupData");
StructAggStatePerTransData = load_type(llvm_types_module, "StructAggStatePerTransData");
TypeStorageBool = llvm_pg_var_type("TypeStorageBool");
TypePGFunction = llvm_pg_var_type("TypePGFunction");
StructNullableDatum = llvm_pg_var_type("StructNullableDatum");
StructExprContext = llvm_pg_var_type("StructExprContext");
StructExprEvalStep = llvm_pg_var_type("StructExprEvalStep");
StructExprState = llvm_pg_var_type("StructExprState");
StructFunctionCallInfoData = llvm_pg_var_type("StructFunctionCallInfoData");
StructMemoryContextData = llvm_pg_var_type("StructMemoryContextData");
StructTupleTableSlot = llvm_pg_var_type("StructTupleTableSlot");
StructHeapTupleTableSlot = llvm_pg_var_type("StructHeapTupleTableSlot");
StructMinimalTupleTableSlot = llvm_pg_var_type("StructMinimalTupleTableSlot");
StructHeapTupleData = llvm_pg_var_type("StructHeapTupleData");
StructTupleDescData = llvm_pg_var_type("StructTupleDescData");
StructAggState = llvm_pg_var_type("StructAggState");
StructAggStatePerGroupData = llvm_pg_var_type("StructAggStatePerGroupData");
StructAggStatePerTransData = llvm_pg_var_type("StructAggStatePerTransData");
AttributeTemplate = LLVMGetNamedFunction(llvm_types_module, "AttributeTemplate");
}