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Commita7aa608

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Inline hot path of slot_getsomeattrs().
This yields a minor speedup, which roughly balances the loss from theupcoming introduction of callbacks to do some operations on slots.Author: Andres FreundDiscussion:https://postgr.es/m/20181105210039.hh4vvi4vwoq5ba2q@alap3.anarazel.de
1 parent3f2393e commita7aa608

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7 files changed

+31
-25
lines changed

7 files changed

+31
-25
lines changed

‎src/backend/executor/execExprInterp.c

Lines changed: 0 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -428,7 +428,6 @@ ExecInterpExpr(ExprState *state, ExprContext *econtext, bool *isnull)
428428
{
429429
CheckOpSlotCompatibility(op,innerslot);
430430

431-
/* XXX: worthwhile to check tts_nvalid inline first? */
432431
slot_getsomeattrs(innerslot,op->d.fetch.last_var);
433432

434433
EEO_NEXT();

‎src/backend/executor/execTuples.c

Lines changed: 14 additions & 18 deletions
Original file line numberDiff line numberDiff line change
@@ -1183,22 +1183,19 @@ slot_getattr(TupleTableSlot *slot, int attnum, bool *isnull)
11831183
}
11841184

11851185
/*
1186-
* slot_getsomeattrs
1187-
*This function forces the entries of the slot's Datum/isnull
1188-
*arrays to be valid at least up through the attnum'th entry.
1186+
* slot_getsomeattrs_int - workhorse for slot_getsomeattrs()
11891187
*/
11901188
void
1191-
slot_getsomeattrs(TupleTableSlot*slot,intattnum)
1189+
slot_getsomeattrs_int(TupleTableSlot*slot,intattnum)
11921190
{
11931191
HeapTupletuple;
11941192
intattno;
11951193

1196-
/*Quick out if we have 'em all already */
1197-
if(slot->tts_nvalid>=attnum)
1198-
return;
1194+
/*Check for caller errors */
1195+
Assert(slot->tts_nvalid<attnum);/* slot_getsomeattr checked */
1196+
Assert(attnum>0);
11991197

1200-
/* Check for caller error */
1201-
if (attnum <=0||attnum>slot->tts_tupleDescriptor->natts)
1198+
if (unlikely(attnum>slot->tts_tupleDescriptor->natts))
12021199
elog(ERROR,"invalid attribute number %d",attnum);
12031200

12041201
/*
@@ -1209,9 +1206,7 @@ slot_getsomeattrs(TupleTableSlot *slot, int attnum)
12091206
if (tuple==NULL)/* internal error */
12101207
elog(ERROR,"cannot extract attribute from empty tuple slot");
12111208

1212-
/*
1213-
* load up any slots available from physical tuple
1214-
*/
1209+
/* Fetch as many attributes as possible from the underlying tuple. */
12151210
attno=HeapTupleHeaderGetNatts(tuple->t_data);
12161211
attno=Min(attno,attnum);
12171212

@@ -1220,13 +1215,14 @@ slot_getsomeattrs(TupleTableSlot *slot, int attnum)
12201215
attno=slot->tts_nvalid;
12211216

12221217
/*
1223-
* If tuple doesn't haveall the atts indicated by attnum, read the rest
1224-
*as NULLs or missingvalues
1218+
* Ifthe underlyingtuple doesn't haveenough attributes, tuple descriptor
1219+
*must have the missingattributes.
12251220
*/
1226-
if (attno<attnum)
1227-
slot_getmissingattrs(slot,attno,attnum);
1228-
1229-
slot->tts_nvalid=attnum;
1221+
if (unlikely(slot->tts_nvalid<attnum))
1222+
{
1223+
slot_getmissingattrs(slot,slot->tts_nvalid,attnum);
1224+
slot->tts_nvalid=attnum;
1225+
}
12301226
}
12311227

12321228
/* ----------------------------------------------------------------

‎src/backend/jit/llvm/llvmjit.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -79,7 +79,7 @@ LLVMTypeRef StructAggStatePerTransData;
7979
LLVMValueRefAttributeTemplate;
8080
LLVMValueRefFuncStrlen;
8181
LLVMValueRefFuncVarsizeAny;
82-
LLVMValueRefFuncSlotGetsomeattrs;
82+
LLVMValueRefFuncSlotGetsomeattrsInt;
8383
LLVMValueRefFuncSlotGetmissingattrs;
8484
LLVMValueRefFuncMakeExpandedObjectReadOnlyInternal;
8585
LLVMValueRefFuncExecEvalArrayRefSubscript;
@@ -820,7 +820,7 @@ llvm_create_types(void)
820820
AttributeTemplate=LLVMGetNamedFunction(mod,"AttributeTemplate");
821821
FuncStrlen=LLVMGetNamedFunction(mod,"strlen");
822822
FuncVarsizeAny=LLVMGetNamedFunction(mod,"varsize_any");
823-
FuncSlotGetsomeattrs=LLVMGetNamedFunction(mod,"slot_getsomeattrs");
823+
FuncSlotGetsomeattrsInt=LLVMGetNamedFunction(mod,"slot_getsomeattrs_int");
824824
FuncSlotGetmissingattrs=LLVMGetNamedFunction(mod,"slot_getmissingattrs");
825825
FuncMakeExpandedObjectReadOnlyInternal=LLVMGetNamedFunction(mod,"MakeExpandedObjectReadOnlyInternal");
826826
FuncExecEvalArrayRefSubscript=LLVMGetNamedFunction(mod,"ExecEvalArrayRefSubscript");

‎src/backend/jit/llvm/llvmjit_expr.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -345,7 +345,7 @@ llvm_compile_expr(ExprState *state)
345345
params[1]=l_int32_const(op->d.fetch.last_var);
346346

347347
LLVMBuildCall(b,
348-
llvm_get_decl(mod,FuncSlotGetsomeattrs),
348+
llvm_get_decl(mod,FuncSlotGetsomeattrsInt),
349349
params,lengthof(params),"");
350350
}
351351

‎src/backend/jit/llvm/llvmjit_types.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -97,7 +97,7 @@ void *referenced_functions[] =
9797
{
9898
strlen,
9999
varsize_any,
100-
slot_getsomeattrs,
100+
slot_getsomeattrs_int,
101101
slot_getmissingattrs,
102102
MakeExpandedObjectReadOnlyInternal,
103103
ExecEvalArrayRefSubscript,

‎src/include/executor/tuptable.h

Lines changed: 12 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -219,17 +219,28 @@ extern void slot_getmissingattrs(TupleTableSlot *slot, int startAttNum,
219219
intlastAttNum);
220220
externDatumslot_getattr(TupleTableSlot*slot,intattnum,
221221
bool*isnull);
222-
externvoidslot_getsomeattrs(TupleTableSlot*slot,intattnum);
223222

224223
/* in access/common/heaptuple.c */
225224
externboolslot_attisnull(TupleTableSlot*slot,intattnum);
226225
externboolslot_getsysattr(TupleTableSlot*slot,intattnum,
227226
Datum*value,bool*isnull);
228227
externDatumgetmissingattr(TupleDesctupleDesc,
229228
intattnum,bool*isnull);
229+
externvoidslot_getsomeattrs_int(TupleTableSlot*slot,intattnum);
230230

231231
#ifndefFRONTEND
232232

233+
/*
234+
* This function forces the entries of the slot's Datum/isnull arrays to be
235+
* valid at least up through the attnum'th entry.
236+
*/
237+
staticinlinevoid
238+
slot_getsomeattrs(TupleTableSlot*slot,intattnum)
239+
{
240+
if (slot->tts_nvalid<attnum)
241+
slot_getsomeattrs_int(slot,attnum);
242+
}
243+
233244
/*
234245
* slot_getallattrs
235246
*This function forces all the entries of the slot's Datum/isnull

‎src/include/jit/llvmjit.h

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -77,8 +77,8 @@ extern LLVMTypeRef StructAggStatePerGroupData;
7777
externLLVMValueRefAttributeTemplate;
7878
externLLVMValueRefFuncStrlen;
7979
externLLVMValueRefFuncVarsizeAny;
80-
externLLVMValueRefFuncSlotGetsomeattrs;
8180
externLLVMValueRefFuncSlotGetmissingattrs;
81+
externLLVMValueRefFuncSlotGetsomeattrsInt;
8282
externLLVMValueRefFuncMakeExpandedObjectReadOnlyInternal;
8383
externLLVMValueRefFuncExecEvalArrayRefSubscript;
8484
externLLVMValueRefFuncExecEvalSysVar;

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