On Fri, Nov 16, 2018 at 08:38:26AM -0600, Justin Pryzby wrote: > BTW find attached patch which I believe corrects some comments.
Updated. Some of the changes may be gratuitous, but changed while I was already looking. Also note that I had to remove -flto=thin to compile under RH7. Justin
diff --git a/src/backend/jit/llvm/llvmjit_deform.c b/src/backend/jit/llvm/llvmjit_deform.c index 938dfc7..0663719 100644 --- a/src/backend/jit/llvm/llvmjit_deform.c +++ b/src/backend/jit/llvm/llvmjit_deform.c @@ -98,7 +98,7 @@ slot_compile_deform(LLVMJitContext *context, TupleDesc desc, funcname = llvm_expand_funcname(context, "deform"); /* - * Check which columns do have to exist, so we don't have to check the + * Check which columns have to exist, so we don't have to check the * rows natts unnecessarily. */ for (attnum = 0; attnum < desc->natts; attnum++) @@ -257,7 +257,7 @@ slot_compile_deform(LLVMJitContext *context, TupleDesc desc, } /* - * Check if's guaranteed the all the desired attributes are available in + * Check if it's guaranteed that all the desired attributes are available in * tuple. If so, we can start deforming. If not, need to make sure to * fetch the missing columns. */ @@ -342,7 +342,7 @@ slot_compile_deform(LLVMJitContext *context, TupleDesc desc, /* * If this is the first attribute, slot->tts_nvalid was 0. Therefore - * reset offset to 0 to, it be from a previous execution. + * also reset offset to 0, it may be from a previous execution. */ if (attnum == 0) { @@ -372,7 +372,7 @@ slot_compile_deform(LLVMJitContext *context, TupleDesc desc, /* * Check for nulls if necessary. No need to take missing attributes - * into account, because in case they're present the heaptuple's natts + * into account, because if they're present, the heaptuple's natts * would have indicated that a slot_getmissingattrs() is needed. */ if (!att->attnotnull) @@ -459,13 +459,13 @@ slot_compile_deform(LLVMJitContext *context, TupleDesc desc, (known_alignment < 0 || known_alignment != TYPEALIGN(alignto, known_alignment))) { /* - * When accessing a varlena field we have to "peek" to see if we + * When accessing a varlena field, we have to "peek" to see if we * are looking at a pad byte or the first byte of a 1-byte-header * datum. A zero byte must be either a pad byte, or the first - * byte of a correctly aligned 4-byte length word; in either case + * byte of a correctly aligned 4-byte length word; in either case, * we can align safely. A non-zero byte must be either a 1-byte * length word, or the first byte of a correctly aligned 4-byte - * length word; in either case we need not align. + * length word; in either case, we need not align. */ if (att->attlen == -1) { @@ -559,8 +559,8 @@ slot_compile_deform(LLVMJitContext *context, TupleDesc desc, else if (att->attnotnull && attguaranteedalign && known_alignment >= 0) { /* - * If the offset to the column was previously known a NOT NULL & - * fixed width column guarantees that alignment is just the + * If the offset to the column was previously known, a NOT NULL & + * fixed-width column guarantees that alignment is just the * previous alignment plus column width. */ Assert(att->attlen > 0); @@ -601,8 +601,8 @@ slot_compile_deform(LLVMJitContext *context, TupleDesc desc, LLVMBuildGEP(b, v_tts_nulls, &l_attno, 1, "")); /* - * Store datum. For byval datums copy the value, extend to Datum's - * width, and store. For byref types, store pointer to data. + * Store datum. For byval datums: copy the value, extend to Datum's + * width, and store. For byref types: store pointer to data. */ if (att->attbyval) {