[PATCH 14/29] rs6000: Build and store function type identifiers
Bill Schmidt
wschmidt@Bills-MacBook-Pro.local
Mon Jul 27 14:14:00 GMT 2020
From: Bill Schmidt <wschmidt@linux.ibm.com>
2020-07-26 Bill Schmidt <wschmidt@linux.ibm.com>
* config/rs6000/rs6000-gen-builtins.c (complete_vector_type): New
function.
(complete_base_type): Likewise.
(construct_fntype_id): Likewise.
(parse_bif_entry): Call construct_fntype_id.
(parse_ovld_entry): Likewise.
---
gcc/config/rs6000/rs6000-gen-builtins.c | 211 ++++++++++++++++++++++++
1 file changed, 211 insertions(+)
diff --git a/gcc/config/rs6000/rs6000-gen-builtins.c b/gcc/config/rs6000/rs6000-gen-builtins.c
index 5413cc2681e..b31b666e071 100644
--- a/gcc/config/rs6000/rs6000-gen-builtins.c
+++ b/gcc/config/rs6000/rs6000-gen-builtins.c
@@ -1254,6 +1254,209 @@ htmspr = %d, htmcr = %d, mma = %d, no32bit = %d, cpu = %d, ldstmask = %d.\n",
return PC_OK;
}
+/* Convert a vector type into a mode string. */
+static void
+complete_vector_type (typeinfo *typeptr, char *buf, int *bufi)
+{
+ if (typeptr->isbool)
+ buf[(*bufi)++] = 'b';
+ buf[(*bufi)++] = 'v';
+ if (typeptr->ispixel)
+ {
+ memcpy (&buf[*bufi], "p8hi", 4);
+ *bufi += 4;
+ }
+ else
+ {
+ switch (typeptr->base)
+ {
+ case BT_CHAR:
+ memcpy (&buf[*bufi], "16qi", 4);
+ *bufi += 4;
+ break;
+ case BT_SHORT:
+ memcpy (&buf[*bufi], "8hi", 3);
+ *bufi += 3;
+ break;
+ case BT_INT:
+ memcpy (&buf[*bufi], "4si", 3);
+ *bufi += 3;
+ break;
+ case BT_LONGLONG:
+ memcpy (&buf[*bufi], "2di", 3);
+ *bufi += 3;
+ break;
+ case BT_FLOAT:
+ memcpy (&buf[*bufi], "4sf", 3);
+ *bufi += 3;
+ break;
+ case BT_DOUBLE:
+ memcpy (&buf[*bufi], "2df", 3);
+ *bufi += 3;
+ break;
+ case BT_INT128:
+ memcpy (&buf[*bufi], "1ti", 3);
+ *bufi += 3;
+ break;
+ case BT_FLOAT128:
+ memcpy (&buf[*bufi], "1tf", 3);
+ *bufi += 3;
+ break;
+ default:
+ (*diag) ("unhandled basetype %d.\n", typeptr->base);
+ exit (EC_INTERR);
+ }
+ }
+}
+
+/* Convert a base type into a mode string. */
+static void
+complete_base_type (typeinfo *typeptr, char *buf, int *bufi)
+{
+ switch (typeptr->base)
+ {
+ case BT_CHAR:
+ memcpy (&buf[*bufi], "qi", 2);
+ break;
+ case BT_SHORT:
+ memcpy (&buf[*bufi], "hi", 2);
+ break;
+ case BT_INT:
+ memcpy (&buf[*bufi], "si", 2);
+ break;
+ case BT_LONGLONG:
+ memcpy (&buf[*bufi], "di", 2);
+ break;
+ case BT_FLOAT:
+ memcpy (&buf[*bufi], "sf", 2);
+ break;
+ case BT_DOUBLE:
+ memcpy (&buf[*bufi], "df", 2);
+ break;
+ case BT_INT128:
+ memcpy (&buf[*bufi], "ti", 2);
+ break;
+ case BT_FLOAT128:
+ memcpy (&buf[*bufi], "tf", 2);
+ break;
+ case BT_DECIMAL32:
+ memcpy (&buf[*bufi], "sd", 2);
+ break;
+ case BT_DECIMAL64:
+ memcpy (&buf[*bufi], "dd", 2);
+ break;
+ case BT_DECIMAL128:
+ memcpy (&buf[*bufi], "td", 2);
+ break;
+ case BT_IBM128:
+ memcpy (&buf[*bufi], "if", 2);
+ break;
+ default:
+ (*diag) ("unhandled basetype %d.\n", typeptr->base);
+ exit (EC_INTERR);
+ }
+
+ *bufi += 2;
+}
+
+/* Build a function type descriptor identifier from the return type
+ and argument types described by PROTOPTR, and store it if it does
+ not already exist. Return the identifier. */
+static char *
+construct_fntype_id (prototype *protoptr)
+{
+ /* Determine the maximum space for a function type descriptor id.
+ Each type requires at most 8 characters (6 for the mode*, 1 for
+ the optional 'u' preceding the mode, and 1 for an underscore
+ following the mode). We also need 5 characters for the string
+ "ftype" that separates the return mode from the argument modes.
+ The last argument doesn't need a trailing underscore, but we
+ count that as the one trailing "ftype" instead. For the special
+ case of zero arguments, we need 8 for the return type and 7
+ for "ftype_v". Finally, we need one character for the
+ terminating null. Thus for a function with N arguments, we
+ need at most 8N+14 characters for N>0, otherwise 16.
+ ----
+ *Worst case is bv16qi for "vector bool char". */
+ int len = protoptr->nargs ? (protoptr->nargs + 1) * 8 + 6 : 16;
+ char *buf = (char *) malloc (len);
+ int bufi = 0;
+
+ if (protoptr->rettype.ispointer)
+ {
+ assert (protoptr->rettype.isvoid);
+ buf[bufi++] = 'p';
+ }
+ if (protoptr->rettype.isvoid)
+ buf[bufi++] = 'v';
+ else
+ {
+ if (protoptr->rettype.isopaque)
+ {
+ memcpy (&buf[bufi], "opaque", 6);
+ bufi += 6;
+ }
+ else
+ {
+ if (protoptr->rettype.isunsigned)
+ buf[bufi++] = 'u';
+ if (protoptr->rettype.isvector)
+ complete_vector_type (&protoptr->rettype, buf, &bufi);
+ else
+ complete_base_type (&protoptr->rettype, buf, &bufi);
+ }
+ }
+
+ memcpy (&buf[bufi], "_ftype", 6);
+ bufi += 6;
+
+ if (!protoptr->nargs)
+ {
+ memcpy (&buf[bufi], "_v", 2);
+ bufi += 2;
+ }
+ else
+ {
+ typelist *argptr = protoptr->args;
+ for (int i = 0; i < protoptr->nargs; i++)
+ {
+ assert (argptr);
+ buf[bufi++] = '_';
+ if (argptr->info.ispointer)
+ {
+ buf[bufi++] = 'p';
+ buf[bufi++] = 'v';
+ }
+ else
+ {
+ if (argptr->info.isopaque)
+ {
+ memcpy (&buf[bufi], "opaque", 6);
+ bufi += 6;
+ }
+ else
+ {
+ if (argptr->info.isunsigned)
+ buf[bufi++] = 'u';
+ if (argptr->info.isvector)
+ complete_vector_type (&argptr->info, buf, &bufi);
+ else
+ complete_base_type (&argptr->info, buf, &bufi);
+ }
+ }
+ argptr = argptr->next;
+ }
+ assert (!argptr);
+ }
+
+ buf[bufi] = '\0';
+
+ /* Ignore return value, as duplicates are expected. */
+ (void) rbt_insert (&fntype_rbt, buf);
+
+ return buf;
+}
+
/* Parse a function prototype. This code is shared by the bif and overload
file processing. */
static parse_codes
@@ -1366,6 +1569,10 @@ parse_bif_entry ()
if (parse_prototype (&bifs[curr_bif].proto) == PC_PARSEFAIL)
return PC_PARSEFAIL;
+ /* Build a function type descriptor identifier from the return type
+ and argument types, and store it if it does not already exist. */
+ bifs[curr_bif].fndecl = construct_fntype_id (&bifs[curr_bif].proto);
+
/* Now process line 2. First up is the builtin id. */
if (!advance_line (bif_file))
{
@@ -1506,6 +1713,10 @@ parse_ovld_entry ()
if (parse_prototype (&ovlds[curr_ovld].proto) == PC_PARSEFAIL)
return PC_PARSEFAIL;
+ /* Build a function type descriptor identifier from the return type
+ and argument types, and store it if it does not already exist. */
+ ovlds[curr_ovld].fndecl = construct_fntype_id (&ovlds[curr_ovld].proto);
+
/* Now process line 2, which just contains the builtin id. */
if (!advance_line (ovld_file))
{
--
2.17.1
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