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Re: ICE in ira.c
Revital1 Eres wrote:
> Hello,
>
> I get the following ICE
> libbackend.a(ira.o): In function `setup_cover_and_important_classes':
> /home/eres/mainline_45/build/gcc/../../gcc/gcc/ira.c:759: undefined
> reference to `regclass_for_constraint'
> collect2: ld returned 1 exit status
> make[2]: *** [cc1-dummy] Error 1
Not really an ICE! Looks like the code is assuming that all backends use at
least one define_register_constraint. (Also, there's a missing '\n' that
probably makes your generated definition of REG_CLASS_FROM_CONSTRAINT look a
bit odd!) How about something like the attached (caution, untested -
bootstrap still in progress)? Let me know if it fixes the problem for you (it
won't get exercised on any target I'm set up to build for) and I'll submit it
to -patches.
cheers,
DaveK
Index: genpreds.c
===================================================================
--- genpreds.c (revision 146543)
+++ genpreds.c (working copy)
@@ -1279,9 +1279,13 @@
puts ("extern enum reg_class regclass_for_constraint "
"(enum constraint_num);\n"
"#define REG_CLASS_FROM_CONSTRAINT(c_,s_) \\\n"
- " regclass_for_constraint (lookup_constraint (s_))\n");
+ " regclass_for_constraint (lookup_constraint (s_))\n"
+ "#define REG_CLASS_FOR_CONSTRAINT(x_) \\\n"
+ " regclass_for_constraint (x_)\n");
else
- puts ("#define REG_CLASS_FROM_CONSTRAINT(c_,s_) NO_REGS");
+ puts ("#define REG_CLASS_FROM_CONSTRAINT(c_,s_) NO_REGS\n"
+ "#define REG_CLASS_FOR_CONSTRAINT(x_) \\\n"
+ " NO_REGS\n");
if (have_const_int_constraints)
puts ("extern bool insn_const_int_ok_for_constraint "
"(HOST_WIDE_INT, enum constraint_num);\n"
Index: ira.c
===================================================================
--- ira.c (revision 146543)
+++ ira.c (working copy)
@@ -756,7 +756,7 @@
continue;
#ifdef CONSTRAINT__LIMIT
for (j = 0; j < CONSTRAINT__LIMIT; j++)
- if ((int) regclass_for_constraint (j) == i)
+ if ((int) REG_CLASS_FOR_CONSTRAINT (j) == i)
break;
if (j < CONSTRAINT__LIMIT)
{