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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/43996] ICE in gfc_conv_array_initializer due to incomplete simplification of init expressions
Date: Wed, 30 Apr 2014 12:31:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43996

--- Comment #16 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The following patch fixes the ICE without reverting the fix for pr40472:

--- ../_clean/gcc/fortran/simplify.c    2014-04-27 12:52:10.000000000 +0200
+++ gcc/fortran/simplify.c    2014-04-30 14:23:46.000000000 +0200
@@ -5939,7 +6021,8 @@ gfc_simplify_spread (gfc_expr *source, g
   else
     mpz_init_set_ui (size, 1);

-  if (mpz_get_si (size)*ncopies > gfc_option.flag_max_array_constructor)
+  if (!gfc_init_expr_flag
+      && mpz_get_si (size)*ncopies > gfc_option.flag_max_array_constructor)
     return NULL;

   if (source->expr_type == EXPR_CONSTANT)

Indeed compiling the test in comment 8 gives

Error: The number of elements in the array constructor at (1) requires an
increase of the allowed 65535 upper limit.   See -fmax-array-constructor option

even if ", PARAMETER" is removed in the line

  INTEGER, PARAMETER :: C(N, N) = MATMUL(A, B)

IMO the fix for SPREAD should be extended to all the intrinsics allowed for
initialization.