[Bug c++/37217] [4.4 Regression] -Wconversion causes ICE with __builtin_strcmp with one char compare

[burnus at gcc dot gnu dot org]

------- Comment #4 from burnus at gcc dot gnu dot org  2008-08-25 08:26 -------
My PR 37230 is presumably a duplicate of this PR. There, valgrind shows for
"gcc -Wconcersion":

==26156== Invalid read of size 2
==26156==    at 0x458558: conversion_warning (c-common.c:1571)
==26156==    by 0x4593F7: convert_and_check (c-common.c:1839)
==26156==    by 0x42BF71: build_binary_op (c-typeck.c:8434)

1571 is this line:
  1566    /* If any operand is artificial, then this expression was generated
  1567       by the compiler and we do not warn.  */
  1568    for (i = 0; i < expr_num_operands; i++)
  1569      {
  1570        tree op = TREE_OPERAND (expr, i);
  1571        if (DECL_P (op) && DECL_ARTIFICIAL (op))
  1572          return;
  1573      }

Working: 2008-08-20-r139252
Failing: 2008-08-21-r139367
Failing: 20080824 (experimental) [trunk revision 139535]


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37217