[Bug tree-optimization/49161] [4.5/4.6/4.7 Regression] Fix VRP on switch stmts

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49161

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-05-26 
10:20:37 UTC ---
Author: jakub
Date: Thu May 26 10:20:34 2011
New Revision: 174272

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=174272
Log:
    PR tree-optimization/49161
    * tree-vrp.c (struct case_info): New type.
    (compare_case_labels): Sort case_info structs instead of
    trees, and not primarily by CASE_LABEL uids but by
    label_for_block indexes.
    (find_switch_asserts): Put case labels into struct case_info
    array instead of TREE_VEC, adjust sorting, compare label_for_block
    values instead of CASE_LABELs.

    * gcc.c-torture/execute/pr49161.c: New test.

Added:
    branches/gcc-4_6-branch/gcc/testsuite/gcc.c-torture/execute/pr49161.c
Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_6-branch/gcc/tree-vrp.c