From 83ba4d6f2be5937e715f2638085906c06a9989ea Mon Sep 17 00:00:00 2001 From: Richard Biener Date: Tue, 29 Jan 2013 10:40:24 +0000 Subject: [PATCH] re PR rtl-optimization/55270 (ICE in get_loop_body, at cfgloop.c:823) 2013-01-29 Richard Biener PR tree-optimization/55270 * tree-ssa-dom.c (eliminate_degenerate_phis): If we changed the CFG, schedule loops for fixup. * gcc.dg/torture/pr55270.c: New testcase. From-SVN: r195533 --- gcc/ChangeLog | 6 ++++++ gcc/testsuite/ChangeLog | 5 +++++ gcc/testsuite/gcc.dg/torture/pr55270.c | 22 ++++++++++++++++++++++ gcc/tree-ssa-dom.c | 7 ++++++- 4 files changed, 39 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gcc.dg/torture/pr55270.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index bf77fb0d1d0..4765ab792ce 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2013-01-29 Richard Biener + + PR tree-optimization/55270 + * tree-ssa-dom.c (eliminate_degenerate_phis): If we changed + the CFG, schedule loops for fixup. + 2013-01-29 Nick Clifton * config/rl78/rl78.c (rl78_regno_mode_code_ok_for_base_p): Allow diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index ebc18d9bd27..936053fc22a 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2013-01-29 Richard Biener + + PR tree-optimization/55270 + * gcc.dg/torture/pr55270.c: New testcase. + 2013-01-28 Jakub Jelinek PR rtl-optimization/56117 diff --git a/gcc/testsuite/gcc.dg/torture/pr55270.c b/gcc/testsuite/gcc.dg/torture/pr55270.c new file mode 100644 index 00000000000..0b7f906d046 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr55270.c @@ -0,0 +1,22 @@ +/* { dg-do compile } */ + +unsigned a, b, c; + +void f(void) +{ + for(; a; a++) + { + long *p1 = (long *)&b; + + if(*p1) + return; + + if(b && (*p1 = b) || c && ++*p1) + { + unsigned *p2 = &b; + + for(*p2 = 0; *p2 < 1;) + for(; b; b++); + } + } +} diff --git a/gcc/tree-ssa-dom.c b/gcc/tree-ssa-dom.c index dfb908d0d62..e8b15514578 100644 --- a/gcc/tree-ssa-dom.c +++ b/gcc/tree-ssa-dom.c @@ -3006,7 +3006,12 @@ eliminate_degenerate_phis (void) } if (cfg_altered) - free_dominance_info (CDI_DOMINATORS); + { + free_dominance_info (CDI_DOMINATORS); + /* If we changed the CFG schedule loops for fixup by cfgcleanup. */ + if (current_loops) + loops_state_set (LOOPS_NEED_FIXUP); + } /* Propagation of const and copies may make some EH edges dead. Purge such edges from the CFG as needed. */