From 0ffd2048ea67899080038ca4fba0387c6b9d2d3c Mon Sep 17 00:00:00 2001 From: Michael Matz Date: Sat, 26 Sep 2009 16:46:43 +0000 Subject: [PATCH] re PR lto/40758 ([LTO] ICE in partition_view_bitmap, at tree-ssa-live.c:331) PR lto/40758 PR middle-end/41470 * tree-ssa-coalesce.c (coalesce_ssa_name): Add only SSA names that are mentioned in the body. testsuite/ * gcc.dg/pr41470.c: New test. From-SVN: r152203 --- gcc/ChangeLog | 7 +++++++ gcc/testsuite/ChangeLog | 6 ++++++ gcc/testsuite/gcc.dg/pr41470.c | 18 ++++++++++++++++++ gcc/tree-ssa-coalesce.c | 5 ++++- 4 files changed, 35 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gcc.dg/pr41470.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9e6e39806246..368899e1d585 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2009-09-26 Michael Matz + + PR lto/40758 + PR middle-end/41470 + * tree-ssa-coalesce.c (coalesce_ssa_name): Add only SSA names + that are mentioned in the body. + 2009-09-26 Michael Matz PR tree-optimization/41454 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 2bfffbe83407..5f7fdf13dd6d 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,9 @@ +2009-09-26 Michael Matz + + PR lto/40758 + PR middle-end/41470 + * gcc.dg/pr41470.c: New test. + 2009-09-26 Eric Botcazou * gnat.dg/array9.adb: New test. diff --git a/gcc/testsuite/gcc.dg/pr41470.c b/gcc/testsuite/gcc.dg/pr41470.c new file mode 100644 index 000000000000..1c029b481bf2 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr41470.c @@ -0,0 +1,18 @@ +/* { dg-do compile } */ +/* { dg-options "-fexceptions" } */ +void * +af (void *a) +{ + return a; +} +void +bf (void) +{ + void *p; + { + int i = 1; + char v[i]; + p = af (v); + } + cf (p); +} diff --git a/gcc/tree-ssa-coalesce.c b/gcc/tree-ssa-coalesce.c index 0164eca7ddbd..5841aa07522e 100644 --- a/gcc/tree-ssa-coalesce.c +++ b/gcc/tree-ssa-coalesce.c @@ -1377,7 +1377,10 @@ coalesce_ssa_name (void) { tree a = ssa_name (i); - if (a && SSA_NAME_VAR (a) && !DECL_ARTIFICIAL (SSA_NAME_VAR (a))) + if (a + && SSA_NAME_VAR (a) + && !DECL_ARTIFICIAL (SSA_NAME_VAR (a)) + && (!has_zero_uses (a) || !SSA_NAME_IS_DEFAULT_DEF (a))) { tree *slot = (tree *) htab_find_slot (ssa_name_hash, a, INSERT);