From 9d0dcda15ccb43b5b24b370e793142736d5742d3 Mon Sep 17 00:00:00 2001 From: Alexander Monakov Date: Wed, 15 Dec 2010 16:08:41 +0300 Subject: re PR rtl-optimization/46649 (ICE: in move_bb_info, at sel-sched-ir.c:5080 with -fschedule-insns -fselective-scheduling) PR rtl-optimization/46649 * sel-sched-ir.c (purge_empty_blocks): Unconditionally skip the first basic block in the region. testsuite: * g++.dg/opt/pr46649.C: New. From-SVN: r167854 --- gcc/ChangeLog | 6 ++++++ gcc/sel-sched-ir.c | 6 +++--- gcc/testsuite/ChangeLog | 5 +++++ gcc/testsuite/g++.dg/opt/pr46649.C | 9 +++++++++ 4 files changed, 23 insertions(+), 3 deletions(-) create mode 100644 gcc/testsuite/g++.dg/opt/pr46649.C (limited to 'gcc') diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 68ac27b..9832ed1 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2010-12-15 Alexander Monakov + + PR rtl-optimization/46649 + * sel-sched-ir.c (purge_empty_blocks): Unconditionally skip the first + basic block in the region. + 2010-12-15 Joseph Myers * config/stormy16/stormy16.h (LINK_SPEC, WCHAR_TYPE): Define. diff --git a/gcc/sel-sched-ir.c b/gcc/sel-sched-ir.c index 468dfd7..43619d9 100644 --- a/gcc/sel-sched-ir.c +++ b/gcc/sel-sched-ir.c @@ -3766,10 +3766,10 @@ tidy_control_flow (basic_block xbb, bool full_tidying) void purge_empty_blocks (void) { - /* Do not attempt to delete preheader. */ - int i = sel_is_loop_preheader_p (BASIC_BLOCK (BB_TO_BLOCK (0))) ? 1 : 0; + int i; - while (i < current_nr_blocks) + /* Do not attempt to delete the first basic block in the region. */ + for (i = 1; i < current_nr_blocks; ) { basic_block b = BASIC_BLOCK (BB_TO_BLOCK (i)); diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index dc836ec..d61278c 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2010-12-15 Alexander Monakov + + PR rtl-optimization/46649 + * g++.dg/opt/pr46649.C: New. + 2010-12-15 Dave Korn PR testsuite/46938 diff --git a/gcc/testsuite/g++.dg/opt/pr46649.C b/gcc/testsuite/g++.dg/opt/pr46649.C new file mode 100644 index 0000000..1428e8b --- /dev/null +++ b/gcc/testsuite/g++.dg/opt/pr46649.C @@ -0,0 +1,9 @@ +// { dg-do compile { target powerpc*-*-* ia64-*-* x86_64-*-* } } +// { dg-options "-fschedule-insns -fselective-scheduling" } + +void foo () +{ + for (;;) + for (;;({break;})) + ; +} -- cgit v1.1