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re PR rtl-optimization/46755 (ICE: in calc_dfs_tree, at dominance.c:395 with -O)

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gcc/
	PR rtl-optimization/46755
	* ira.c (ira): If some dead edges were removed, find and delete
	any blocks that might have become unreachable.

testsuite/
	PR rtl-optimization/46755
	* gfortran.dg/pr46755.f: New test

From-SVN: r168118
This commit is contained in:
Steven Bosscher 2010-12-21 14:55:41 +00:00
parent 96676a5df7
commit 59db109afd
4 changed files with 36 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2010-12-21 Steven Bosscher <steven@gcc.gnu.org>
PR rtl-optimization/46755
* ira.c (ira): If some dead edges were removed, find and delete
any blocks that might have become unreachable.
2010-12-21 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/47008

3
gcc/ira.c
View File

@ -3158,7 +3158,8 @@ ira (FILE *f)
{
timevar_push (TV_JUMP);
rebuild_jump_labels (get_insns ());
purge_all_dead_edges ();
if (purge_all_dead_edges ())
delete_unreachable_blocks ();
timevar_pop (TV_JUMP);
}
}

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2010-12-21 Steven Bosscher <steven@gcc.gnu.org>
PR rtl-optimization/46755
* gfortran.dg/pr46755.f: New test.
2010-12-21 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/47008

23
gcc/testsuite/gfortran.dg/pr46755.f Normal file
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@ -0,0 +1,23 @@
C { dg-do compile }
C { dg-options "-O" }
IMPLICIT NONE
INTEGER I640,I760,I800
INTEGER I,ITER,ITMX,LENCM
LOGICAL QDISK,QDW
ASSIGN 801 TO I800
GOTO I800
801 CONTINUE
ASSIGN 761 TO I760
761 CONTINUE
DO I=1,LENCM
ENDDO
DO WHILE(ITER.LT.ITMX)
IF(QDW) THEN
ASSIGN 641 to I640
GOTO I760
641 CONTINUE
ENDIF
ENDDO
RETURN
END