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re PR rtl-optimization/80500 (ICE: internal consistency failure (error: invalid rtl sharing found in the insn)) 

PR rtl-optimization/80500
	* loop-unroll.c (combine_var_copies_in_loop_exit): Call copy_rtx on
	sum's initial value.

	* gcc.dg/pr80500.c: New test.

From-SVN: r247127
This commit is contained in:
Jakub Jelinek 2017-04-25 09:27:47 +02:00 committed by Jakub Jelinek
parent a1f0186093
commit 75092192da
4 changed files with 29 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2017-04-25 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/80500
* loop-unroll.c (combine_var_copies_in_loop_exit): Call copy_rtx on
sum's initial value.
2017-04-24 Martin Liska <mliska@suse.cz>
Backport from mainline

3
gcc/loop-unroll.c
View File

@ -1913,6 +1913,9 @@ combine_var_copies_in_loop_exit (struct var_to_expand *ve, basic_block place)
if (ve->var_expansions.length () == 0)
return;
/* ve->reg might be SUBREG or some other non-shareable RTL, and we use
it both here and as the destination of the assignment. */
sum = copy_rtx (sum);
start_sequence ();
switch (ve->op)
{

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2017-04-25 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/80500
* gcc.dg/pr80500.c: New test.
2017-04-24 Martin Liska <mliska@suse.cz>
Backport from mainline

15
gcc/testsuite/gcc.dg/pr80500.c Normal file
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@ -0,0 +1,15 @@
/* PR rtl-optimization/80500 */
/* { dg-do compile } */
/* { dg-options "-O2 -funroll-loops -ftree-loop-if-convert -fvariable-expansion-in-unroller" } */
signed char v;
void
foo (int x)
{
while (x != 0)
{
v = (x >= 0) + 1;
++x;
}
}