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re PR rtl-optimization/88033 (ICE on valid code at -O2 and -O3 on x86-64-linux-gnu: in remove_some_program_points_and_update_live_ranges, at lra-lives.c:1179) 

gcc/
	PR rtl-optimization/88033
	* ira-lives.c (non_conflicting_reg_copy_p): Skip copies from a register
	to itself.  Use HARD_REGISTER_NUM_P.

gcc/testsuite/
	PR rtl-optimization/88033
	* gcc.target/i386/pr88033.c: New test.

From-SVN: r266282
This commit is contained in:
Peter Bergner 2018-11-19 19:35:51 +00:00 committed by Peter Bergner
parent 1fd319753c
commit 4b0f04fba5
4 changed files with 33 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2018-11-19 Peter Bergner <bergner@linux.ibm.com>
PR rtl-optimization/88033
* ira-lives.c (non_conflicting_reg_copy_p): Skip copies from a register
to itself. Use HARD_REGISTER_NUM_P.
2018-11-19 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
* tree-vect-loop.c (vect_transform_loop): Disable further unrolling

10
gcc/ira-lives.c
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@ -1083,11 +1083,17 @@ non_conflicting_reg_copy_p (rtx_insn *insn)
int src_regno = REGNO (SET_SRC (set));
machine_mode mode = GET_MODE (SET_DEST (set));
/* By definition, a register does not conflict with itself, therefore we
do not have to handle it specially. Returning NULL_RTX now, helps
simplify the callers of this function. */
if (dst_regno == src_regno)
return NULL_RTX;
/* Computing conflicts for register pairs is difficult to get right, so
for now, disallow it. */
if ((dst_regno < FIRST_PSEUDO_REGISTER
if ((HARD_REGISTER_NUM_P (dst_regno)
&& hard_regno_nregs (dst_regno, mode) != 1)
|| (src_regno < FIRST_PSEUDO_REGISTER
|| (HARD_REGISTER_NUM_P (src_regno)
&& hard_regno_nregs (src_regno, mode) != 1))
return NULL_RTX;

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2018-11-19 Peter Bergner <bergner@linux.ibm.com>
PR rtl-optimization/88033
* gcc.target/i386/pr88033.c: New test.
2018-11-19 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
* gcc.target/aarch64/sve/unroll-1.c: New test.

14
gcc/testsuite/gcc.target/i386/pr88033.c Normal file
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@ -0,0 +1,14 @@
/* { dg-do compile } */
/* { dg-options "-O2" } */
int
main (long a, long *b, long c)
{
if (!c)
return 0;
int g;
*b = (g & ~3000000000) < 0 ? a : a - g;
while (1)
;
return 0;
}