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[arm] PR target/82975: Guard against reg_renumber being NULL in arm.h

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Backport from mainline
	2017-12-20  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

	PR target/82975
	* config/arm/arm.h (TEST_REGNO): Adjust comment as expected in r255830.

	* gcc.dg/pr82975.c: New test.

From-SVN: r256350
This commit is contained in:
Kyrylo Tkachov 2018-01-08 18:42:50 +00:00 committed by Kyrylo Tkachov
parent 2fc75a03b0
commit 9192145f0b
4 changed files with 39 additions and 5 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2018-01-08 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Backport from mainline
2017-12-20 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR target/82975
* config/arm/arm.h (TEST_REGNO): Adjust comment as expected in r255830.
2018-01-08 Sebastian Huber <sebastian.huber@embedded-brains.de>
Backported from mainline

8
gcc/config/arm/arm.h
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@ -1662,12 +1662,10 @@ enum arm_auto_incmodes
/* These assume that REGNO is a hard or pseudo reg number.
They give nonzero only if REGNO is a hard reg of the suitable class
or a pseudo reg currently allocated to a suitable hard reg.
Since they use reg_renumber, they are safe only once reg_renumber
has been allocated, which happens in reginfo.c during register
allocation. */
or a pseudo reg currently allocated to a suitable hard reg. */
#define TEST_REGNO(R, TEST, VALUE) \
((R TEST VALUE) || ((unsigned) reg_renumber[R] TEST VALUE))
((R TEST VALUE) \
|| (reg_renumber && ((unsigned) reg_renumber[R] TEST VALUE)))
/* Don't allow the pc to be used. */
#define ARM_REGNO_OK_FOR_BASE_P(REGNO) \

8
gcc/testsuite/ChangeLog
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@ -1,3 +1,11 @@
2018-01-08 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Backport from mainline
2017-12-19 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR target/82975
* gcc.dg/pr82975.c: New test.
2018-01-04 Uros Bizjak <ubizjak@gmail.com>
PR target/83628

20
gcc/testsuite/gcc.dg/pr82975.c Normal file
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@ -0,0 +1,20 @@
/* PR target/82975. */
/* { dg-do compile } */
/* { dg-options "-fno-sched-pressure -O2" } */
/* { dg-additional-options "-mtune=cortex-a57" { target arm*-*-* aarch64*-*-* } } */
typedef __SIZE_TYPE__ size_t;
struct S1
{
char pad1;
char val;
short pad2;
};
extern char t[256];
void foo (struct S1 a, size_t i)
{
t[i] = a.val;
}