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re PR debug/69244 (ICE in plus_constant, at explow.c:87 on i686-linux-gnu) 

PR debug/69244
	* lra-eliminations.c (move_plus_up): Don't change anything if either
	the outer or inner subreg mode is not MODE_INT.
	* dwarf2out.c (mem_loc_descriptor): For SUBREG, if outer mode is
	integral <= DWARF2_ADDR_SIZE, convert to untyped afterwards.

	* gcc.dg/guality/pr69244.c: New test.

From-SVN: r232382
This commit is contained in:
Jakub Jelinek 2016-01-14 20:57:34 +01:00 committed by Jakub Jelinek
parent 19643948db
commit cd65ae9071
5 changed files with 53 additions and 1 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2016-01-14 Jakub Jelinek <jakub@redhat.com>
PR debug/69244
* lra-eliminations.c (move_plus_up): Don't change anything if either
the outer or inner subreg mode is not MODE_INT.
* dwarf2out.c (mem_loc_descriptor): For SUBREG, if outer mode is
integral <= DWARF2_ADDR_SIZE, convert to untyped afterwards.
2016-01-14 Alan Lawrence <alan.lawrence@arm.com>
* doc/md.texi (reduc_smin_@var{m}, reduc_smax_@var{m},

7
gcc/dwarf2out.c
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@ -13239,6 +13239,13 @@ mem_loc_descriptor (rtx rtl, machine_mode mode,
cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
add_loc_descr (&mem_loc_result, cvt);
if (GET_MODE_CLASS (mode) == MODE_INT
&& GET_MODE_SIZE (mode) <= DWARF2_ADDR_SIZE)
{
/* Convert it to untyped afterwards. */
cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
add_loc_descr (&mem_loc_result, cvt);
}
}
break;

4
gcc/lra-eliminations.c
View File

@ -295,7 +295,9 @@ move_plus_up (rtx x)
subreg_reg_mode = GET_MODE (subreg_reg);
if (GET_CODE (x) == SUBREG && GET_CODE (subreg_reg) == PLUS
&& GET_MODE_SIZE (x_mode) <= GET_MODE_SIZE (subreg_reg_mode)
&& CONSTANT_P (XEXP (subreg_reg, 1)))
&& CONSTANT_P (XEXP (subreg_reg, 1))
&& GET_MODE_CLASS (x_mode) == MODE_INT
&& GET_MODE_CLASS (subreg_reg_mode) == MODE_INT)
{
rtx cst = simplify_subreg (x_mode, XEXP (subreg_reg, 1), subreg_reg_mode,
subreg_lowpart_offset (x_mode,

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2016-01-14 Jakub Jelinek <jakub@redhat.com>
PR debug/69244
* gcc.dg/guality/pr69244.c: New test.
2016-01-14 Uros Bizjak <ubizjak@gmail.com>
* lib/target-supports.exp (check_effective_target_issignaling):

30
gcc/testsuite/gcc.dg/guality/pr69244.c Normal file
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@ -0,0 +1,30 @@
/* PR debug/69244 */
/* { dg-do run } */
/* { dg-options "-g" } */
#include "../nop.h"
union U { float f; int i; };
float a, b;
__attribute__((noinline, noclone)) void
foo (void)
{
asm volatile ("" : : "g" (&a), "g" (&b) : "memory");
}
int
main ()
{
float e = a;
foo ();
float d = e;
union U p;
p.f = d += 2;
int c = p.i - 4;
asm (NOP : : : "memory");
b = c;
return 0;
}
/* { dg-final { gdb-test 25 "c" "p.i-4" } } */