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re PR rtl-optimization/28243 (internal consistency failure when building fontforge with -O3 -fPIC -ftracer)

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PR rtl-optimization/28243
	* combine.c (distribute_notes) <REG_DEAD>: Do not consider SETs past
	the insn to which the note was originally attached.

From-SVN: r116906
This commit is contained in:
Eric Botcazou 2006-09-12 23:48:40 +02:00 committed by Eric Botcazou
parent ff68219131
commit 7e721950cb
4 changed files with 69 additions and 6 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2006-09-12 Eric Botcazou <ebotcazou@libertysurf.fr>
PR rtl-optimization/28243
* combine.c (distribute_notes) <REG_DEAD>: Do not consider SETs past
the insn to which the note was originally attached.
2006-09-12 Andrew Pinski <pinskia@physics.uc.edu>
Roger Sayle <roger@eyesopen.com>

14
gcc/combine.c
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@ -12165,12 +12165,14 @@ distribute_notes (rtx notes, rtx from_insn, rtx i3, rtx i2, rtx elim_i2,
continue;
}
/* If the register is being set at TEM, see if that is all
TEM is doing. If so, delete TEM. Otherwise, make this
into a REG_UNUSED note instead. Don't delete sets to
global register vars. */
if ((REGNO (XEXP (note, 0)) >= FIRST_PSEUDO_REGISTER
|| !global_regs[REGNO (XEXP (note, 0))])
/* If TEM is a (reaching) definition of the use to which the
note was attached, see if that is all TEM is doing. If so,
delete TEM. Otherwise, make this into a REG_UNUSED note
instead. Don't delete sets to global register vars. */
if ((!from_insn
|| INSN_CUID (tem) < INSN_CUID (from_insn))
&& (REGNO (XEXP (note, 0)) >= FIRST_PSEUDO_REGISTER
|| !global_regs[REGNO (XEXP (note, 0))])
&& reg_set_p (XEXP (note, 0), PATTERN (tem)))
{
rtx set = single_set (tem);

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2006-09-12 Eric Botcazou <ebotcazou@libertysurf.fr>
* gcc.dg/pr28243.c: New test.
2006-09-12 Paul Thomas <pault@gcc.gnu.org>
PR fortran/28971

51
gcc/testsuite/gcc.dg/pr28243.c Normal file
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@ -0,0 +1,51 @@
/* PR rtl-optimization/28243 */
/* Reported by Mike Frysinger <vapier@gentoo.org> */
/* { dg-do compile } */
/* { dg-options "-O2 -ftracer -fPIC" } */
struct displayfuncs {
void (*init) ();
} funcs;
struct gpsdisplay {
struct displayfuncs *funcs;
};
static void PSMyArc(double cx, double cy, double radx, double rady, double sa,
double ta)
{
double ea;
double temp;
ea = sa + ta;
while (sa < ea) {
temp = ((sa + 90) / 90) * 90;
PSDoArc(cx, sa, ea < temp ? ea : temp);
sa = temp;
}
}
static void PSDrawElipse()
{
float cx;
float cy;
float radx;
float rady;
if (radx != rady)
PSMyArc(cx, cy, radx, rady, 0, 360);
}
static void PSDrawFillCircle()
{
PSDrawElipse();
}
static struct displayfuncs psfuncs[] = {
PSDrawFillCircle
};
void _GPSDraw_CreateDisplay()
{
struct gpsdisplay *gdisp;
gdisp->funcs = (void *)&psfuncs;
}