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re PR target/55019 (Incorrectly use live argument register to save high register in thumb1 prologue) 

gcc/
	PR target/55019
	* config/arm/arm.c (thumb1_expand_prologue): Don't push high regs with
	live argument regs.

	gcc/testsuite/
	PR target/55019
	* gcc.dg/pr55019.c: New.

From-SVN: r192703
This commit is contained in:
Terry Guo 2012-10-23 03:49:17 +00:00 committed by Xuepeng Guo
parent e4878d25f3
commit 0b7463235f
4 changed files with 59 additions and 1 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2012-10-23 Terry Guo <terry.guo@arm.com>
PR target/55019
* config/arm/arm.c (thumb1_expand_prologue): Don't push high regs with
live argument regs.
2012-10-23 Hans-Peter Nilsson <hp@bitrange.com>
PR middle-end/55030

8
gcc/config/arm/arm.c
View File

@ -22753,12 +22753,18 @@ thumb1_expand_prologue (void)
{
unsigned pushable_regs;
unsigned next_hi_reg;
unsigned arg_regs_num = TARGET_AAPCS_BASED ? crtl->args.info.aapcs_ncrn
: crtl->args.info.nregs;
unsigned arg_regs_mask = (1 << arg_regs_num) - 1;
for (next_hi_reg = 12; next_hi_reg > LAST_LO_REGNUM; next_hi_reg--)
if (live_regs_mask & (1 << next_hi_reg))
break;
pushable_regs = l_mask & 0xff;
/* Here we need to mask out registers used for passing arguments
even if they can be pushed. This is to avoid using them to stash the high
registers. Such kind of stash may clobber the use of arguments. */
pushable_regs = l_mask & (~arg_regs_mask) & 0xff;
if (pushable_regs == 0)
pushable_regs = 1 << thumb_find_work_register (live_regs_mask);

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2012-10-23 Terry Guo <terry.guo@arm.com>
PR target/55019
* gcc.dg/pr55019.c: New.
2012-10-22 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/55008

41
gcc/testsuite/gcc.dg/pr55019.c Normal file
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@ -0,0 +1,41 @@
/* { dg-do run } */
/* { dg-options "-O1 -funroll-loops" } */
/* { dg-add-options ieee } */
extern void exit (int);
extern void abort (void);
void
compare (double a, double b)
{
do
{
double s1 = __builtin_copysign ((double) 1.0, a);
double s2 = __builtin_copysign ((double) 1.0, b);
if (s1 != s2)
abort ();
if ((__builtin_isnan (a) != 0) != (__builtin_isnan (b) != 0))
abort ();
if ((a != b) != (__builtin_isnan (a) != 0))
abort ();
} while (0);
}
int
main ()
{
double a = 0.0;
double b = 0.0;
_Complex double cr = __builtin_complex (a, b);
static _Complex double cs = __builtin_complex (0.0, 0.0);
compare (__real__ cr, 0.0);
compare (__imag__ cr, 0.0);
compare (__real__ cs, 0.0);
compare (__imag__ cs, 0.0);
exit (0);
}