OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

[RTL ifcvt] PR 67786, 67787: Check that intermediate instructions in the basic block don't clobber a reg used in condition

Browse Source 
PR rtl-optimization/67786
        PR rtl-optimization/67787
        * ifcvt.c (bb_valid_for_noce_process_p): Reject basic block if
        it modifies a reg used in the condition calculation.

        * gcc.dg/pr67786.c: New test.
        * gcc.dg/pr67787.c: Likewise.

From-SVN: r228375
This commit is contained in:
Kyrylo Tkachov 2015-10-02 08:36:45 +00:00 committed by Kyrylo Tkachov
parent c0233c783d
commit 6b7e867187
5 changed files with 79 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2015-10-02 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR rtl-optimization/67786
PR rtl-optimization/67787
* ifcvt.c (bb_valid_for_noce_process_p): Reject basic block if
it modifies a reg used in the condition calculation.
2015-10-02 James Greenhalgh <james.greenhalgh@arm.com>
* config/aarch64/aarch64-simd.md (*aarch64_combinez<mode>): Add

3
gcc/ifcvt.c
View File

@ -3003,7 +3003,8 @@ bb_valid_for_noce_process_p (basic_block test_bb, rtx cond,
gcc_assert (sset);
if (contains_mem_rtx_p (SET_SRC (sset))
|| !REG_P (SET_DEST (sset)))
|| !REG_P (SET_DEST (sset))
|| reg_overlap_mentioned_p (SET_DEST (sset), cond))
goto free_bitmap_and_fail;
potential_cost += insn_rtx_cost (sset, speed_p);

7
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,10 @@
2015-10-02 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR rtl-optimization/67786
PR rtl-optimization/67787
* gcc.dg/pr67786.c: New test.
* gcc.dg/pr67787.c: Likewise.
2015-10-02 James Greenhalgh <james.greenhalgh@arm.com>
* gcc.target/aarch64/vect_combine_zeroes_1.c: New.

20
gcc/testsuite/gcc.dg/pr67786.c Normal file
View File

@ -0,0 +1,20 @@
/* { dg-do run } */
/* { dg-options "-O3" } */
int a, b = 10;
char c;
int
main ()
{
char d;
int e = 5;
for (a = 0; a; a--)
e = 0;
c = (b & 15) ^ e;
d = c > e ? c : c << e;
__builtin_printf ("%d\n", d);
return 0;
}
/* { dg-output "15" } */

43
gcc/testsuite/gcc.dg/pr67787.c Normal file
View File

@ -0,0 +1,43 @@
/* { dg-do run } */
/* { dg-options "-O3" } */
int a, c, f, g;
char b;
static int
fn1 ()
{
char h;
int k = -1, i, j;
for (; b < 16; b++)
;
__builtin_printf (" ");
if (b < 5)
k++;
if (k)
{
int l = 2;
a = h = b < 0 || b > (127 >> l) ? b : b << 1;
return 0;
}
for (i = 0; i < 1; i++)
for (j = 0; j < 7; j++)
f = 0;
for (c = 0; c; c++)
;
if (g)
for (;;)
;
return 0;
}
int
main ()
{
fn1 ();
if (a != 32)
__builtin_abort ();
return 0;
}