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re PR debug/67043 (-fcompare-debug failure with -O3)

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2015-08-04  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    PR tree-optimization/67043
    * loop-invariant.c (move_invariant_reg): Recompute luids in loop
    preheader after hoisting invariant in it.
    (find_defs): Force recomputation of all luids.

    gcc/testsuite/
    PR tree-optimization/67043
    * gcc.dg/pr67043.c: New test.

From-SVN: r226540
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Thomas Preud'homme 2015-08-04 02:11:58 +00:00 committed by Thomas Preud'homme
parent 9ebddeb045
commit 43d56ad78d
4 changed files with 47 additions and 0 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2015-08-04 Thomas Preud'homme <thomas.preudhomme@arm.com>
PR tree-optimization/67043
* loop-invariant.c (move_invariant_reg): Recompute luids in loop
preheader after hoisting invariant in it.
(find_defs): Force recomputation of all luids.
2015-08-03 Peter Bergner <bergner@vnet.ibm.com>
* config/rs6000/htm.md (tabort.): Restrict the source operand to

3
gcc/loop-invariant.c
View File

@ -676,6 +676,8 @@ find_defs (struct loop *loop)
df_remove_problem (df_chain);
df_process_deferred_rescans ();
df_chain_add_problem (DF_UD_CHAIN);
df_live_add_problem ();
df_live_set_all_dirty ();
df_set_flags (DF_RD_PRUNE_DEAD_DEFS);
df_analyze_loop (loop);
check_invariant_table_size ();
@ -1629,6 +1631,7 @@ move_invariant_reg (struct loop *loop, unsigned invno)
fprintf (dump_file, "Invariant %d moved without introducing a new "
"temporary register\n", invno);
reorder_insns (inv->insn, inv->insn, BB_END (preheader));
df_recompute_luids (preheader);
/* If there is a REG_EQUAL note on the insn we just moved, and the
insn is in a basic block that is not always executed or the note

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2015-08-04 Thomas Preud'homme <thomas.preudhomme@arm.com>
PR tree-optimization/67043
* gcc.dg/pr67043.c: New test.
2015-08-03 Peter Bergner <bergner@vnet.ibm.com>
* gcc.target/powerpc/htm-tabort-no-r0.c: New test.

32
gcc/testsuite/gcc.dg/pr67043.c Normal file
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@ -0,0 +1,32 @@
/* { dg-do compile } */
/* { dg-options "-O3 -fcompare-debug -w" } */
extern void rt_mutex_owner (void);
extern void rt_mutex_deadlock_account_lock (int);
extern void signal_pending (void);
__typeof__ (int *) a;
int b;
int
try_to_take_rt_mutex (int p1) {
rt_mutex_owner ();
if (b)
return 0;
rt_mutex_deadlock_account_lock (p1);
return 1;
}
void
__rt_mutex_slowlock (int p1) {
int c;
for (;;) {
c = ({
asm ("" : "=r"(a));
a;
});
if (try_to_take_rt_mutex (c))
break;
if (__builtin_expect (p1 == 0, 0))
signal_pending ();
}
}