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tree-tailcall.c (decrease_profile): New function.

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* tree-tailcall.c (decrease_profile): New function.
	(eliminate_tail_call): Use it.

	* inliner-1.c: Add cleanup of dumps.
	* val-prof-*.c: Likewise.
	* update-tailcall.c: New.

From-SVN: r102416
This commit is contained in:
Jan Hubicka 2005-07-27 09:40:25 +02:00 committed by Jan Hubicka
parent 57a7370922
commit 2350455936
9 changed files with 68 additions and 0 deletions
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3
gcc/ChangeLog
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@ -1,5 +1,8 @@
2005-07-27 Jan Hubicka <jh@suse.cz>
* tree-tailcall.c (decrease_profile): New function.
(eliminate_tail_call): Use it.
* cgraphunit.c (cgraph_function_and_variable_visibility): Set
visibility flags correctly in whole program mode.

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2005-07-27 Jan Hubicka <jh@suse.cz>
* inliner-1.c: Add cleanup of dumps.
* val-prof-*.c: Likewise.
* update-tailcall.c: New.
2005-07-26 Diego Novillo <dnovillo@redhat.com>
PR 22591

1
gcc/testsuite/gcc.dg/tree-prof/inliner-1.c
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@ -35,3 +35,4 @@ main ()
declaration or other apperances of the string in dump. */
/* { dg-final-use { scan-tree-dump "cold_function ..;" "optimized"} } */
/* { dg-final-use { scan-tree-dump-not "hot_function ..;" "optimized"} } */
/* { dg-final-use { cleanup-tree-dump "optimized" } } */

20
gcc/testsuite/gcc.dg/tree-prof/update-tailcall.c Normal file
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@ -0,0 +1,20 @@
/* { dg-options "-O2 -fdump-tree-tailcall -fdump-tree-optimized" } */
__attribute__ ((noinline))
int factorial(int x)
{
if (x == 1)
return 1;
else
return x*factorial(--x);
}
int gbl;
int
main()
{
gbl = factorial(100);
return 0;
}
/* { dg-final-use { scan-tree-dump-not "Invalid sum" "tailc"} } */
/* { dg-final-use { scan-tree-dump-not "Invalid sum" "optimized"} } */
/* { dg-final-use { cleanup-tree-dump "tailc" } } */
/* { dg-final-use { cleanup-tree-dump "optimized" } } */

2
gcc/testsuite/gcc.dg/tree-prof/val-prof-1.c
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@ -18,3 +18,5 @@ main ()
/* { dg-final-use { scan-tree-dump "Div.mod by constant n=257 transformation on insn" "tree_profile"} } */
/* { dg-final-use { scan-tree-dump "if \\(n != 257\\)" "optimized"} } */
/* { dg-final-use { scan-tree-dump-not "Invalid sum" "optimized"} } */
/* { dg-final-use { cleanup-tree-dump "optimized" } } */
/* { dg-final-use { cleanup-tree-dump "tree_profile" } } */

2
gcc/testsuite/gcc.dg/tree-prof/val-prof-2.c
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@ -28,3 +28,5 @@ main ()
didn't get optimized out. */
/* { dg-final-use { scan-tree-dump "n \\+ \\-1" "optimized"} } */
/* { dg-final-use { scan-tree-dump-not "Invalid sum" "optimized"} } */
/* { dg-final-use { cleanup-tree-dump "optimized" } } */
/* { dg-final-use { cleanup-tree-dump "tree_profile" } } */

2
gcc/testsuite/gcc.dg/tree-prof/val-prof-3.c
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@ -28,3 +28,5 @@ main ()
didn't get optimized out. */
/* { dg-final-use { scan-tree-dump "if \\(n \\>" "optimized"} } */
/* { dg-final-use { scan-tree-dump-not "Invalid sum" "optimized"} } */
/* { dg-final-use { cleanup-tree-dump "optimized" } } */
/* { dg-final-use { cleanup-tree-dump "tree_profile" } } */

2
gcc/testsuite/gcc.dg/tree-prof/val-prof-4.c
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@ -28,3 +28,5 @@ main ()
didn't get optimized out. */
/* { dg-final-use { scan-tree-dump "if \\(n \\>" "optimized"} } */
/* { dg-final-use { scan-tree-dump-not "Invalid sum" "optimized"} } */
/* { dg-final-use { cleanup-tree-dump "optimized" } } */
/* { dg-final-use { cleanup-tree-dump "tree_profile" } } */

30
gcc/tree-tailcall.c
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@ -668,6 +668,29 @@ adjust_return_value (basic_block bb, tree m, tree a)
update_stmt (ret_stmt);
}
/* Subtract COUNT and FREQUENCY from the basic block and it's
outgoing edge. */
static void
decrease_profile (basic_block bb, gcov_type count, int frequency)
{
edge e;
bb->count -= count;
if (bb->count < 0)
bb->count = 0;
bb->frequency -= frequency;
if (bb->frequency < 0)
bb->frequency = 0;
if (!single_succ_p (bb))
{
gcc_assert (!EDGE_COUNT (bb->succs));
return;
}
e = single_succ_edge (bb);
e->count -= count;
if (e->count < 0)
e->count = 0;
}
/* Eliminates tail call described by T. TMP_VARS is a list of
temporary variables used to copy the function arguments. */
@ -717,6 +740,13 @@ eliminate_tail_call (struct tailcall *t)
release_defs (t);
}
/* Number of executions of function has reduced by the tailcall. */
e = single_succ_edge (t->call_block);
decrease_profile (EXIT_BLOCK_PTR, e->count, EDGE_FREQUENCY (e));
decrease_profile (ENTRY_BLOCK_PTR, e->count, EDGE_FREQUENCY (e));
if (e->dest != EXIT_BLOCK_PTR)
decrease_profile (e->dest, e->count, EDGE_FREQUENCY (e));
/* Replace the call by a jump to the start of function. */
e = redirect_edge_and_branch (single_succ_edge (t->call_block), first);
gcc_assert (e);