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re PR rtl-optimization/47028 (gcc.dg/tree-ssa/tailrecursion-[57].c FAIL with -foptimize-sibling-calls -fno-forward-propagate -fno-tree-copy-prop -fno-tree-dominator-opts)

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PR rtl-optimization/47028
	* cfgexpand.c (gimple_expand_cfg): Insert entry edge
	insertions after parm_birth_insn instead of at the beginning
	of first bb.

	* gcc.dg/pr47028.c: New test.

From-SVN: r168401
This commit is contained in:
Jakub Jelinek 2011-01-02 18:07:15 +01:00 committed by Jakub Jelinek
parent 7dfef5845a
commit bc470c243a
4 changed files with 44 additions and 1 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2011-01-02 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/47028
* cfgexpand.c (gimple_expand_cfg): Insert entry edge
insertions after parm_birth_insn instead of at the beginning
of first bb.
2011-01-02 Mingjie Xing <mingjie.xing@gmail.com>
* doc/generic.texi: Remove duplicated "@subsubsection Statements".

14
gcc/cfgexpand.c
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@ -4085,7 +4085,19 @@ gimple_expand_cfg (void)
for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); )
{
if (e->insns.r)
commit_one_edge_insertion (e);
{
/* Avoid putting insns before parm_birth_insn. */
if (e->src == ENTRY_BLOCK_PTR
&& single_succ_p (ENTRY_BLOCK_PTR)
&& parm_birth_insn)
{
rtx insns = e->insns.r;
e->insns.r = NULL_RTX;
emit_insn_after_noloc (insns, parm_birth_insn, e->dest);
}
else
commit_one_edge_insertion (e);
}
else
ei_next (&ei);
}

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2011-01-02 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/47028
* gcc.dg/pr47028.c: New test.
2011-01-02 Nicola Pero <nicola.pero@meta-innovation.com>
* objc.dg/protocol-forward-1.m: Removed TODO.

19
gcc/testsuite/gcc.dg/pr47028.c Normal file
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@ -0,0 +1,19 @@
/* PR rtl-optimization/47028 */
/* { dg-do run } */
/* { dg-options "-O -foptimize-sibling-calls -fno-forward-propagate -fno-tree-copy-prop -fno-tree-dominator-opts" } */
int
fib (int n)
{
if (n <= 1)
return 1;
return fib (n - 2) + fib (n - 1);
}
int
main (void)
{
if (fib (5) != 8)
__builtin_abort ();
return 0;
}