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Insert diverging jump alap in nvptx_single

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2017-07-17  Tom de Vries  <tom@codesourcery.com>

	PR target/81069
	* config/nvptx/nvptx.c (nvptx_single): Insert diverging branch as late
	as possible.

From-SVN: r250256
This commit is contained in:
Tom de Vries 2017-07-17 07:49:22 +00:00 • committed by Tom de Vries
parent 42ec024baa
commit ed9091b270
2 changed files with 25 additions and 3 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2017-07-17 Tom de Vries <tom@codesourcery.com>
PR target/81069
* config/nvptx/nvptx.c (nvptx_single): Insert diverging branch as late
as possible.
2017-07-17 Sebastian Huber <sebastian.huber@embedded-brains.de>
* gcc/config/sparc/rtemself.h (TARGET_OS_CPP_BUILTINS): Add

22
gcc/config/nvptx/nvptx.c
View file

@ -3886,9 +3886,25 @@ nvptx_single (unsigned mask, basic_block from, basic_block to)
rtx_insn *tail = BB_END (to);
unsigned skip_mask = mask;
/* Find first insn of from block */
while (head != BB_END (from) && !INSN_P (head))
head = NEXT_INSN (head);
while (true)
{
/* Find first insn of from block. */
while (head != BB_END (from) && !INSN_P (head))
head = NEXT_INSN (head);
if (from == to)
break;
if (!(JUMP_P (head) && single_succ_p (from)))
break;
basic_block jump_target = single_succ (from);
if (!single_pred_p (jump_target))
break;
from = jump_target;
head = BB_HEAD (from);
}
/* Find last insn of to block */
rtx_insn *limit = from == to ? head : BB_HEAD (to);