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

Backport: 

2009-06-16  J"orn Rennecke  <joern.rennecke@arc.com>
		    Janis Johnson  <janis187@us.ibm.com>

	PR target/39254
	* config/rs6000/rs6000.c (rs6000_emit_move): Don't emit a USE
	for the symbol ref of a constant that is the source of a move
	- nor for any other not-obvious-label-ref constants.

From-SVN: r157780
This commit is contained in:
Kaveh R. Ghazi 2010-03-27 18:56:08 +00:00 committed by Kaveh Ghazi
parent b732aef992
commit 0523c835ba
2 changed files with 11 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
gcc/ChangeLog
View File

@ -1,3 +1,14 @@
2010-03-27 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
Backport:
2009-06-16 J"orn Rennecke <joern.rennecke@arc.com>
Janis Johnson <janis187@us.ibm.com>
PR target/39254
* config/rs6000/rs6000.c (rs6000_emit_move): Don't emit a USE
for the symbol ref of a constant that is the source of a move
- nor for any other not-obvious-label-ref constants.
2010-03-27 Uros Bizjak <ubizjak@gmail.com>
PR target/42113

8
gcc/config/rs6000/rs6000.c
View File

@ -5232,14 +5232,6 @@ rs6000_emit_move (rtx dest, rtx source, enum machine_mode mode)
&& ! legitimate_constant_pool_address_p (operands[1])
&& ! toc_relative_expr_p (operands[1]))
{
/* Emit a USE operation so that the constant isn't deleted if
expensive optimizations are turned on because nobody
references it. This should only be done for operands that
contain SYMBOL_REFs with CONSTANT_POOL_ADDRESS_P set.
This should not be done for operands that contain LABEL_REFs.
For now, we just handle the obvious case. */
if (GET_CODE (operands[1]) != LABEL_REF)
emit_use (operands[1]);
#if TARGET_MACHO
/* Darwin uses a special PIC legitimizer. */