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re PR target/52107 (IBM 128bit long double constant loaded inefficiently)

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PR target/52107
	* config/rs6000/rs6000.c (rs6000_emit_move): Don't create DImode
	subregs of TFmode.

From-SVN: r183945
This commit is contained in:
Alan Modra 2012-02-07 08:39:13 +10:30 committed by Alan Modra
parent c5f14d626e
commit 30f0eb2d91
2 changed files with 14 additions and 11 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2012-02-07 Alan Modra <amodra@gmail.com>
PR target/52107
* config/rs6000/rs6000.c (rs6000_emit_move): Don't create DImode
subregs of TFmode.
2012-02-06 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/50969

19
gcc/config/rs6000/rs6000.c
View File

@ -7010,17 +7010,14 @@ rs6000_emit_move (rtx dest, rtx source, enum machine_mode mode)
if (!TARGET_IEEEQUAD && TARGET_LONG_DOUBLE_128
&& mode == TFmode && GET_CODE (operands[1]) == CONST_DOUBLE)
{
/* DImode is used, not DFmode, because simplify_gen_subreg doesn't
know how to get a DFmode SUBREG of a TFmode. */
enum machine_mode imode = (TARGET_E500_DOUBLE ? DFmode : DImode);
rs6000_emit_move (simplify_gen_subreg (imode, operands[0], mode, 0),
simplify_gen_subreg (imode, operands[1], mode, 0),
imode);
rs6000_emit_move (simplify_gen_subreg (imode, operands[0], mode,
GET_MODE_SIZE (imode)),
simplify_gen_subreg (imode, operands[1], mode,
GET_MODE_SIZE (imode)),
imode);
rs6000_emit_move (simplify_gen_subreg (DFmode, operands[0], mode, 0),
simplify_gen_subreg (DFmode, operands[1], mode, 0),
DFmode);
rs6000_emit_move (simplify_gen_subreg (DFmode, operands[0], mode,
GET_MODE_SIZE (DFmode)),
simplify_gen_subreg (DFmode, operands[1], mode,
GET_MODE_SIZE (DFmode)),
DFmode);
return;
}