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* flow.c (elim_reg_cond): Handle a comparison of a subreg.

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From-SVN: r124122
This commit is contained in:
Ian Lance Taylor 2007-04-24 21:02:21 +00:00
parent 438d798f12
commit 1965dd3a1f
2 changed files with 14 additions and 3 deletions
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9
gcc/ChangeLog
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@ -1,10 +1,15 @@
2007-04-24 Ian Lance Taylor <iant@google.com>
* flow.c (elim_reg_cond): Handle a comparison of a subreg.
2007-04-24 Simon Martin <simartin@users.sourceforge.net>
PR diagnostic/25923
* tree-pass.h (TDF_DIAGNOSTIC): New dump control to specify that a
diagnostic message is being built.
* tree-pretty-print.c (dump_generic_node): Only write the formatted text
into BUFFER's stream if we are not building a diagnostic message.
* tree-pretty-print.c (dump_generic_node): Only write the
formatted text into BUFFER's stream if we are not building a
diagnostic message.
* toplev.c (default_tree_printer): Pass TDF_DIAGNOSTIC to
dump_generic_node.
* Makefile.in (toplev.o): Depend on tree-pass.h.

8
gcc/flow.c
View File

@ -3437,7 +3437,13 @@ elim_reg_cond (rtx x, unsigned int regno)
if (COMPARISON_P (x))
{
if (REGNO (XEXP (x, 0)) == regno)
rtx reg;
reg = XEXP (x, 0);
if (GET_CODE (reg) == SUBREG)
reg = SUBREG_REG (reg);
gcc_assert (REG_P (reg));
if (REGNO (reg) == regno)
return const0_rtx;
return x;
}