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cse.c (cse_insn): Restoring old behaviour for src_eqv when dest and value in the REG_EQUAL are... 

gcc/ChangeLog:

2015-08-05  Kugan Vivekanandarajah  <kuganv@linaro.org>

	* cse.c (cse_insn): Restoring old behaviour for src_eqv
	 when dest and value in the REG_EQUAL are same and dest
	 is STRICT_LOW_PART.

From-SVN: r226606
This commit is contained in:
Kugan Vivekanandarajah 2015-08-05 01:08:49 +00:00 committed by Kugan Vivekanandarajah
parent 4856562a70
commit 1e928e07b2
2 changed files with 11 additions and 4 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2015-08-05 Kugan Vivekanandarajah <kuganv@linaro.org>
* cse.c (cse_insn): Restoring old behaviour for src_eqv
when dest and value in the REG_EQUAL are same and dest
is STRICT_LOW_PART.
2015-08-04 Anatoly Sokolov <aesok@post.ru>
* config/moxie/moxie.h (PRINT_OPERAND,

9
gcc/cse.c
View File

@ -4528,12 +4528,13 @@ cse_insn (rtx_insn *insn)
this case, and if it isn't set, then there will be no equivalence
for the destination. */
if (n_sets == 1 && REG_NOTES (insn) != 0
&& (tem = find_reg_note (insn, REG_EQUAL, NULL_RTX)) != 0
&& (! rtx_equal_p (XEXP (tem, 0), SET_SRC (sets[0].rtl))))
&& (tem = find_reg_note (insn, REG_EQUAL, NULL_RTX)) != 0)
{
if (GET_CODE (SET_DEST (sets[0].rtl)) == STRICT_LOW_PART)
src_eqv = copy_rtx (XEXP (tem, 0));
if (GET_CODE (SET_DEST (sets[0].rtl)) != ZERO_EXTRACT
&& (! rtx_equal_p (XEXP (tem, 0), SET_SRC (sets[0].rtl))
|| GET_CODE (SET_DEST (sets[0].rtl)) == STRICT_LOW_PART))
src_eqv = copy_rtx (XEXP (tem, 0));
/* If DEST is of the form ZERO_EXTACT, as in:
(set (zero_extract:SI (reg:SI 119)
(const_int 16 [0x10])