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Remove experimental hunk that wasn't supposed to be checked in.

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From-SVN: r30298
This commit is contained in:
Jeff Law 1999-10-31 17:55:24 -07:00
parent 5949bdae94
commit 8f65050e41
1 changed files with 0 additions and 21 deletions
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21
gcc/cse.c
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@ -5517,32 +5517,11 @@ cse_insn (insn, libcall_insn)
&& GET_CODE (XEXP (XEXP (src_const, 0), 0)) == LABEL_REF
&& GET_CODE (XEXP (XEXP (src_const, 0), 1)) == LABEL_REF))
{
rtx simplified_src_const;
tem = find_reg_note (insn, REG_EQUAL, NULL_RTX);
/* Make sure that the rtx is not shared with any other insn. */
src_const = copy_rtx (src_const);
/* Try to simplify SRC_CONST.
The primary purpose behind simplifying the note is to allow
for easier removal of library call sequences later. Consider
a udiv libcall where we can determine the second argument is
a constant. SRC_CONST would look like:
(udiv (reg) (const_int 2**n))
That RTL expression will simplify into:
(lshiftrt (reg) (const_int n))
A target using library calls for division is more likely to
have a lshiftrt insn. Thus, it is more likely that the libcall
can be deleted in delete_trivially_dead_insns if we simplify
the note. */
simplified_src_const = simplify_rtx (src_const);
src_const = simplified_src_const ? simplified_src_const : src_const;
/* Record the actual constant value in a REG_EQUAL note, making
a new one if one does not already exist. */
if (tem)