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[Bug tree-optimization/50693] Loop optimization restricted by GOTOs
- From: "irar at il dot ibm.com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 11 Oct 2011 07:15:15 +0000
- Subject: [Bug tree-optimization/50693] Loop optimization restricted by GOTOs
- Auto-submitted: auto-generated
- References: <bug-50693-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50693
Ira Rosen <irar at il dot ibm.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |irar at il dot ibm.com
--- Comment #11 from Ira Rosen <irar at il dot ibm.com> 2011-10-11 07:15:15 UTC ---
The vectorizer doesn't handle control flow in loop, and for the second loop we
have:
<bb 3>:
goto <bb 7> (copy_block);
loop_back:
if (n_3(D) > i_10)
goto <bb 6>;
else
goto <bb 5>;
<bb 5>:
pretmp.20_6 = v_20->chars;
goto <bb 8> (end);
<bb 6>:
pretmp.20_2 = v_20->chars;
# i_29 = PHI <i_10(6), 0(3)>
# prephitmp.21_1 = PHI <pretmp.20_2(6), D.4528_22(3)>
copy_block:
D.4443_8 = prephitmp.21_1 + i_29;
*D.4443_8 = c_9(D);
i_10 = i_29 + 1;
goto <bb 4> (loop_back);