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[Bug target/59371] [4.8/4.9/5 Regression] Performance regression in GCC 4.8 and later versions.
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 14 Jan 2015 07:12:52 +0000
- Subject: [Bug target/59371] [4.8/4.9/5 Regression] Performance regression in GCC 4.8 and later versions.
- Auto-submitted: auto-generated
- References: <bug-59371-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59371
--- Comment #13 from UroÅ Bizjak <ubizjak at gmail dot com> ---
Difference (-O2 vs -O3) of neatly formatted results in a 16x16 array:
--- res-O2.txt 2015-01-14 08:08:39.000000000 +0100
+++ res-O3.txt 2015-01-14 08:09:57.000000000 +0100
@@ -1,7 +1,7 @@
-000, 001, 002, 003, 016, 017, 018, 019, 032, 033, 034, 035, 048, 049, 050,
051,
-064, 065, 066, 067, 080, 081, 082, 083, 096, 097, 098, 099, 112, 113, 114,
115,
-128, 129, 130, 131, 144, 145, 146, 147, 160, 161, 162, 163, 176, 177, 178,
179,
-192, 193, 194, 195, 208, 209, 210, 211, 224, 225, 226, 227, 240, 241, 242,
243,
+000, 001, 002, 003, 004, 005, 006, 007, 008, 009, 010, 011, 012, 013, 014,
015,
+016, 017, 018, 019, 020, 021, 022, 023, 024, 025, 026, 027, 028, 029, 030,
031,
+032, 033, 034, 035, 036, 037, 038, 039, 040, 041, 042, 043, 044, 045, 046,
047,
+048, 049, 050, 051, 052, 053, 054, 055, 056, 057, 058, 059, 060, 061, 062,
063,
004, 005, 006, 007, 020, 021, 022, 023, 036, 037, 038, 039, 052, 053, 054,
055,
068, 069, 070, 071, 084, 085, 086, 087, 100, 101, 102, 103, 116, 117, 118,
119,
132, 133, 134, 135, 148, 149, 150, 151, 164, 165, 166, 167, 180, 181, 182,
183,
The problem is only with the first 64 elements.