Author: Remi Meier <remi.me...@gmail.com>
Branch:
Changeset: r1972:ce67a5ccd206
Date: 2015-11-25 16:58 +0100
http://bitbucket.org/pypy/stmgc/changeset/ce67a5ccd206/
Log: gcc bug needs -fno-tree-vectorize to translate pypy
diff --git a/gcc-seg-gs/README.txt b/gcc-seg-gs/README.txt
--- a/gcc-seg-gs/README.txt
+++ b/gcc-seg-gs/README.txt
@@ -31,8 +31,11 @@
#!/bin/bash
BUILD=/..../build # <- insert full path
- exec $BUILD/gcc/xgcc -B $BUILD/gcc -fno-ivopts "$@"
+ exec $BUILD/gcc/xgcc -B $BUILD/gcc -fno-ivopts -fno-tree-vectorize "$@"
So far, GCC has a bug in the presence of multiple address spaces, likely
in the "ivopts" optimization. It can be worked around by specifying
"-fno-ivopts" like above. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66768
+
+Another bug in -ftree-vectorize seems to generate unprefixed vector
+instructions.
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