Re: [PATCH] fix vectorizer performance problem on cygwin hosted cross compiler

2015-11-20 Thread Richard Biener
On Fri, Nov 20, 2015 at 8:21 AM, Jim Wilson wrote: > A cygwin hosted cross compiler to aarch64-linux, compiling a C version > of linpack with -Ofast, produces code that runs 17% slower than a > linux hosted compiler. The problem shows up in the vect dump, where > some

[PATCH] fix vectorizer performance problem on cygwin hosted cross compiler

2015-11-19 Thread Jim Wilson
A cygwin hosted cross compiler to aarch64-linux, compiling a C version of linpack with -Ofast, produces code that runs 17% slower than a linux hosted compiler. The problem shows up in the vect dump, where some different vectorization optimization decisions were made by the cygwin compiler than