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[Bug c/42682] floating point optimizations needlessly shuffle xmm registers
- From: "matti dot aarnio--gcc-bugs at zmailer dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 Jan 2010 15:40:00 -0000
- Subject: [Bug c/42682] floating point optimizations needlessly shuffle xmm registers
- References: <bug-42682-18652@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #1 from matti dot aarnio--gcc-bugs at zmailer dot org 2010-01-10 15:40 -------
Created an attachment (id=19530)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19530&action=view)
example code showing minss related unnecessary temp registers
Compile command: (on x86_64 machine with SSE2 instructions)
gcc -g -O9 -c -Xassembler -ahl minsamplefloat.c > minsamplefloat.lst
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42682