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target/7211: Alpha prefetch hints interpreted wrong
- From: Falk Hueffner <falk dot hueffner at student dot uni-tuebingen dot de>
- To: gcc-gnats at gcc dot gnu dot org
- Date: Fri, 05 Jul 2002 06:02:28 +0200
- Subject: target/7211: Alpha prefetch hints interpreted wrong
>Number: 7211
>Category: target
>Synopsis: Alpha prefetch hints interpreted wrong
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Thu Jul 04 21:06:02 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Falk Hueffner
>Release: 3.2 20020625 (experimental)
>Organization:
>Environment:
System: Linux borkum 2.4.18 #6 Wed Apr 24 22:18:43 CEST 2002 alpha unknown
Architecture: alpha
host: alphapca56-unknown-linux-gnu
build: alphapca56-unknown-linux-gnu
target: alphapca56-unknown-linux-gnu
configured with: ../configure --enable-languages=c
>Description:
__builtin_prefetch(p, 0, 0) means "read, evict soon", so (according to
http://gcc.gnu.org/projects/prefetch.html#alpha) it ought to emit ldq,
but it emits lds. __builtin_prefetch(p, 1, 1) (rw, keep) should be
lds, but ldq is emitted.
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: