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Re: [PATCH]: Update patches for memset and memcmp builtins
- From: Roger Sayle <roger at eyesopen dot com>
- To: Richard Henderson <rth at redhat dot com>
- Cc: <gcc-patches at gcc dot gnu dot org>
- Date: Wed, 12 Dec 2001 17:41:15 -0700 (MST)
- Subject: Re: [PATCH]: Update patches for memset and memcmp builtins
On Wed, 12 Dec 2001, Richard Henderson wrote:
> On Mon, Dec 10, 2001 at 05:30:25PM -0700, Roger Sayle wrote:
> > * builtins.c (expand_builtin_memset, expand_builtin_memcpy,
> > expand_builtin_strcpy): Additional arguments TARGET and MODE.
> > (expand_builtin_bzero, expand_builtin_strcpy,
> > expand_builtin_strncpy, expand_builtin_bzero): Pass additional
> > TARGET and MODE parameters to the above functions.
> > (expand_builtin_memset, expand_builtin_memcpy): Optimize the
> > case where the LEN parameter is constant zero.
> > (expand_builtin_memcmp): No longer conditional on
> > HAVE_cmpstrsi. Take an additional mode parameter. Optimize
> > the cases where len is either constant zero or one.
> > Optimize to call to memcpy, even if the memcpy isn't inlined.
> > (expand_builtin_strncpy): Optimize to call memcpy, even if the
> > memcpy isn't inlined.
> > (expand_builtin_strcmp, expand_builtin_strncmp): Always attempt
> > to optimize to a call to memcmp.
> > (expand_builtin): expand_builtin_memcmp can always be called,
> > and pass the required parameters to expand_builtin_memcmp,
> > expand_builtin_memset, expand_builtin_memcpy and
> > expand_builtin_strcpy.
> > * gcc.c-torture/execute/string-opt-14.c: New test case.
> > * gcc.c-torture/execute/string-opt-15.c: New test case.
Many thanks yet again,