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middle-end/1557: Regrename macro not documented
- To: gcc-gnats at gcc dot gnu dot org
- Subject: middle-end/1557: Regrename macro not documented
- From: Richard Earnshaw <rearnsha at arm dot com>
- Date: Fri, 5 Jan 2001 11:24:07 GMT
>Number: 1557
>Category: middle-end
>Synopsis: Regrename macro not documented
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: unassigned
>State: open
>Class: doc-bug
>Submitter-Id: net
>Arrival-Date: Fri Jan 05 03:26:02 PST 2001
>Closed-Date:
>Last-Modified:
>Originator: Richard Earnshaw
>Release: 2.97 20010103 (experimental)
>Organization:
ARM
>Environment:
System: SunOS sun18 5.7 Generic_106541-11 sun4u sparc SUNW,Ultra-5_10
Architecture: sun4
host: sparc-sun-solaris2.5.1
build: sparc-sun-solaris2.5.1
target: arm-unknown-elf
configured with: /home/rearnsha/gnusrc/egcs-cross/configure --target=arm-elf --with-headers=/home/rearnsha/gnusrc/utils/newlib/libc/include --prefix=/home/rearnsha/gnu/egcs/install/SunOS5 : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) /home/rearnsha/gnusrc/egcs-cross/configure --with-gcc-version-trigger=/home/rearnsha/gnusrc/egcs-cross/gcc/version.c --host=sparc-sun-solaris2.5.1 --target=arm-elf --with-headers=/home/rearnsha/gnusrc/utils/newlib/libc/include --prefix=/home/rearnsha/gnu/egcs/install/SunOS5 : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured) : (reconfigured)
>Description:
The macro
HARD_REGNO_RENAME_OK(FROM,TO)
which is used by the regrename pass is undocumented.
>How-To-Repeat:
Read the documentation
>Fix:
Document them. The IA64 port has the following comments:
/* A C expression that is nonzero if hard register number REGNO2 can be
considered for use as a rename register for REGNO1 */
#define HARD_REGNO_RENAME_OK(REGNO1,REGNO2) ...
/* Define this macro if the compiler should use extended basic blocks
when renaming registers. Define this macro if the target has
predicate registers. */
#define RENAME_EXTENDED_BLOCKS
However, the latter seems to be unused.
>Release-Note:
>Audit-Trail:
>Unformatted: