mirror of
https://github.com/gcc-mirror/gcc.git
synced 2026-05-06 23:14:49 +02:00
677249a232
In improve_allocation() routine, IRA checks for each allocno if spilling any conflicting allocnos can improve the allocation of this allocno. This routine computes the cost improvement for usage of each profitable hard register for a given allocno. The existing code in improve_allocation() does not consider the save/restore costs of callee save registers while computing the cost improvement. This can result in a callee save register being assigned to a pseudo that is live in the entire function and across a call, overriding a non-callee save register assigned to the pseudo by graph coloring. So the entry basic block requires a prolog, thereby causing shrink wrap to fail. 2023-09-14 Surya Kumari Jangala <jskumari@linux.ibm.com> gcc/ PR rtl-optimization/110071 * ira-color.cc (improve_allocation): Consider cost of callee save registers. gcc/testsuite/ PR rtl-optimization/110071 * gcc.target/powerpc/pr110071.c: New test.
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.