676e38c2a9
Optimizing gcc.dg/torture/pr41094.c, the compiler computes the constant value and short-circuits the whole thing. At -O0, however, on 32-bit x86, the call to pow() remains, and the program compares the returned value in a stack register, with excess precision, with the exact return value expected from pow(). If libm's pow() returns a slightly off result, the compare fails. If the value in the register is stored in a separate variable, so it gets rounded to double precision, and then compared, the compare passes. It's not clear that the test was meant to detect libm's reliance on rounding off the excess precision, but I guess it wasn't, so I propose this slight change that enables it to pass regardless of the slight inaccuracy of the C library in use. for gcc/testsuite/ChangeLog * gcc.dg/torture/pr41094.c: Introduce intermediate variable. From-SVN: r276404 |
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README
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.