diff options
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/gimple-ssa-sprintf.c | 11 |
2 files changed, 15 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5894b6d..7d23239 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2018-08-04 Martin Sebor <msebor@redhat.com> + + PR tree-optimization/86571 + * gimple-ssa-sprintf.c (format_floating): Extend upper bound of + NaN output to 4. + 2018-08-03 Sandra Loosemore <sandra@codesourcery.com> * config/nios2/nios2.c (TARGET_HAVE_SPECULATION_SAFE_VALUE): diff --git a/gcc/gimple-ssa-sprintf.c b/gcc/gimple-ssa-sprintf.c index bda738d..c652c55 100644 --- a/gcc/gimple-ssa-sprintf.c +++ b/gcc/gimple-ssa-sprintf.c @@ -2014,8 +2014,15 @@ format_floating (const directive &dir, tree arg, vr_values *) res.range.likely = res.range.min; res.range.max = res.range.min; - /* The inlikely maximum is "[-/+]infinity" or "[-/+]nan". */ - res.range.unlikely = sign + (real_isinf (rvp) ? 8 : 3); + /* The unlikely maximum is "[-/+]infinity" or "[-/+][qs]nan". + For NaN, the C/POSIX standards specify two formats: + "[-/+]nan" + and + "[-/+]nan(n-char-sequence)" + No known printf implementation outputs the latter format but AIX + outputs QNaN and SNaN for quiet and signalling NaN, respectively, + so the unlikely maximum reflects that. */ + res.range.unlikely = sign + (real_isinf (rvp) ? 8 : 4); /* The range for infinity and NaN is known unless either width or precision is unknown. Width has the same effect regardless |