From bd1f3566b12eb1e86d17b0c8c84c91ea5e9844b3 Mon Sep 17 00:00:00 2001 From: Martin Sebor Date: Sat, 4 Aug 2018 22:14:41 +0000 Subject: [PATCH] PR tree-optimization/86571 - AIX NaNQ and NaNS output format conflicts with __builtin_sprintf gcc/ChangeLog: PR tree-optimization/86571 * gimple-ssa-sprintf.c (format_floating): Extend upper bound of NaN output to 4. From-SVN: r263312 --- gcc/gimple-ssa-sprintf.c | 11 +++++++++-- 2 files changed, 15 insertions(+), 2 deletions(-) diff --git a/gcc/gimple-ssa-sprintf.c b/gcc/gimple-ssa-sprintf.c index bda738de937..c652c556f97 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 -- 2.25.0