From a99706355ce51a464a2e74f81009b16a22f48691 Mon Sep 17 00:00:00 2001 From: Iain Buclaw Date: Wed, 22 Jun 2022 19:11:20 +0200 Subject: [PATCH] tilegx: Fix infinite loop in gen-mul-tables generator Since around GCC 10, the condition `j < (INTMAX_MAX / 10)' will get optimized into `j != 922337203685477580', which will result in an infinite loop for certain inputs of `j'. Copy the condition already used by the -DTILEPRO generator code, which doesn't fall into this trap. gcc/ChangeLog: * config/tilepro/gen-mul-tables.cc (tilegx_emit): Adjust loop condition to avoid overflow. (cherry picked from commit c0ad48527c314a1e9354b7c26718b56ed4abc92c) --- gcc/config/tilepro/gen-mul-tables.cc | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/gcc/config/tilepro/gen-mul-tables.cc b/gcc/config/tilepro/gen-mul-tables.cc index 2a345023aeac..b57e6b125ece 100644 --- a/gcc/config/tilepro/gen-mul-tables.cc +++ b/gcc/config/tilepro/gen-mul-tables.cc @@ -1190,11 +1190,11 @@ tilegx_emit (long long multiplier, int num_ops) long long next_pow10; while (((j * 10) < abs_multiplier) - && (j < (INTMAX_MAX / 10))) + && (j < (j * 10))) j = j * 10; prev_pow10 = j; - next_pow10 = (j > (INTMAX_MAX / 10)) ? 0 : j * 10; + next_pow10 = j * 10; if ((abs_multiplier - prev_pow10 <= 100) || (next_pow10 -- 2.47.2