From 88ee126ee0401e293888e7d1b9219ad35eb130b5 Mon Sep 17 00:00:00 2001 From: Andrew Carlotti Date: Fri, 12 Aug 2022 14:36:22 +0100 Subject: [PATCH] Improve comment for tree_niter_desc.{control,bound,cmp} Fix typos and explain ERROR_MARK usage. gcc/ChangeLog: * tree-ssa-loop.h: Improve comment --- gcc/tree-ssa-loop.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/gcc/tree-ssa-loop.h b/gcc/tree-ssa-loop.h index 415f461c37e4..6c70f795d171 100644 --- a/gcc/tree-ssa-loop.h +++ b/gcc/tree-ssa-loop.h @@ -54,11 +54,11 @@ public: widest_int max; /* The upper bound on the number of iterations of the loop. */ - /* The simplified shape of the exit condition. The loop exits if - CONTROL CMP BOUND is false, where CMP is one of NE_EXPR, - LT_EXPR, or GT_EXPR, and step of CONTROL is positive if CMP is - LE_EXPR and negative if CMP is GE_EXPR. This information is used - by loop unrolling. */ + /* The simplified shape of the exit condition. This information is used by + loop unrolling. If CMP is ERROR_MARK, then the loop cannot be unrolled. + Otherwise, the loop exits if CONTROL CMP BOUND is false, where CMP is one + of NE_EXPR, LT_EXPR, or GT_EXPR, and CONTROL.STEP is positive if CMP is + LT_EXPR and negative if CMP is GT_EXPR. */ affine_iv control; tree bound; enum tree_code cmp; -- 2.47.2