From 883eec6653b4dd89f7ed0cdad2b0b1010e045e12 Mon Sep 17 00:00:00 2001 From: Richard Biener Date: Wed, 29 Jul 2020 12:30:59 +0200 Subject: [PATCH] more SCEV cache clearing This fixes two more places, in loop interchange and in the vectorizer where the SCEV verifier sees stale entries. 2020-07-29 Richard Biener * tree-vectorizer.c (vectorize_loops): Reset the SCEV cache if we removed any SIMD UID SSA defs. * gimple-loop-interchange.cc (pass_linterchange::execute): Reset the scev cache if we interchanged a loop. --- gcc/gimple-loop-interchange.cc | 2 ++ gcc/tree-vectorizer.c | 6 +++++- 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/gcc/gimple-loop-interchange.cc b/gcc/gimple-loop-interchange.cc index 2379848..1656004 100644 --- a/gcc/gimple-loop-interchange.cc +++ b/gcc/gimple-loop-interchange.cc @@ -2084,6 +2084,8 @@ pass_linterchange::execute (function *fun) loop_nest.release (); } + if (changed_p) + scev_reset (); return changed_p ? (TODO_update_ssa_only_virtuals) : 0; } diff --git a/gcc/tree-vectorizer.c b/gcc/tree-vectorizer.c index 26a1846..2a60d37 100644 --- a/gcc/tree-vectorizer.c +++ b/gcc/tree-vectorizer.c @@ -1283,7 +1283,11 @@ vectorize_loops (void) /* Fold IFN_GOMP_SIMD_{VF,LANE,LAST_LANE,ORDERED_{START,END}} builtins. */ if (cfun->has_simduid_loops) - adjust_simduid_builtins (simduid_to_vf_htab); + { + adjust_simduid_builtins (simduid_to_vf_htab); + /* Avoid stale SCEV cache entries for the SIMD_LANE defs. */ + scev_reset (); + } /* Shrink any "omp array simd" temporary arrays to the actual vectorization factors. */ -- 2.7.4