From cfb9edba16820a3360456a502931c80da6b734a5 Mon Sep 17 00:00:00 2001 From: Eric Botcazou Date: Wed, 13 Nov 2013 12:15:47 +0000 Subject: cfgexpand.c (expand_used_vars): Allocate space for partitions based on PARM_DECLs or RESULT_DECLs only if... * cfgexpand.c (expand_used_vars): Allocate space for partitions based on PARM_DECLs or RESULT_DECLs only if they are ignored for debug info or if optimization is enabled. * tree-ssa-coalesce.c (coalesce_ssa_name): If optimization is disabled, require that all the names based on a PARM_DECL or a RESULT_DECL that isn't ignored for debug info be coalesced. From-SVN: r204742 --- gcc/cfgexpand.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'gcc/cfgexpand.c') diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c index 4e622c0..de7a7b3 100644 --- a/gcc/cfgexpand.c +++ b/gcc/cfgexpand.c @@ -1610,9 +1610,15 @@ expand_used_vars (void) replace_ssa_name_symbol (var, (tree) *slot); } + /* Always allocate space for partitions based on VAR_DECLs. But for + those based on PARM_DECLs or RESULT_DECLs and which matter for the + debug info, there is no need to do so if optimization is disabled + because all the SSA_NAMEs based on these DECLs have been coalesced + into a single partition, which is thus assigned the canonical RTL + location of the DECLs. */ if (TREE_CODE (SSA_NAME_VAR (var)) == VAR_DECL) expand_one_var (var, true, true); - else + else if (DECL_IGNORED_P (SSA_NAME_VAR (var)) || optimize) { /* This is a PARM_DECL or RESULT_DECL. For those partitions that contain the default def (representing the parm or result itself) -- cgit v1.1