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| author | Richard Biener <rguenther@suse.de> | 2021-09-10 10:17:24 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2021-09-10 11:10:59 +0200 |
| commit | 1dae802b685937b1dc52e49d0641c75f3186ba14 (patch) | |
| tree | 548d8ac844c5b33a3b2ace492d874451fa48604f /gcc | |
| parent | f7523dbc2d2934afd467008e22c695d362b3d365 (diff) | |
| download | gcc-1dae802b685937b1dc52e49d0641c75f3186ba14.zip gcc-1dae802b685937b1dc52e49d0641c75f3186ba14.tar.gz gcc-1dae802b685937b1dc52e49d0641c75f3186ba14.tar.bz2 | |
middle-end/102269 - avoid auto-init of empty types
This avoids initializing empty types for which we'll eventually
leave a .DEFERRED_INIT call without a LHS.
2021-09-10 Richard Biener <rguenther@suse.de>
PR middle-end/102269
* gimplify.c (is_var_need_auto_init): Empty types do not need
initialization.
* gcc.dg/pr102269.c: New testcase.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/gimplify.c | 3 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr102269.c | 4 |
2 files changed, 6 insertions, 1 deletions
diff --git a/gcc/gimplify.c b/gcc/gimplify.c index 3314f76..8820f87 100644 --- a/gcc/gimplify.c +++ b/gcc/gimplify.c @@ -1826,7 +1826,8 @@ is_var_need_auto_init (tree decl) { if (auto_var_p (decl) && (flag_auto_var_init > AUTO_INIT_UNINITIALIZED) - && (!lookup_attribute ("uninitialized", DECL_ATTRIBUTES (decl)))) + && (!lookup_attribute ("uninitialized", DECL_ATTRIBUTES (decl))) + && !is_empty_type (TREE_TYPE (decl))) return true; return false; } diff --git a/gcc/testsuite/gcc.dg/pr102269.c b/gcc/testsuite/gcc.dg/pr102269.c new file mode 100644 index 0000000..9d41b8f --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr102269.c @@ -0,0 +1,4 @@ +/* { dg-do compile } */ +/* { dg-options "-ftrivial-auto-var-init=zero" } */ + +void fn() { int a[0]; } |