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| author | Richard Biener <rguenther@suse.de> | 2023-03-15 09:47:18 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2023-03-15 10:29:27 +0100 |
| commit | 0fc541efc340535d212cd685176bd9592905de8a (patch) | |
| tree | 619b7831dc0b4a08f9e65167b956210964c44786 | |
| parent | 45641f3a99281bb0a429649741a29c2aace4c63e (diff) | |
| download | gcc-0fc541efc340535d212cd685176bd9592905de8a.zip gcc-0fc541efc340535d212cd685176bd9592905de8a.tar.gz gcc-0fc541efc340535d212cd685176bd9592905de8a.tar.bz2 | |
tree-optimization/109139 - fix .DEFERRED_INIT removal
The following make sure to strip MEMs when looking for unused
decls on the LHS of .DEFERRED_INIT.
PR tree-optimization/109139
* tree-ssa-live.cc (remove_unused_locals): Look at the
base address for unused decls on the LHS of .DEFERRED_INIT.
* gcc.dg/torture/pr109139.c: New testcase.
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/pr109139.c | 12 | ||||
| -rw-r--r-- | gcc/tree-ssa-live.cc | 3 |
2 files changed, 14 insertions, 1 deletions
diff --git a/gcc/testsuite/gcc.dg/torture/pr109139.c b/gcc/testsuite/gcc.dg/torture/pr109139.c new file mode 100644 index 0000000..9fa97eb --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr109139.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-additional-options "-ftrivial-auto-var-init=zero" } */ + +const int COMPARE_CANDIDATE; +char ipmi_ek_compare_link_record1_0, ipmi_ek_compare_link_record2_0; +void ipmi_ek_compare_link() +{ + for (; ipmi_ek_compare_link_record1_0;) + for (; ipmi_ek_compare_link_record2_0;) { + int link[COMPARE_CANDIDATE]; + } +} diff --git a/gcc/tree-ssa-live.cc b/gcc/tree-ssa-live.cc index 9118e82..1be9295 100644 --- a/gcc/tree-ssa-live.cc +++ b/gcc/tree-ssa-live.cc @@ -897,7 +897,8 @@ remove_unused_locals (void) else if (gimple_call_internal_p (stmt, IFN_DEFERRED_INIT)) { tree lhs = gimple_call_lhs (stmt); - if (DECL_P (lhs) && !is_used_p (lhs)) + tree base = get_base_address (lhs); + if (DECL_P (base) && !is_used_p (base)) { unlink_stmt_vdef (stmt); gsi_remove (&gsi, true); |