From 3d0ea94308ba4f3e677ffd7a19a4786e48661c6e Mon Sep 17 00:00:00 2001 From: glisse Date: Tue, 29 Oct 2013 13:19:08 +0000 Subject: [PATCH] 2013-10-29 Marc Glisse PR tree-optimization/19831 gcc/ * tree-ssa-alias.c (stmt_kills_ref_p_1): Handle BUILT_IN_FREE. gcc/testsuite/ * gcc.dg/tree-ssa/alias-25.c: New file. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204160 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/ChangeLog | 5 +++++ gcc/testsuite/ChangeLog | 5 +++++ gcc/testsuite/gcc.dg/tree-ssa/alias-25.c | 12 ++++++++++++ gcc/tree-ssa-alias.c | 10 ++++++++++ 4 files changed, 32 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/alias-25.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a683e9a2546..3bb38ebf4fb 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2013-10-29 Marc Glisse + + PR tree-optimization/19831 + * tree-ssa-alias.c (stmt_kills_ref_p_1): Handle BUILT_IN_FREE. + 2013-10-29 Andrew MacLeod * tree-outof-ssa.h: Remove include files. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 8f1e5ebac83..69937edf632 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2013-10-29 Marc Glisse + + PR tree-optimization/19831 + * gcc.dg/tree-ssa/alias-25.c: New file. + 2013-10-29 Richard Biener * g++.dg/vect/slp-pr56812.cc: Adjust with respect to -fvect-cost-model diff --git a/gcc/testsuite/gcc.dg/tree-ssa/alias-25.c b/gcc/testsuite/gcc.dg/tree-ssa/alias-25.c new file mode 100644 index 00000000000..f5705d03cd9 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/alias-25.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fdump-tree-optimized" } */ + +void f (long *p) { + *p = 42; + p[4] = 42; + __builtin_free (p); +} + +/* { dg-final { scan-tree-dump-not "= 42" "optimized" } } */ +/* { dg-final { cleanup-tree-dump "optimized" } } */ + diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c index a3046ad4f81..4db83bd1f98 100644 --- a/gcc/tree-ssa-alias.c +++ b/gcc/tree-ssa-alias.c @@ -2057,6 +2057,16 @@ stmt_kills_ref_p_1 (gimple stmt, ao_ref *ref) && DECL_BUILT_IN_CLASS (callee) == BUILT_IN_NORMAL) switch (DECL_FUNCTION_CODE (callee)) { + case BUILT_IN_FREE: + { + tree ptr = gimple_call_arg (stmt, 0); + tree base = ao_ref_base (ref); + if (base && TREE_CODE (base) == MEM_REF + && TREE_OPERAND (base, 0) == ptr) + return true; + break; + } + case BUILT_IN_MEMCPY: case BUILT_IN_MEMPCPY: case BUILT_IN_MEMMOVE: -- 2.11.4.GIT