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| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-02-10 16:22:29 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-02-10 16:22:29 +0000 |
| commit | e15deb4b329bf724d50139ade9b5a0e9b152b130 (patch) | |
| tree | eb1fb857e229b58695341024ec649f95610b921f /gcc/tree-ssa-sink.c | |
| parent | a9c1f295d9e02e5d7ccb174df7223b9deeefbb99 (diff) | |
| download | gcc-e15deb4b329bf724d50139ade9b5a0e9b152b130.tar.gz | |
PR target/39139
* function.h (struct function): Add has_local_explicit_reg_vars
bit.
* gimplify.c (gimplify_bind_expr): Set it if local DECL_HARD_REGISTER
VAR_DECLs were seen.
* tree-ssa-live.c (remove_unused_locals): Recompute
cfun->has_local_explicit_reg_vars.
* tree-ssa-sink.c (statement_sink_location): Don't sink BLKmode
copies or clearings if cfun->has_local_explicit_reg_vars.
* gcc.target/i386/pr39139.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@144065 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-sink.c')
| -rw-r--r-- | gcc/tree-ssa-sink.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/gcc/tree-ssa-sink.c b/gcc/tree-ssa-sink.c index e56cce0edb1..82a027da049 100644 --- a/gcc/tree-ssa-sink.c +++ b/gcc/tree-ssa-sink.c @@ -1,5 +1,6 @@ /* Code sinking for trees - Copyright (C) 2001, 2002, 2003, 2004, 2007 Free Software Foundation, Inc. + Copyright (C) 2001, 2002, 2003, 2004, 2007, 2009 + Free Software Foundation, Inc. Contributed by Daniel Berlin <dan@dberlin.org> This file is part of GCC. @@ -301,7 +302,12 @@ statement_sink_location (gimple stmt, basic_block frombb, We can't sink statements that have volatile operands. We don't want to sink dead code, so anything with 0 immediate uses is not - sunk. + sunk. + + Don't sink BLKmode assignments if current function has any local explicit + register variables, as BLKmode assignments may involve memcpy or memset + calls or, on some targets, inline expansion thereof that sometimes need + to use specific hard registers. */ code = gimple_assign_rhs_code (stmt); @@ -311,7 +317,9 @@ statement_sink_location (gimple stmt, basic_block frombb, || code == FILTER_EXPR || is_hidden_global_store (stmt) || gimple_has_volatile_ops (stmt) - || !ZERO_SSA_OPERANDS (stmt, SSA_OP_VUSE)) + || !ZERO_SSA_OPERANDS (stmt, SSA_OP_VUSE) + || (cfun->has_local_explicit_reg_vars + && TYPE_MODE (TREE_TYPE (gimple_assign_lhs (stmt))) == BLKmode)) return false; FOR_EACH_SSA_DEF_OPERAND (def_p, stmt, iter, SSA_OP_ALL_DEFS) |