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| author | Jakub Jelinek <jakub@redhat.com> | 2010-09-15 17:42:41 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2010-09-15 17:42:41 +0200 |
| commit | cc99c5fefc057335b9ed6928d997c49bf3ff6575 (patch) | |
| tree | 02e725f48b3beb800af69240bed12624b9ce5177 /gcc/expr.c | |
| parent | 21b6aca3e1df3b774a2895c0d43d9397a2ff4ba0 (diff) | |
| download | gcc-cc99c5fefc057335b9ed6928d997c49bf3ff6575.zip gcc-cc99c5fefc057335b9ed6928d997c49bf3ff6575.tar.gz gcc-cc99c5fefc057335b9ed6928d997c49bf3ff6575.tar.bz2 | |
re PR tree-optimization/45633 (internal compiler error: verify_stmts failed)
PR tree-optimization/45633
* tree-cfg.c (verify_gimple_assign_binary): Allow
MINUS_EXPR with lhs and rhs1 pointer vector and
rhs2 sizetype vector.
* expr.c (expand_expr_real_2) <case PLUS_EXPR>: For pointer
or vector pointer use TER to optimize pointer subtraction.
* gcc.dg/vect/pr45633.c: New test.
From-SVN: r164312
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 19 |
1 files changed, 19 insertions, 0 deletions
@@ -7572,6 +7572,24 @@ expand_expr_real_2 (sepops ops, rtx target, enum machine_mode tmode, } } + /* Use TER to expand pointer addition of a negated value + as pointer subtraction. */ + if ((POINTER_TYPE_P (TREE_TYPE (treeop0)) + || (TREE_CODE (TREE_TYPE (treeop0)) == VECTOR_TYPE + && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (treeop0))))) + && TREE_CODE (treeop1) == SSA_NAME + && TYPE_MODE (TREE_TYPE (treeop0)) + == TYPE_MODE (TREE_TYPE (treeop1))) + { + gimple def = get_def_for_expr (treeop1, NEGATE_EXPR); + if (def) + { + treeop1 = gimple_assign_rhs1 (def); + code = MINUS_EXPR; + goto do_minus; + } + } + /* No sense saving up arithmetic to be done if it's all in the wrong mode to form part of an address. And force_operand won't know whether to sign-extend or @@ -7593,6 +7611,7 @@ expand_expr_real_2 (sepops ops, rtx target, enum machine_mode tmode, return REDUCE_BIT_FIELD (simplify_gen_binary (PLUS, mode, op0, op1)); case MINUS_EXPR: + do_minus: /* For initializers, we are allowed to return a MINUS of two symbolic constants. Here we handle all cases when both operands are constant. */ |