diff options
| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-01-21 21:59:34 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-01-21 21:59:34 +0000 |
| commit | 27f3dbf1ba4b01d4b8751a226fdff226896fde23 (patch) | |
| tree | 1fa4ffd08de9e492888996917c3d6e158166d429 /gcc/simplify-rtx.c | |
| parent | 1a3631bc88c877bb4d37b2604d849a55e7760b19 (diff) | |
| download | gcc-27f3dbf1ba4b01d4b8751a226fdff226896fde23.tar.gz | |
PR debug/64511
* simplify-rtx.c (simplify_relational_operation_1): Don't try to
optimize (eq/ne (and (side_effects) (const_int 0)) (const_int 0))
into (eq/ne (and (not (side_effects)) (const_int 0)) (const_int 0)).
* gcc.dg/pr64511.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@219974 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index d26267d1717..5c9e3bf1667 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -4589,7 +4589,8 @@ simplify_relational_operation_1 (enum rtx_code code, machine_mode mode, if ((code == EQ || code == NE) && op0code == AND && rtx_equal_p (XEXP (op0, 0), op1) - && !side_effects_p (op1)) + && !side_effects_p (op1) + && op1 != CONST0_RTX (cmp_mode)) { rtx not_y = simplify_gen_unary (NOT, cmp_mode, XEXP (op0, 1), cmp_mode); rtx lhs = simplify_gen_binary (AND, cmp_mode, not_y, XEXP (op0, 0)); @@ -4602,7 +4603,8 @@ simplify_relational_operation_1 (enum rtx_code code, machine_mode mode, if ((code == EQ || code == NE) && op0code == AND && rtx_equal_p (XEXP (op0, 1), op1) - && !side_effects_p (op1)) + && !side_effects_p (op1) + && op1 != CONST0_RTX (cmp_mode)) { rtx not_x = simplify_gen_unary (NOT, cmp_mode, XEXP (op0, 0), cmp_mode); rtx lhs = simplify_gen_binary (AND, cmp_mode, not_x, XEXP (op0, 1)); |