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| author | Luc Van Oostenryck <luc.vanoostenryck@gmail.com> | 2020-08-29 20:51:30 +0200 |
|---|---|---|
| committer | Luc Van Oostenryck <luc.vanoostenryck@gmail.com> | 2020-10-24 22:57:44 +0200 |
| commit | f28372ddc5f19bbed4fbd6cff33bb111a4261ce7 (patch) | |
| tree | fe7dfe1ceea2d3679a2885d6ec7343dfc333c465 /simplify.c | |
| parent | 9577415162562118976aef3d5c11765882186366 (diff) | |
| download | sparse-dev-f28372ddc5f19bbed4fbd6cff33bb111a4261ce7.tar.gz | |
unop: simplify -(~x) --> x + 1
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Diffstat (limited to 'simplify.c')
| -rw-r--r-- | simplify.c | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -1477,6 +1477,10 @@ static int simplify_unop(struct instruction *insn) return replace_pseudo(insn, &insn->src1, src); case OP_NEG: // -(-x) --> x return replace_with_pseudo(insn, def->src); + case OP_NOT: + insn->opcode = OP_ADD; // -(~x) --> x + 1 + insn->src2 = value_pseudo(1); + return replace_pseudo(insn, &insn->src1, def->src); case OP_SUB: insn->opcode = OP_SUB; // -(x - y) --> y - x use_pseudo(insn, def->src1, &insn->src2); |