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authorRichard Henderson <rth@twiddle.net>2016-10-23 20:44:32 -0700
committerRichard Henderson <rth@twiddle.net>2017-01-10 08:06:10 -0800
commit333b21b809fc80ce67c8f6a7d1c7cc66437d9791 (patch)
tree73ea27d899c3480ef32a2053f79b496c86b37c17 /tcg
parentf6156b8fb01177c7c8e82999e0b1ab6de8385179 (diff)
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tcg/optimize: Fold movcond 0/1 into setcond
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg')
-rw-r--r--tcg/optimize.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c
index f41ed2c..9e26bb7 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1105,6 +1105,21 @@ void tcg_optimize(TCGContext *s)
tcg_opt_gen_mov(s, op, args, args[0], args[4-tmp]);
break;
}
+ if (temp_is_const(args[3]) && temp_is_const(args[4])) {
+ tcg_target_ulong tv = temps[args[3]].val;
+ tcg_target_ulong fv = temps[args[4]].val;
+ TCGCond cond = args[5];
+ if (fv == 1 && tv == 0) {
+ cond = tcg_invert_cond(cond);
+ } else if (!(tv == 1 && fv == 0)) {
+ goto do_default;
+ }
+ args[3] = cond;
+ op->opc = opc = (opc == INDEX_op_movcond_i32
+ ? INDEX_op_setcond_i32
+ : INDEX_op_setcond_i64);
+ nb_iargs = 2;
+ }
goto do_default;
case INDEX_op_add2_i32: