tcg/optimize: fix setcond2 optimization

When setcond2 is rewritten into setcond, the state of the destination temp should be reset, so that a copy of the previous value is not used instead of the result. Reported-by: Michael Tokarev <[email protected]> Reviewed-by: Richard Henderson <[email protected]> Signed-off-by: Aurelien Jarno <[email protected]>
mv0 · May 9, 2013 · 66e61b5 · 66e61b5
1 parent 47ec15c
commit 66e61b5
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/tcg/optimize.c b/tcg/optimize.c
@@ -1057,6 +1057,7 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
                 /* Simplify LT/GE comparisons vs zero to a single compare
                    vs the high word of the input.  */
                 s->gen_opc_buf[op_index] = INDEX_op_setcond_i32;
+                reset_temp(args[0]);
                 gen_args[0] = args[0];
                 gen_args[1] = args[2];
                 gen_args[2] = args[4];