tcg: Implement insert_op_before

Rather reserving space in the op stream for optimization,
let the optimizer add ops as necessary.

Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Richard Henderson <rth@twiddle.net>

1 files changed, 0 insertions, 21 deletions

diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index cbaa15ccb9..afa351dc70 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -57,11 +57,6 @@ static void tcg_emit_op(TCGContext *ctx, TCGOpcode opc, int args)
     };
 }
 
-void tcg_gen_op0(TCGContext *ctx, TCGOpcode opc)
-{
-    tcg_emit_op(ctx, opc, -1);
-}
-
 void tcg_gen_op1(TCGContext *ctx, TCGOpcode opc, TCGArg a1)
 {
     int pi = ctx->gen_next_parm_idx;
@@ -571,8 +566,6 @@ void tcg_gen_add2_i32(TCGv_i32 rl, TCGv_i32 rh, TCGv_i32 al,
 {
     if (TCG_TARGET_HAS_add2_i32) {
         tcg_gen_op6_i32(INDEX_op_add2_i32, rl, rh, al, ah, bl, bh);
-        /* Allow the optimizer room to replace add2 with two moves.  */
-        tcg_gen_op0(&tcg_ctx, INDEX_op_nop);
     } else {
         TCGv_i64 t0 = tcg_temp_new_i64();
         TCGv_i64 t1 = tcg_temp_new_i64();
@@ -590,8 +583,6 @@ void tcg_gen_sub2_i32(TCGv_i32 rl, TCGv_i32 rh, TCGv_i32 al,
 {
     if (TCG_TARGET_HAS_sub2_i32) {
         tcg_gen_op6_i32(INDEX_op_sub2_i32, rl, rh, al, ah, bl, bh);
-        /* Allow the optimizer room to replace sub2 with two moves.  */
-        tcg_gen_op0(&tcg_ctx, INDEX_op_nop);
     } else {
         TCGv_i64 t0 = tcg_temp_new_i64();
         TCGv_i64 t1 = tcg_temp_new_i64();
@@ -608,8 +599,6 @@ void tcg_gen_mulu2_i32(TCGv_i32 rl, TCGv_i32 rh, TCGv_i32 arg1, TCGv_i32 arg2)
 {
     if (TCG_TARGET_HAS_mulu2_i32) {
         tcg_gen_op4_i32(INDEX_op_mulu2_i32, rl, rh, arg1, arg2);
-        /* Allow the optimizer room to replace mulu2 with two moves.  */
-        tcg_gen_op0(&tcg_ctx, INDEX_op_nop);
     } else if (TCG_TARGET_HAS_muluh_i32) {
         TCGv_i32 t = tcg_temp_new_i32();
         tcg_gen_op3_i32(INDEX_op_mul_i32, t, arg1, arg2);
@@ -632,8 +621,6 @@ void tcg_gen_muls2_i32(TCGv_i32 rl, TCGv_i32 rh, TCGv_i32 arg1, TCGv_i32 arg2)
 {
     if (TCG_TARGET_HAS_muls2_i32) {
         tcg_gen_op4_i32(INDEX_op_muls2_i32, rl, rh, arg1, arg2);
-        /* Allow the optimizer room to replace muls2 with two moves.  */
-        tcg_gen_op0(&tcg_ctx, INDEX_op_nop);
     } else if (TCG_TARGET_HAS_mulsh_i32) {
         TCGv_i32 t = tcg_temp_new_i32();
         tcg_gen_op3_i32(INDEX_op_mul_i32, t, arg1, arg2);
@@ -1648,8 +1635,6 @@ void tcg_gen_add2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 al,
 {
     if (TCG_TARGET_HAS_add2_i64) {
         tcg_gen_op6_i64(INDEX_op_add2_i64, rl, rh, al, ah, bl, bh);
-        /* Allow the optimizer room to replace add2 with two moves.  */
-        tcg_gen_op0(&tcg_ctx, INDEX_op_nop);
     } else {
         TCGv_i64 t0 = tcg_temp_new_i64();
         TCGv_i64 t1 = tcg_temp_new_i64();
@@ -1668,8 +1653,6 @@ void tcg_gen_sub2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 al,
 {
     if (TCG_TARGET_HAS_sub2_i64) {
         tcg_gen_op6_i64(INDEX_op_sub2_i64, rl, rh, al, ah, bl, bh);
-        /* Allow the optimizer room to replace sub2 with two moves.  */
-        tcg_gen_op0(&tcg_ctx, INDEX_op_nop);
     } else {
         TCGv_i64 t0 = tcg_temp_new_i64();
         TCGv_i64 t1 = tcg_temp_new_i64();
@@ -1687,8 +1670,6 @@ void tcg_gen_mulu2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 arg1, TCGv_i64 arg2)
 {
     if (TCG_TARGET_HAS_mulu2_i64) {
         tcg_gen_op4_i64(INDEX_op_mulu2_i64, rl, rh, arg1, arg2);
-        /* Allow the optimizer room to replace mulu2 with two moves.  */
-        tcg_gen_op0(&tcg_ctx, INDEX_op_nop);
     } else if (TCG_TARGET_HAS_muluh_i64) {
         TCGv_i64 t = tcg_temp_new_i64();
         tcg_gen_op3_i64(INDEX_op_mul_i64, t, arg1, arg2);
@@ -1708,8 +1689,6 @@ void tcg_gen_muls2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 arg1, TCGv_i64 arg2)
 {
     if (TCG_TARGET_HAS_muls2_i64) {
         tcg_gen_op4_i64(INDEX_op_muls2_i64, rl, rh, arg1, arg2);
-        /* Allow the optimizer room to replace muls2 with two moves.  */
-        tcg_gen_op0(&tcg_ctx, INDEX_op_nop);
     } else if (TCG_TARGET_HAS_mulsh_i64) {
         TCGv_i64 t = tcg_temp_new_i64();
         tcg_gen_op3_i64(INDEX_op_mul_i64, t, arg1, arg2);