[PATCH] accel/tcg: Fix append_mem_cb

[PATCH] accel/tcg: Fix append_mem_cb

[Richard Henderson]

In fcdab382c8b9 we removed a tcg_gen_extu_tl_i64 from gen_empty_mem_cb,
and failed to adjust the associated copy, leading to a failed assert.

Fixes: fcdab382c8b9 ("accel/tcg: Widen plugin_gen_empty_mem_callback to i64")
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 accel/tcg/plugin-gen.c | 42 ------------------------------------------
 1 file changed, 42 deletions(-)

diff --git a/accel/tcg/plugin-gen.c b/accel/tcg/plugin-gen.c
index 34be1b940c..5b73a39ce5 100644
--- a/accel/tcg/plugin-gen.c
+++ b/accel/tcg/plugin-gen.c
@@ -254,33 +254,6 @@ static TCGOp *copy_op(TCGOp **begin_op, TCGOp *op, TCGOpcode opc)
     return op;
 }
 
-static TCGOp *copy_extu_i32_i64(TCGOp **begin_op, TCGOp *op)
-{
-    if (TCG_TARGET_REG_BITS == 32) {
-        /* mov_i32 */
-        op = copy_op(begin_op, op, INDEX_op_mov_i32);
-        /* mov_i32 w/ $0 */
-        op = copy_op(begin_op, op, INDEX_op_mov_i32);
-    } else {
-        /* extu_i32_i64 */
-        op = copy_op(begin_op, op, INDEX_op_extu_i32_i64);
-    }
-    return op;
-}
-
-static TCGOp *copy_mov_i64(TCGOp **begin_op, TCGOp *op)
-{
-    if (TCG_TARGET_REG_BITS == 32) {
-        /* 2x mov_i32 */
-        op = copy_op(begin_op, op, INDEX_op_mov_i32);
-        op = copy_op(begin_op, op, INDEX_op_mov_i32);
-    } else {
-        /* mov_i64 */
-        op = copy_op(begin_op, op, INDEX_op_mov_i64);
-    }
-    return op;
-}
-
 static TCGOp *copy_const_ptr(TCGOp **begin_op, TCGOp *op, void *ptr)
 {
     if (UINTPTR_MAX == UINT32_MAX) {
@@ -295,18 +268,6 @@ static TCGOp *copy_const_ptr(TCGOp **begin_op, TCGOp *op, void *ptr)
     return op;
 }
 
-static TCGOp *copy_extu_tl_i64(TCGOp **begin_op, TCGOp *op)
-{
-    if (TARGET_LONG_BITS == 32) {
-        /* extu_i32_i64 */
-        op = copy_extu_i32_i64(begin_op, op);
-    } else {
-        /* mov_i64 */
-        op = copy_mov_i64(begin_op, op);
-    }
-    return op;
-}
-
 static TCGOp *copy_ld_i64(TCGOp **begin_op, TCGOp *op)
 {
     if (TCG_TARGET_REG_BITS == 32) {
@@ -451,9 +412,6 @@ static TCGOp *append_mem_cb(const struct qemu_plugin_dyn_cb *cb,
         tcg_debug_assert(begin_op && begin_op->opc == INDEX_op_ld_i32);
     }
 
-    /* extu_tl_i64 */
-    op = copy_extu_tl_i64(&begin_op, op);
-
     if (type == PLUGIN_GEN_CB_MEM) {
         /* call */
         op = copy_call(&begin_op, op, HELPER(plugin_vcpu_mem_cb),
-- 
2.34.1

Re: [PATCH] accel/tcg: Fix append_mem_cb

[Alex Bennée]

Richard Henderson <richard.henderson@linaro.org> writes:

> In fcdab382c8b9 we removed a tcg_gen_extu_tl_i64 from gen_empty_mem_cb,
> and failed to adjust the associated copy, leading to a failed assert.
>
> Fixes: fcdab382c8b9 ("accel/tcg: Widen plugin_gen_empty_mem_callback to i64")
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>

-- 
Alex Bennée
Virtualisation Tech Lead @ Linaro

Re: [PATCH] accel/tcg: Fix append_mem_cb

[Richard Henderson]

On 5/18/23 08:34, Alex Bennée wrote:
> 
> Richard Henderson <richard.henderson@linaro.org> writes:
> 
>> In fcdab382c8b9 we removed a tcg_gen_extu_tl_i64 from gen_empty_mem_cb,
>> and failed to adjust the associated copy, leading to a failed assert.
>>
>> Fixes: fcdab382c8b9 ("accel/tcg: Widen plugin_gen_empty_mem_callback to i64")
>> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> 
> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
> Tested-by: Alex Bennée <alex.bennee@linaro.org>

Applied directly to master to solve the regression.

r~