diff options
| author | Alan Wu <[email protected]> | 2021-04-19 18:50:56 -0400 |
|---|---|---|
| committer | Alan Wu <[email protected]> | 2021-10-20 18:19:34 -0400 |
| commit | 10c0275b114d05631e649caaf7b2ddce893b5692 (patch) | |
| tree | b77cc6806f98c812a32e4754dd5fc9bbbd534268 | |
| parent | 1610dc0864a330006085ac9e9d6428b89d6c0ccd (diff) | |
Use jmp with memory operand for smaller code size
| -rw-r--r-- | yjit_codegen.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/yjit_codegen.c b/yjit_codegen.c index 39a2667f5d..f52de12bf2 100644 --- a/yjit_codegen.c +++ b/yjit_codegen.c @@ -2090,9 +2090,6 @@ gen_leave(jitstate_t* jit, ctx_t* ctx) // Load the return value mov(cb, REG0, ctx_stack_pop(ctx, 1)); - // Load the JIT return address - mov(cb, REG1, member_opnd(REG_CFP, rb_control_frame_t, jit_return)); - // Pop the current frame (ec->cfp++) // Note: the return PC is already in the previous CFP add(cb, REG_CFP, imm_opnd(sizeof(rb_control_frame_t))); @@ -2104,8 +2101,9 @@ gen_leave(jitstate_t* jit, ctx_t* ctx) mov(cb, REG_SP, member_opnd(REG_CFP, rb_control_frame_t, sp)); mov(cb, mem_opnd(64, REG_SP, -SIZEOF_VALUE), REG0); - // Jump to the JIT return address - jmp_rm(cb, REG1); + // Jump to the JIT return address in the frame that was popped + const int32_t offset_to_jit_return = -((int32_t)sizeof(rb_control_frame_t)) + (int32_t)offsetof(rb_control_frame_t, jit_return); + jmp_rm(cb, mem_opnd(64, REG_CFP, offset_to_jit_return)); return YJIT_END_BLOCK; } |