On 19/11/14 02:43, Joey Ye wrote:
Current thumb2 -Os generates suboptimal code for following tail call case:
int f4(int b, int a, int c, int d);
int g(int a, int b, int c, int d)
{ return f4(b, a, c, d); }
arm-none-eabi-gcc -Os -mthumb -mcpu=cortex-m3 test.c
push
{r4, lr}
mov r4, r1
mov r1,
Ping
On Wed, Nov 19, 2014 at 10:43 AM, Joey Ye wrote:
> Current thumb2 -Os generates suboptimal code for following tail call case:
>
> int f4(int b, int a, int c, int d);
> int g(int a, int b, int c, int d)
> { return f4(b, a, c, d); }
>
> arm-none-eabi-gcc -Os -mthumb -mcpu=cortex-m3 test.c
>
>
Current thumb2 -Os generates suboptimal code for following tail call case:
int f4(int b, int a, int c, int d);
int g(int a, int b, int c, int d)
{ return f4(b, a, c, d); }
arm-none-eabi-gcc -Os -mthumb -mcpu=cortex-m3 test.c
push
{r4, lr}
mov r4, r1
mov r1, r0
mov r0, r4
pop {r4, lr}
b f4
Ther
