Very, Very strange problem while calling a function "normally" VERSUS "inlining"

Hi All.

I had been making some changes to the tiva-blinky example, on the Tiva-Launchpad board.

The code is as follows ::

#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include "src/common/include/globals.h"

#include "inc/hw_types.h"
#include "inc/hw_gpio.h"
#include "inc/hw_memmap.h"
#include "inc/hw_sysctl.h"
#include "driverlib/gpio.h"
#include "driverlib/rom.h"
#include "driverlib/sysctl.h"
#include "driverlib/pin_map.h"
#include "driverlib/can.h"

#define LED_RED GPIO_PIN_1
#define LED_BLUE GPIO_PIN_2
#define LED_GREEN GPIO_PIN_3



int main()
{
    char m[100];
    SG_MEMSET(m, 0, 100)

    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4|SYSCTL_USE_PLL|SYSCTL_XTAL_16MHZ|SYSCTL_OSC_MAIN);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
    ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, LED_RED|LED_BLUE|LED_GREEN);

   for (;;) {
    // set the red LED pin high, others low
    ROM_GPIOPinWrite(GPIO_PORTF_BASE, LED_RED|LED_GREEN|LED_BLUE, LED_BLUE);
    ROM_SysCtlDelay(5000000);
    ROM_GPIOPinWrite(GPIO_PORTF_BASE, LED_RED|LED_GREEN|LED_BLUE, 0);
    ROM_SysCtlDelay(5000000);
    }

}

Now, two cases arise ::

a)

SG_MEMSET is

#define SG_MEMSET(dest, byte, size)                             \
    {                                                           \
        char temp[MAX_BUFFER_SIZE] = {byte};                    \
        memcpy(dest, temp, size);                               \
    }

In this "inlining" case, the BLUE light blinks fine as expected.

b)

SG_MEMSET is

void DO_SG_MEMSET(char *dest, char byte, unsigned int size)
{
    char temp[MAX_BUFFER_SIZE] = {byte};
    memcpy(dest, temp, size);
}

#define SG_MEMSET(dest, byte, size)     DO_SG_MEMSET(dest, byte, size);

In this "normal-function-calling" case, no light blinks :(

I am at a complete-loss why this could be happening.

Are multiple-frames/function-calling disabled on Tiva-Launchpad?

For brevity, here is the linker-script being used ::

MEMORY
{
    FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 0x00040000
    SRAM (rwx) : ORIGIN = 0x20000000, LENGTH = 0X00008000
}

SECTIONS
{
    /* code */
    .text :
    {
        _text = .;
        /* ensure ISR vectors are not removed by linker */
        KEEP(*(.isr_vector))
        *(.text*)
        *(.rodata*)
        _etext = .;
    } > FLASH

    /* static data */
    .data : AT(ADDR(.text) + SIZEOF(.text))
    {
        _data = .;
        *(vtable)
        *(.data*)
        _edata = .;
    } > SRAM

    /* static uninitialized data */
    .bss :
    {
        _bss = .;
        *(.bss*)
        *(COMMON)
        _ebss = .;
    } > SRAM

}

Will be grateful for any pointers. I cannot move forward before resolving this very basic issue :-\

Thanks and Regards,

Ajay