Why does the assembly code sometimes store the register values into RAM and sometimes not?

I have two pieces of code that are very similar. Both of the code are compiled with the `-O0` flag in AC5. When I look at the assembly of the first code, I found that some variables loaded into registers...
Why does the assembly code sometimes store the register values into RAM and sometimes not?

I have two pieces of code that are very similar. Both of the code are compiled with the `-O0` flag in AC5. When I look at the assembly of the first code, I found that some variables loaded into registers...
Temp files sometimes not created during build in uVision 5

I run an undergraduate laboratory where we use Keil uVision 5 to compile code for an LPC1768. Frequently, students will see errors that look like this: "no source": Error: command-line: #564: cannot...
ARM: I am trouble :Some time coade work and sometime not

Dear all Here I am in trouble due to unexpected performance of my LPC2378. I am using keil uVision3 compiler and LPC2378 processor. My code is working some time properly all result i am getting...
ARM: I am trouble :Some time coade work and sometime not

Dear all Here I am in trouble due to unexpected performance of my LPC2378. I am using keil uVision3 compiler and LPC2378 processor. My code is working some time properly all result i am getting...