On Tue, May 24, 2011 at 4:22 PM, Ian Lance Taylor <iant@xxxxxxxxxx> wrote: > > Rony Paul <ronypaul77@xxxxxxxxx> writes: > > > I user declare a variable "x", then when compiler executes that and > > stores in memory, can you tell me what is the rtx code for storing > > that variable? and in which file in GCC it is done? > > It's difficult to answer that question in a simple way. Assuming you > are using C, the C frontend will create a VAR_DECL for x. If you assign > a value to that variable, it will create a MODIFY_EXPR. The MODIFY_EXPR > will then be converted to a GIMPLE_ASSIGN statement in GIMPLE. This > will then eventually be converted to an RTL SET. So the rtx code is > SET. If this is a local variable which is stored in memory rather than > in a register, the stack space will be allocated by assign_stack_local. > > Ian suppose I have the following piece of code in my program. extern int __ea x; int y; y = x; that means I am copying data from one address space to another. in that case will the method spu_addr_space_convert (rtx op, tree from_type, tree to_type); be called by the compiler? in the spu.c file the defination of " spu_addr_space_convert " is given. but when and under which condition they will be called ?where is it defined?
