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Module dmd.toir

Convert to Intermediate Representation (IR) for the back-end.




buildAlignSection(fd, irs) Aligned sections are implemented by taking the local variables that need alignment that is larger than the stack alignment. They are allocated into a separate chunk of memory on the stack called an align section, which is aligned on function entry.
buildCapture(fd) build a debug info struct for variables captured by nested functions, but not in a closure. must be called after generating the function to fill stack offsets
buildClosure(fd, irs) Closures are implemented by taking the local variables that need to survive the scope of the function, and copying them into a gc allocated chuck of memory. That chunk, called the closure here, is inserted into the linked list of stack frames instead of the usual stack frame.
fixEthis2(ethis, fd, ctxt2) Select one context pointer from a dual-context array
getEthis(loc, irs, fd, fdp, origSc) Return elem that evaluates to the static frame pointer for function fd. If fd is a member function, the returned expression will compute the value of fd's 'this' variable. 'fdp' is the parent of 'fd' if the frame pointer is being used to call 'fd'. 'origSc' is the original scope we inlined from. This routine is critical for implementing nested functions.
getParentClosureType(sthis, fd) for a nested function 'fd' return the type of the closure of an outer function or aggregate. If the function is a member function the 'this' type is expected to be stored in 'sthis.Sthis'. It is always returned if it is not a void pointer. buildClosure() must have been called on the outer function before.
incUsageElem(irs, loc) Produce elem which increments the usage count for a particular line. Sets corresponding bit in bitmap m.covb[linnum]. Used to implement -cov switch (coverage analysis).
intrinsic_op(fd) Convert intrinsic function to operator.
resolveLengthVar(lengthVar, pe, t1) Given an expression e that is an array, determine and set the 'length' variable.
retStyle(tf, needsThis) Determine return style of function - whether in registers or through a hidden pointer to the caller's stack.
setClosureVarOffset(fd) Go through the variables in function fd that are to be allocated in a closure, and set the .offset fields for those variables to their positions relative to the start of the closure instance. Also turns off nrvo for closure variables.
setEthis(loc, irs, ey, ad, setthis2) Initialize the hidden aggregate member, vthis, with the context pointer.


IRState Collect state variables needed by the intermediate representation (IR)
Label Our label symbol


Walter Bright


Boost License 1.0