2008/12/3 James Courtier-Dutton <[EMAIL PROTECTED]>: > Example C code: > a = 1; > if (condition) a = 2; > b = a; > > In SSA (use $ for the Phi, Φ) > a1 = 1; > if (condition) a2 = 2; > a3 = $(a1, a2); > b1 = a3; > > My problem is how do I convert the "a3 = $(a1, a2);" back to normal C code?
Try using -fdump-tree-ssa and -fdump-tree-optimized to show you both the SSA and normal form for the program. If you use mainline GCC you can get the SSA form of the program even with optimizations turned off. For previous releases of GCC you'll need to enable optimizations to get the SSA form. The dump output is C-like, but not compilable in general (needs declarations and some syntax is usually not valid C). Diego.
