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@@ -75,38 +75,6 @@ when doing 'make test'. Please read tcc-doc.html to have all the features of TCC. -Technical Description: ---------------------- - -This is not my first C compiler (see my 'fbcc' compiler) but it -contains the first C preprocessor I wrote. The project started as a -joke to make the smallest C compiler. Then I expanded it torward -ISOC99 compliance. This C compiler is particular because each feature -was added while trying to be as simple and compact as possible. For -example, no intermediate structure is used to store code or -expressions. - -The TCC code generator directly generates linked binary code. It is -rather unusual these days (see gcc for example which generates text -assembly), but it allows to be very fast and surprisingly not so -complicated. - -The TCC code generator is register based. It means that it could even -generate not so bad code for RISC processors. On x86, three temporary -registers are used. When more registers are needed, one register is -flushed in a new local variable. - -Constant propagation is done for all operations. Multiplications and -divisions are optimized to shifts when appropriate. Comparison -operators are optimized by maintaining a special cache for the -processor flags. &&, || and ! are optimized by maintaining a special -'jump target' value. No other jump optimization is currently performed -because it would require to store the code in a more abstract fashion. - -The types are stored in a single 'int' variable (see VT_xxx -constants). It was choosen in the first stages of development when tcc -was much simpler. Now, it may not be the best solution. - License: ------- |