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Diffstat (limited to 'docs/tutorial/LangImpl6.html')
| -rw-r--r-- | docs/tutorial/LangImpl6.html | 68 |
1 files changed, 40 insertions, 28 deletions
diff --git a/docs/tutorial/LangImpl6.html b/docs/tutorial/LangImpl6.html index 31d7ff4..8876e83 100644 --- a/docs/tutorial/LangImpl6.html +++ b/docs/tutorial/LangImpl6.html @@ -293,8 +293,8 @@ Value *BinaryExprAST::Codegen() { Function *F = TheModule->getFunction(std::string("binary")+Op); assert(F && "binary operator not found!"); - Value *Ops[] = { L, R }; - return Builder.CreateCall(F, Ops, Ops+2, "binop");</b> + Value *Ops[2] = { L, R }; + return Builder.CreateCall(F, Ops, "binop");</b> } </pre> @@ -505,7 +505,9 @@ defined to print out the specified value and a newline):</p> <div class="doc_code"> <pre> ready> <b>extern printd(x);</b> -Read extern: declare double @printd(double) +Read extern: +declare double @printd(double) + ready> <b>def binary : 1 (x y) 0; # Low-precedence operator that ignores operands.</b> .. ready> <b>printd(123) : printd(456) : printd(789);</b> @@ -555,6 +557,9 @@ def binary& 6 (LHS RHS) def binary = 9 (LHS RHS) !(LHS < RHS | LHS > RHS); +# Define ':' for sequencing: as a low-precedence operator that ignores operands +# and just returns the RHS. +def binary : 1 (x y) y; </pre> </div> @@ -579,9 +584,10 @@ def printdensity(d) else putchard(42); # '*'</b> ... -ready> <b>printdensity(1): printdensity(2): printdensity(3) : - printdensity(4): printdensity(5): printdensity(9): putchard(10);</b> -*++.. +ready> <b>printdensity(1): printdensity(2): printdensity(3): + printdensity(4): printdensity(5): printdensity(9): + putchard(10);</b> +**++. Evaluated to 0.000000 </pre> </div> @@ -593,7 +599,7 @@ converge:</p> <div class="doc_code"> <pre> -# determine whether the specific location diverges. +# Determine whether the specific location diverges. # Solve for z = z^2 + c in the complex plane. def mandleconverger(real imag iters creal cimag) if iters > 255 | (real*real + imag*imag > 4) then @@ -603,25 +609,25 @@ def mandleconverger(real imag iters creal cimag) 2*real*imag + cimag, iters+1, creal, cimag); -# return the number of iterations required for the iteration to escape +# Return the number of iterations required for the iteration to escape def mandleconverge(real imag) mandleconverger(real, imag, 0, real, imag); </pre> </div> -<p>This "z = z<sup>2</sup> + c" function is a beautiful little creature that is the basis -for computation of the <a -href="http://en.wikipedia.org/wiki/Mandelbrot_set">Mandelbrot Set</a>. Our -<tt>mandelconverge</tt> function returns the number of iterations that it takes -for a complex orbit to escape, saturating to 255. This is not a very useful -function by itself, but if you plot its value over a two-dimensional plane, -you can see the Mandelbrot set. Given that we are limited to using putchard -here, our amazing graphical output is limited, but we can whip together +<p>This "<code>z = z<sup>2</sup> + c</code>" function is a beautiful little +creature that is the basis for computation of +the <a href="http://en.wikipedia.org/wiki/Mandelbrot_set">Mandelbrot Set</a>. +Our <tt>mandelconverge</tt> function returns the number of iterations that it +takes for a complex orbit to escape, saturating to 255. This is not a very +useful function by itself, but if you plot its value over a two-dimensional +plane, you can see the Mandelbrot set. Given that we are limited to using +putchard here, our amazing graphical output is limited, but we can whip together something using the density plotter above:</p> <div class="doc_code"> <pre> -# compute and plot the mandlebrot set with the specified 2 dimensional range +# Compute and plot the mandlebrot set with the specified 2 dimensional range # info. def mandelhelp(xmin xmax xstep ymin ymax ystep) for y = ymin, y < ymax, ystep in ( @@ -808,13 +814,19 @@ if/then/else and for expressions.. To build this example, use: <div class="doc_code"> <pre> - # Compile - g++ -g toy.cpp `llvm-config --cppflags --ldflags --libs core jit native` -O3 -o toy - # Run - ./toy +# Compile +clang++ -g toy.cpp `llvm-config --cppflags --ldflags --libs core jit native` -O3 -o toy +# Run +./toy </pre> </div> +<p>On some platforms, you will need to specify -rdynamic or -Wl,--export-dynamic +when linking. This ensures that symbols defined in the main executable are +exported to the dynamic linker and so are available for symbol resolution at +run time. This is not needed if you compile your support code into a shared +library, although doing that will cause problems on Windows.</p> + <p>Here is the code:</p> <div class="doc_code"> @@ -828,9 +840,9 @@ if/then/else and for expressions.. To build this example, use: #include "llvm/Analysis/Verifier.h" #include "llvm/Analysis/Passes.h" #include "llvm/Target/TargetData.h" -#include "llvm/Target/TargetSelect.h" #include "llvm/Transforms/Scalar.h" #include "llvm/Support/IRBuilder.h" +#include "llvm/Support/TargetSelect.h" #include <cstdio> #include <string> #include <map> @@ -1409,8 +1421,8 @@ Value *BinaryExprAST::Codegen() { Function *F = TheModule->getFunction(std::string("binary")+Op); assert(F && "binary operator not found!"); - Value *Ops[] = { L, R }; - return Builder.CreateCall(F, Ops, Ops+2, "binop"); + Value *Ops[2] = { L, R }; + return Builder.CreateCall(F, Ops, "binop"); } Value *CallExprAST::Codegen() { @@ -1429,7 +1441,7 @@ Value *CallExprAST::Codegen() { if (ArgsV.back() == 0) return 0; } - return Builder.CreateCall(CalleeF, ArgsV.begin(), ArgsV.end(), "calltmp"); + return Builder.CreateCall(CalleeF, ArgsV, "calltmp"); } Value *IfExprAST::Codegen() { @@ -1578,8 +1590,8 @@ Value *ForExprAST::Codegen() { Function *PrototypeAST::Codegen() { // Make the function type: double(double,double) etc. - std::vector<const Type*> Doubles(Args.size(), - Type::getDoubleTy(getGlobalContext())); + std::vector<Type*> Doubles(Args.size(), + Type::getDoubleTy(getGlobalContext())); FunctionType *FT = FunctionType::get(Type::getDoubleTy(getGlobalContext()), Doubles, false); @@ -1811,7 +1823,7 @@ int main() { <a href="mailto:sabre@nondot.org">Chris Lattner</a><br> <a href="http://llvm.org/">The LLVM Compiler Infrastructure</a><br> - Last modified: $Date: 2011-04-23 02:30:22 +0200 (Sat, 23 Apr 2011) $ + Last modified: $Date: 2011-10-16 10:07:38 +0200 (Sun, 16 Oct 2011) $ </address> </body> </html> |
