search for: multmp

...mple that optimizes calls to functions without side effects. Specifically, ready> extern sin(x); ready> extern cos(x); ready> def foo(x) sin(x)*sin(x) + cos(x)*cos(x); Read function definition: define double @foo(double %x) { entry: %calltmp = call double @sin(double %x) %multmp = fmul double %calltmp, %calltmp %calltmp2 = call double @cos(double %x) %multmp4 = fmul double %calltmp2, %calltmp2 %addtmp = fadd double %multmp, %multmp4 ret double %addtmp } I find that when I run the code, the calls to sin and cos aren't optimized and, inst...

...ample that optimizes calls to functions without side effects. Specifically, ready> extern sin(x); ready> extern cos(x); ready> def foo(x) sin(x)*sin(x) + cos(x)*cos(x); Read function definition: define double @foo(double %x) { entry: %calltmp = call double @sin(double %x) %multmp = fmul double %calltmp, %calltmp %calltmp2 = call double @cos(double %x) %multmp4 = fmul double %calltmp2, %calltmp2 %addtmp = fadd double %multmp, %multmp4 ret double %addtmp } I find that when I run the code, the calls to sin and cos aren't optimized and, inst...

Chris Lattner <clattner at apple.com> writes: > On Nov 5, 2010, at 7:11 AM, Kirk Kelsey wrote: > >> I'm wondering what the longer term plans are for the C Backend. I >> understand it's not actively developed, even deprecated. What I'm not >> clear about is whether it's something that is viewed as non-vital and >> should just as well go away, or

...s()); // Simplify the control flow graph (deleting unreachable blocks, etc). OurFPM.add(createCFGSimplificationPass()); It does simplify _some_ things. For example: ready> def simplifyThis(x) (x*2)+(2*x); Read function definition: define double @simplifyThis(double %x) readonly { entry: %multmp = fmul double %x, 2.000000e+00 %addtmp = fadd double %multmp, %multmp ret double %addtmp } > -----Original Message----- > From: Duncan Sands [mailto:baldrick at free.fr] > Sent: Monday, November 15, 2010 2:57 PM > To: llvmdev at cs.uiuc.edu > Subject: Re: [LLVMdev] Optimization...

...ction::Create but I still get the same result (though flagged with "readonly") declare double @sin(double) readonly declare double @cos(double) readonly define double @foo(double %x) readonly { entry: %calltmp = call double @sin(double %x) %calltmp1 = call double @sin(double %x) %multmp = fmul double %calltmp, %calltmp1 %calltmp2 = call double @cos(double %x) %calltmp3 = call double @cos(double %x) %multmp4 = fmul double %calltmp2, %calltmp3 %addtmp = fadd double %multmp, %multmp4 ret double %addtmp }

...e @sin(double 1.000000e+00)", though, inspite of the same optimizations as in your listing... - "ready> def foo(x) sin(x)*sin(x) + cos(x)*cos(x); Read function definition: define double @foo(double %x) { entry: %calltmp = call double @sin(double %x) %multmp = fmul double %calltmp, %calltmp %calltmp2 = call double @cos(double %x) %multmp4 = fmul double %calltmp2, %calltmp2 %addtmp = fadd double %multmp, %multmp4 ret double %addtmp }": In my case, the CSE does not work, although it does work for the example...

...[#uses=1] %forcond4 = fcmp olt double %time2, %OS_end3 ; <i1> [#uses=1] br i1 %forcond4, label %forbody, label %forafter forbody: ; preds = %forcond %birth_rate5 = load double* %birth_rate ; <double> [#uses=1] %population6 = load double* %population ; <double> [#uses=1] %multmp = mul double %birth_rate5, %population6 ; <double> [#uses=1] store double %multmp, double* %births %population7 = load double* %population ; <double> [#uses=1] %multmp8 = mul double 1.000000e-01, %population7 ; <double> [#uses=1] store double %multmp8, double* %deaths %bir...

...eone could point in the right direction. What I want to do is with the kaleidoscope tutorial code, take the IR from a run where I've just done " def test(x) 42.0*x; " resulting in the file test.ll " ; ModuleID = 'my cool jit' define double @test(double %x) { entry: %multmp = fmul double %x, 4.200000e+01 ; <double> [#uses=1] ret double %multmp } " and the use llvm-ar to compile that test.ll to a test.bc and then compile that to a .S which I can pass to the Android NDK to compile. I've tried (to cut a long day short!) Compiling llvm with the...

Hi Rob, > Hmm ... I tried setting that right after Function::Create but I still get the same result (though flagged with "readonly") did you run the gvn pass (preceded by basic-aa)? Ciao, Duncan.

...double @average(double %x, double %y) { > entry: >   %y2 = alloca double >   %x1 = alloca double >   store double %x, double* %x1 >   store double %y, double* %y2 >   %x3 = load double, double* %x1 >   %y4 = load double, double* %y2 >   %addtmp = fadd double %x3, %y4 >   %multmp = fmul double %addtmp, 5.000000e-01 >   ret double %multmp > } > > > Any  ideas what you might be doing differently that I could do to try > to reproduce the failure you're seeing? > > On Thu, Jan 24, 2019 at 9:36 AM preejackie via llvm-dev > <llvm-dev at lists.l...

...s()); // Simplify the control flow graph (deleting unreachable blocks, etc). OurFPM.add(createCFGSimplificationPass()); It does simplify _some_ things. For example: ready> def simplifyThis(x) (x*2)+(2*x); Read function definition: define double @simplifyThis(double %x) readonly { entry: %multmp = fmul double %x, 2.000000e+00 %addtmp = fadd double %multmp, %multmp ret double %addtmp } > -----Original Message----- > From: Duncan Sands [mailto:baldrick at free.fr] > Sent: Monday, November 15, 2010 2:57 PM > To: llvmdev at cs.uiuc.edu > Subject: Re: [LLVMdev] Optimization...

...leting unreachable blocks, etc). > OurFPM.add(createCFGSimplificationPass()); > > It does simplify _some_ things. For example: > > ready> def simplifyThis(x) (x*2)+(2*x); > Read function definition: > define double @simplifyThis(double %x) readonly { > entry: > %multmp = fmul double %x, 2.000000e+00 > %addtmp = fadd double %multmp, %multmp > ret double %addtmp > } > > >> -----Original Message----- >> From: Duncan Sands [mailto:baldrick at free.fr] >> Sent: Monday, November 15, 2010 2:57 PM >> To: llvmdev at cs.uiuc.edu...

Hi all :) I'm new to llvm! I'm going through the kaleidoscope : compiling llvm IR to object code tutorial, code in the listings breaks and causes a segmentation fault. After some investigation through gdb, probably this constructor call, causing the segfault. |Program received signal SIGSEGV, Segmentation fault.|| ||0x00000000004afee0 in

...ml I was a bit confused at first because the AST node classes are called ASTs. Instead of saying "ExprAST node" all the time, who not just call the class ExprNode or ExprAstNode? http://llvm.org/docs/tutorial/LangImpl3.html case '<': L = Builder.CreateFCmpULT(L, R, "multmp"); Should this be something like "cmptmp"? Also, you mention zero-argument functions, but it doesn't look like you can parse function calls with zero arguments. http://llvm.org/docs/tutorial/LangImpl5.html At this point, you are probably starting to think "on no! Should b...

On Mon, 5 Nov 2007, Aaron Gray wrote: >> Anyone have thoughts or feedback? :) > > Nice job. The only bit that is not immediately clear is the 'Proto' > variable, but is clear when looking through the code at the end of the page. Where in the tutorial? What would you suggest that I say? > Could do with a link to the LLVMBuilder class reference material. I added a link

...->Codegen(); Value *R = RHS->Codegen(); if (L == 0 || R == 0) return 0; switch (Op) { case '+': return Builder.CreateAdd(L, R, "addtmp"); case '-': return Builder.CreateSub(L, R, "subtmp"); case '*': return Builder.CreateMul(L, R, "multmp"); case '<': L = Builder.CreateFCmpULT(L, R, "cmptmp"); // Convert bool 0/1 to double 0.0 or 1.0 return Builder.CreateUIToFP(L, Type::getDoubleTy(getGlobalContext()), "booltmp"); default: return ErrorV("invalid binary operator"); } }...

...*R = RHS->Codegen(); > if (L == 0 || R == 0) return 0; > > switch (Op) { > case '+': return Builder.CreateAdd(L, R, "addtmp"); > case '-': return Builder.CreateSub(L, R, "subtmp"); > case '*': return Builder.CreateMul(L, R, "multmp"); > case '<': > L = Builder.CreateFCmpULT(L, R, "cmptmp"); > // Convert bool 0/1 to double 0.0 or 1.0 > return Builder.CreateUIToFP(L, > Type::getDoubleTy(getGlobalContext()), "booltmp"); > default: return ErrorV("invalid binary...

...>>  if (L == 0 || R == 0) return 0; >> >>  switch (Op) { >>  case '+': return Builder.CreateAdd(L, R, "addtmp"); >>  case '-': return Builder.CreateSub(L, R, "subtmp"); >>  case '*': return Builder.CreateMul(L, R, "multmp"); >>  case '<': >>    L = Builder.CreateFCmpULT(L, R, "cmptmp"); >>    // Convert bool 0/1 to double 0.0 or 1.0 >>    return Builder.CreateUIToFP(L, >> Type::getDoubleTy(getGlobalContext()), "booltmp"); >>  default: return Err...