看UE4的Shader代码的时候经常会看到if语句之前会有branch,flatten关键词,而for循环前面会有unroll,loop这样的关键词,比如如下代码: UNROLL for (uint k = 0; k < Radius; k++) { float BucketDistance = fRadiusMultiplier * (float(k + 1) * COC_TILE_SIZE) - COC_TILE_SIZE FLATTEN if (-OutSampleBu...
In the second DO loop, the compiler determines how to unroll the loop for maximum performance. PROGRAM GOODUNROLL INTEGER I, X(1000) REAL A, B, C, TEMP, Y(1000) !IBM* UNROLL(3) DO I = 1, 1000 X(I) = X(I) + 1 END DO !IBM* UNROLL DO I = 1, 1000 A = -I B = I...
Example 1:In this example, theUNROLL(2)directive is used to tell the compiler that the body of the loop can be replicated so that the work of two iterations is performed in a single iteration. Instead of performing 1000 iterations, if the compiler unrolls the loop, it will only perform ...
By default, the compiler unrolls small loops with a known trip count. The #pragma unroll directive however can be used to control unrolling of any given loop. It must be placed immediately before the loop and only applies to that loop. It is optionally followed by an integral constant expre...
loop_1: for(int i = 0; i < N; i++) { #pragma HLS unroll a[i] = b[i] + c[i]; } Example 2 此示例指定展开因子 4 以部分展开函数 foo 的 loop_2,并删除退出检查。 void foo (...) { int8 array1[M]; int12 array2[N]; ...
(modified) llvm/lib/Transforms/Utils/LoopPeel.cpp (+3-3) (modified) llvm/test/Transforms/LoopUnroll/peel-loop-conditions-pgo-1.ll (+4-3) diff --git a/llvm/include/llvm/Transforms/Utils/LoopPeel.h b/llvm/include/llvm/Transforms/Utils/LoopPeel.hindex 0b78700ca71bb9..987c21b7ca5610 100...
The first loop is unrolled and subsequent operations are performed in the inner loop. This helps keep the array in cache to be reused. Get type(fullfile("codegen","lib","unrollAndJamTransform","unrollAndJamTransform.c")) /* * File: unrollAndJamTransform.c * * MATLAB Coder version : ...
This is the canonical git mirror of the LLVM subversion repository. The repository does not accept github pull requests at this moment. Please submit your patches at http://reviews.llvm.org. - Revert "[LoopUnroll] Clamp PartialThreshold for large LoopMic
The compiler's code generator makes its decision to unroll loops depending on a number of factors. The compiler might decline to unroll a loop even though this option is specified withn>1. If a DO loop with a variable loop limit can be unrolled, both an unrolled version and the original...
ARM_MATH_LOOPUNROLL:用于4个为一组的的小批量处理上，加快执行速度。通过下面的求绝对值函数，可以方便...