Developer Guide and Reference

Contents

Intel-Specific Pragma Reference

The pragmas that are specific to the
Intel® oneAPI
DPC++/C++
Compiler
are described below. Click on each pragma name for a more detailed description.
Some
pragmas
are available for both Intel® microprocessors and non-Intel microprocessors, but may perform additional optimizations for Intel® microprocessors than for non-Intel microprocessors.
Pragma
Description
Allocates one or more variables in the specified section. Controls section attribute specification for variables.
Instructs the compiler to prefer loop distribution at the location indicated.
Specifies inlining of all calls in a statement. This also describes pragmas forceinline and noinline.
For Intel legacy tasking, specifies a unit of work, potentially executed by a different thread.
For Intel legacy tasking, specifies an environment for the while loop in which to queue the units of work specified by the enclosed
task
pragma.
Instructs the compiler to ignore assumed vector dependencies.
Specifies the iterations for a for loop.
Prevents a loop from fusing with adjacent loops.
Specifies that a particular loop should never be vectorized.
Controls optimization for one function or all functions after its first occurrence.
Passes certain information about a function to the optimizer.
Extends
#pragma omp simd
, allowing vectorization of multiple exit loops.
Enables or disables optimizations for code after this pragma until another optimize pragma or end of the translation unit.
Resolves dependencies to facilitate auto-parallelization of the immediately following loop (parallel) or prevents auto-parallelization of the immediately following loop (noparallel).
Enforces vectorization of loops.
Specifies a block of code in the SIMD loop or SIMD-enabled function that should be executed serially, in a logical order of SIMD lanes.
Tells the compiler to unroll or not to unroll a counted loop.
Enables or disables loop unrolling and jamming. These pragmas can only be applied to iterative for loops.
Tells the compiler that the loop should be vectorized according to the argument keywords.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.