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wenju-hewenju-he
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[libclc] Add __attribute__((const)) to functions that don't access memory (#152456)
Before this PR, PostOrderFunctionAttrsPass in opt run can deduce memory(none) for these functions. This PR explicitly adds the attribute to align with Clang's OpenCL headers and ensures the attribute is present throughout the compilation flow. Generated bitcode files amdgcn--amdhsa.bc and nvptx64--nvidiacl.bc become slightly smaller.
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‎libclc/clc/include/clc/clcfunc.h

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#define _CLC_OVERLOAD __attribute__((overloadable))
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#define _CLC_DECL
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#define _CLC_INLINE __attribute__((always_inline)) inline
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#define _CLC_CONST __attribute__((const))
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// avoid inlines for SPIR-V related targets since we'll optimise later in the
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// chain

‎libclc/clc/include/clc/common/clc_smoothstep.inc

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//
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//===----------------------------------------------------------------------===//
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_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE __clc_smoothstep(__CLC_GENTYPE edge0,
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__CLC_GENTYPE edge1,
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__CLC_GENTYPE x);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL __CLC_GENTYPE
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__clc_smoothstep(__CLC_GENTYPE edge0, __CLC_GENTYPE edge1, __CLC_GENTYPE x);

‎libclc/clc/include/clc/geometric/binary_decl.inc

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#if (__CLC_VECSIZE_OR_1 == 1 || __CLC_VECSIZE_OR_1 == 2 || \
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__CLC_VECSIZE_OR_1 == 3 || __CLC_VECSIZE_OR_1 == 4)
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_CLC_OVERLOAD _CLC_DECL __CLC_SCALAR_GENTYPE FUNCTION(__CLC_GENTYPE a,
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__CLC_GENTYPE b);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL __CLC_SCALAR_GENTYPE
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FUNCTION(__CLC_GENTYPE a, __CLC_GENTYPE b);
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#endif

‎libclc/clc/include/clc/geometric/clc_cross.h

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#include <clc/internal/clc.h>
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_CLC_OVERLOAD _CLC_DECL float3 __clc_cross(float3 p0, float3 p1);
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_CLC_OVERLOAD _CLC_DECL float4 __clc_cross(float4 p0, float4 p1);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL float3 __clc_cross(float3 p0, float3 p1);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL float4 __clc_cross(float4 p0, float4 p1);
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#ifdef cl_khr_fp64
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#pragma OPENCL EXTENSION cl_khr_fp64 : enable
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_CLC_OVERLOAD _CLC_DECL double3 __clc_cross(double3 p0, double3 p1);
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_CLC_OVERLOAD _CLC_DECL double4 __clc_cross(double4 p0, double4 p1);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL double3 __clc_cross(double3 p0, double3 p1);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL double4 __clc_cross(double4 p0, double4 p1);
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#endif
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#ifdef cl_khr_fp16
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#pragma OPENCL EXTENSION cl_khr_fp16 : enable
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_CLC_OVERLOAD _CLC_DECL half3 __clc_cross(half3 p0, half3 p1);
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_CLC_OVERLOAD _CLC_DECL half4 __clc_cross(half4 p0, half4 p1);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL half3 __clc_cross(half3 p0, half3 p1);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL half4 __clc_cross(half4 p0, half4 p1);
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#endif
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‎libclc/clc/include/clc/geometric/unary_decl.inc

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#if (__CLC_VECSIZE_OR_1 == 1 || __CLC_VECSIZE_OR_1 == 2 || \
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__CLC_VECSIZE_OR_1 == 3 || __CLC_VECSIZE_OR_1 == 4)
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_CLC_OVERLOAD _CLC_DECL
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL
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#ifdef __CLC_GEOMETRIC_RET_GENTYPE
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__CLC_GENTYPE
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#else

‎libclc/clc/include/clc/integer/clc_abs.inc

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//
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//===----------------------------------------------------------------------===//
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_CLC_OVERLOAD _CLC_DECL __CLC_U_GENTYPE __clc_abs(__CLC_GENTYPE x);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL __CLC_U_GENTYPE __clc_abs(__CLC_GENTYPE x);

‎libclc/clc/include/clc/integer/clc_abs_diff.inc

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//
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//===----------------------------------------------------------------------===//
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_CLC_OVERLOAD _CLC_DECL __CLC_U_GENTYPE __clc_abs_diff(__CLC_GENTYPE x,
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__CLC_GENTYPE y);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL __CLC_U_GENTYPE
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__clc_abs_diff(__CLC_GENTYPE x, __CLC_GENTYPE y);

‎libclc/clc/include/clc/integer/clc_bitfield_extract_decl.inc

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//
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//===----------------------------------------------------------------------===//
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_CLC_OVERLOAD _CLC_DECL __RETTYPE FUNCTION(__CLC_GENTYPE base, uint offset,
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uint count);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL __RETTYPE FUNCTION(__CLC_GENTYPE base,
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uint offset, uint count);

‎libclc/clc/include/clc/integer/clc_bitfield_insert.inc

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//
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//===----------------------------------------------------------------------===//
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_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE FUNCTION(__CLC_GENTYPE base,
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__CLC_GENTYPE insert,
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uint offset, uint count);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL __CLC_GENTYPE FUNCTION(__CLC_GENTYPE base,
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__CLC_GENTYPE insert,
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uint offset,
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uint count);

‎libclc/clc/include/clc/math/binary_decl_with_scalar_second_arg.inc

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//
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//===----------------------------------------------------------------------===//
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_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE FUNCTION(__CLC_GENTYPE a,
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__CLC_GENTYPE b);
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_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE FUNCTION(__CLC_GENTYPE a,
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__CLC_SCALAR_GENTYPE b);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL __CLC_GENTYPE FUNCTION(__CLC_GENTYPE a,
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__CLC_GENTYPE b);
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_CLC_OVERLOAD _CLC_CONST _CLC_DECL __CLC_GENTYPE
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FUNCTION(__CLC_GENTYPE a, __CLC_SCALAR_GENTYPE b);

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