[Doc] Allow llvm.ptr.annotation to specify decorations #2406
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For example it allows to translate
@.str.0 = private unnamed_addr addrspace(1) constant [13 x i8]
c"{44:\224\22}\00", section "llvm.metadata"
...
%ptr = alloca i32
%ann_ptr = call ptr @llvm.ptr.annotation.p4.p1(ptr %ptr, ptr
addrspace(1) @.str.0, ptr addrspace(1) @.str.1)
into OpDecorate Alignment 4
Signed-off-by: Sidorov, Dmitry <dmitry.sidorov@intel.com>
vmaksimo
approved these changes
Mar 20, 2024
asudarsa
reviewed
Mar 24, 2024
| In cases when decoration parameter carried by ``llvm.ptr.annotation`` coalesces | ||
| with a value carried by another LLVM attribute, the translator is free to chose | ||
| the value depending on the meaning of the annotation. For example for alignment | ||
| we can chose the biggest alignment specified in LLVM IR: |
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Suggested change
| we can chose the biggest alignment specified in LLVM IR: | |
| we can choose the biggest alignment specified in LLVM IR: |
asudarsa
reviewed
Mar 24, 2024
| ``llvm.ptr.annotation`` LLVM IR intrinsic. Decorations and MemberDecorations | ||
| specified in ``llvm.ptr.annotation`` must be in the second argument and must | ||
| have the format ``{X}`` or ``{X:Y}`` where ``X`` is an integer literal | ||
| representing the SPIR-V decoration identifier and ``Y`` is 1 or more arguments |
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Suggested change
| representing the SPIR-V decoration identifier and ``Y`` is 1 or more arguments | |
| representing the SPIR-V decoration identifier and ``Y`` is a set of 1 or more arguments |
asudarsa
reviewed
Mar 24, 2024
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| Class members and instructions returning a pointer can be decorated using the | ||
| ``llvm.ptr.annotation`` LLVM IR intrinsic. Decorations and MemberDecorations | ||
| specified in ``llvm.ptr.annotation`` must be in the second argument and must |
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what does 'must be in the second argument' mean here? Please reword if necessary. Thanks
asudarsa
reviewed
Mar 24, 2024
| @@ -547,6 +547,22 @@ member decorations. | |||
| None of the special requirements imposed from using the reserved names apply to | |||
| using decoration identifiers directly. | |||
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| In cases when decoration parameter carried by ``llvm.ptr.annotation`` coalesces | |||
| with a value carried by another LLVM attribute, the translator is free to chose | |||
There was a problem hiding this comment.
Suggested change
| with a value carried by another LLVM attribute, the translator is free to chose | |
| with a value carried by another LLVM attribute, the translator is free to choose |
asudarsa
approved these changes
Mar 24, 2024
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For example it allows to translate
into OpDecorate Alignment 4