Hongbin Zheng via llvm-dev
2016-Sep-12 20:20 UTC
[llvm-dev] builtins name mangling in SPIR 2.0
Hi all,
According to the SPIR 2.0 spec[1], the name of OpenCL builtins are mangled.
However, when I compile OpenCl code with Clang 3.9 with the
"spir64-unknown-unknown" target, Clang generates IR without mangling
the
builtins, e.g. for:
__kernel void input_zip_int(__global int *in0) {
*in0 = get_global_id(0);
}
clang generates:
define spir_kernel void @input_zip_int(i32 addrspace(1)* nocapture %in0)
local_unnamed_addr #0 !kernel_arg_addr_space !3 !kernel_arg_access_qual !4
!kernel_arg_type !5 !kernel_arg_base_type !5 !kernel_arg_type_qual !6 {
entry:
%call = tail call spir_func i128 @get_global_id(i32 0) #2
%conv = trunc i128 %call to i32
store i32 %conv, i32 addrspace(1)* %in0, align 4, !tbaa !7
ret void
}
In this case, get_global_id is not mangled to _Z13get_global_idj according
to [2].
Is there an option for clang or an LLVM clang to do the mangling for spir
builtins?
Thanks
Hongbin
[1] https://www.khronos.org/registry/spir/specs/spir_spec-2.0.pdf, page 36
[2]
https://github.com/KhronosGroup/SPIR-Tools/wiki/SPIR-2.0-built-in-functions
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Liu, Yaxun (Sam) via llvm-dev
2016-Sep-12 20:42 UTC
[llvm-dev] builtins name mangling in SPIR 2.0
If you use the default header file under clang/lib/Headers/opencl-c.h,
get_global_id will be mangled.
If you want to declare get_global_id in your own header, add
__attribute__((overloadable)), then it will be mangled.
Sam
From: Hongbin Zheng [mailto:etherzhhb at gmail.com]
Sent: Monday, September 12, 2016 4:21 PM
To: cfe-dev at lists.llvm.org; llvm-dev <llvm-dev at lists.llvm.org>; Liu,
Yaxun (Sam) <Yaxun.Liu at amd.com>
Subject: builtins name mangling in SPIR 2.0
Hi all,
According to the SPIR 2.0 spec[1], the name of OpenCL builtins are mangled.
However, when I compile OpenCl code with Clang 3.9 with the
"spir64-unknown-unknown" target, Clang generates IR without mangling
the builtins, e.g. for:
__kernel void input_zip_int(__global int *in0) {
*in0 = get_global_id(0);
}
clang generates:
define spir_kernel void @input_zip_int(i32 addrspace(1)* nocapture %in0)
local_unnamed_addr #0 !kernel_arg_addr_space !3 !kernel_arg_access_qual !4
!kernel_arg_type !5 !kernel_arg_base_type !5 !kernel_arg_type_qual !6 {
entry:
%call = tail call spir_func i128 @get_global_id(i32 0) #2
%conv = trunc i128 %call to i32
store i32 %conv, i32 addrspace(1)* %in0, align 4, !tbaa !7
ret void
}
In this case, get_global_id is not mangled to _Z13get_global_idj according to
[2].
Is there an option for clang or an LLVM clang to do the mangling for spir
builtins?
Thanks
Hongbin
[1] https://www.khronos.org/registry/spir/specs/spir_spec-2.0.pdf, page 36
[2] https://github.com/KhronosGroup/SPIR-Tools/wiki/SPIR-2.0-built-in-functions
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Hongbin Zheng via llvm-dev
2016-Sep-12 20:43 UTC
[llvm-dev] builtins name mangling in SPIR 2.0
Thanks a lot. On Mon, Sep 12, 2016 at 1:42 PM, Liu, Yaxun (Sam) <Yaxun.Liu at amd.com> wrote:> If you use the default header file under clang/lib/Headers/opencl-c.h, > get_global_id will be mangled. > > > > If you want to declare get_global_id in your own header, add > __attribute__((overloadable)), then it will be mangled. > > > > Sam > > > > *From:* Hongbin Zheng [mailto:etherzhhb at gmail.com] > *Sent:* Monday, September 12, 2016 4:21 PM > *To:* cfe-dev at lists.llvm.org; llvm-dev <llvm-dev at lists.llvm.org>; Liu, > Yaxun (Sam) <Yaxun.Liu at amd.com> > *Subject:* builtins name mangling in SPIR 2.0 > > > > Hi all, > > > > According to the SPIR 2.0 spec[1], the name of OpenCL builtins are mangled. > > > > However, when I compile OpenCl code with Clang 3.9 with the > "spir64-unknown-unknown" target, Clang generates IR without mangling the > builtins, e.g. for: > > > > __kernel void input_zip_int(__global int *in0) { > > *in0 = get_global_id(0); > > } > > > > clang generates: > > > > define spir_kernel void @input_zip_int(i32 addrspace(1)* nocapture %in0) > local_unnamed_addr #0 !kernel_arg_addr_space !3 !kernel_arg_access_qual !4 > !kernel_arg_type !5 !kernel_arg_base_type !5 !kernel_arg_type_qual !6 { > > entry: > > %call = tail call spir_func i128 @get_global_id(i32 0) #2 > > %conv = trunc i128 %call to i32 > > store i32 %conv, i32 addrspace(1)* %in0, align 4, !tbaa !7 > > ret void > > } > > > > In this case, get_global_id is not mangled to _Z13get_global_idj according > to [2]. > > > > Is there an option for clang or an LLVM clang to do the mangling for spir > builtins? > > > > Thanks > > Hongbin > > > > > > [1] https://www.khronos.org/registry/spir/specs/spir_spec-2.0.pdf, page 36 > > [2] https://github.com/KhronosGroup/SPIR-Tools/wiki/ > SPIR-2.0-built-in-functions >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20160912/1550f861/attachment.html>