forked from OSchip/llvm-project
00602ee7ef
This patch simplified IR generation for __builtin_btf_type_id().
For __builtin_btf_type_id(obj, flag), previously IR builtin
looks like
if (obj is a lvalue)
llvm.bpf.btf.type.id(obj.ptr, 1, flag) !type
else
llvm.bpf.btf.type.id(obj, 0, flag) !type
The purpose of the 2nd argument is to differentiate
__builtin_btf_type_id(obj, flag) where obj is a lvalue
vs.
__builtin_btf_type_id(obj.ptr, flag)
Note that obj or obj.ptr is never used by the backend
and the `obj` argument is only used to derive the type.
This code sequence is subject to potential llvm CSE when
- obj is the same .e.g., nullptr
- flag is the same
- metadata type is different, e.g., typedef of struct "s"
and strust "s".
In the above, we don't want CSE since their metadata is different.
This patch change IR builtin to
llvm.bpf.btf.type.id(seq_num, flag) !type
and seq_num is always increasing. This will prevent potential
llvm CSE.
Also report an error if the type name is empty for
remote relocation since remote relocation needs non-empty
type name to do relocation against vmlinux.
Differential Revision: https://reviews.llvm.org/D85174
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| .. | ||
| array-1d-char.ll | ||
| array-1d-int.ll | ||
| array-2d-int.ll | ||
| array-size-0.ll | ||
| array-typedef.ll | ||
| binary-format.ll | ||
| builtin-btf-type-id.ll | ||
| char-no-debuginfo.ll | ||
| char.ll | ||
| empty-btf.ll | ||
| enum-basic.ll | ||
| extern-builtin.ll | ||
| extern-func-arg.ll | ||
| extern-global-var.ll | ||
| extern-var-func-weak-section.ll | ||
| extern-var-func-weak.ll | ||
| extern-var-func.ll | ||
| extern-var-section.ll | ||
| extern-var-struct-weak.ll | ||
| extern-var-struct.ll | ||
| extern-var-weak-section.ll | ||
| filename.ll | ||
| func-func-ptr.ll | ||
| func-non-void.ll | ||
| func-source.ll | ||
| func-typedef.ll | ||
| func-unused-arg.ll | ||
| func-void.ll | ||
| fwd-no-define.ll | ||
| fwd-with-define.ll | ||
| global-var-inited.ll | ||
| global-var-sec-readonly.ll | ||
| global-var-sec.ll | ||
| int.ll | ||
| local-var-readonly-1.ll | ||
| local-var-readonly-2.ll | ||
| local-var.ll | ||
| longlong.ll | ||
| map-def-2.ll | ||
| map-def-3.ll | ||
| map-def.ll | ||
| pruning-const.ll | ||
| pruning-typedef.ll | ||
| ptr-const-void.ll | ||
| ptr-func-1.ll | ||
| ptr-func-2.ll | ||
| ptr-func-3.ll | ||
| ptr-int.ll | ||
| ptr-prune-type.ll | ||
| ptr-void.ll | ||
| ptr-volatile-const-void.ll | ||
| ptr-volatile-void.ll | ||
| restrict-ptr.ll | ||
| short.ll | ||
| static-func.ll | ||
| static-var-derived-type.ll | ||
| static-var-inited-sec.ll | ||
| static-var-inited.ll | ||
| static-var-readonly-sec.ll | ||
| static-var-readonly.ll | ||
| static-var-sec.ll | ||
| static-var-zerolen-array.ll | ||
| static-var.ll | ||
| struct-anon-2.ll | ||
| struct-anon.ll | ||
| struct-basic.ll | ||
| struct-bitfield-typedef.ll | ||
| struct-enum.ll | ||
| uchar.ll | ||
| uint.ll | ||
| ulonglong.ll | ||
| union-array-typedef.ll | ||
| ushort.ll | ||
| weak-global-2.ll | ||
| weak-global.ll | ||