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| author | John Brawn <john.brawn@arm.com> | 2024-06-07 10:38:23 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-06-07 10:38:23 +0100 |
| commit | 1721c14e8e0d75cc611067b6f4e84028ea7c47d5 (patch) | |
| tree | 36e3b7daa4327c02b7a0352310532c59ef258829 /llvm/lib/IR/DebugInfoMetadata.cpp | |
| parent | 0d1b3671a91c3929fc3e3613491ff4b57f1adcc3 (diff) | |
| download | llvm-1721c14e8e0d75cc611067b6f4e84028ea7c47d5.zip llvm-1721c14e8e0d75cc611067b6f4e84028ea7c47d5.tar.gz llvm-1721c14e8e0d75cc611067b6f4e84028ea7c47d5.tar.bz2 | |
[DebugInfo] Add DW_OP_LLVM_extract_bits (#93990)
This operation extracts a number of bits at a given offset and sign or
zero extends them, which is done by emitting it as a left shift followed
by a right shift.
This is being added for use in clang for C++ structured bindings of
bitfields that have offset or size that aren't a byte multiple. A new
operation is being added, instead of shifts being used directly, as it
makes correctly handling it in optimisations (which will be done in a
later patch) much easier.
Diffstat (limited to 'llvm/lib/IR/DebugInfoMetadata.cpp')
| -rw-r--r-- | llvm/lib/IR/DebugInfoMetadata.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/IR/DebugInfoMetadata.cpp b/llvm/lib/IR/DebugInfoMetadata.cpp index 9bd1d78..2b45932 100644 --- a/llvm/lib/IR/DebugInfoMetadata.cpp +++ b/llvm/lib/IR/DebugInfoMetadata.cpp @@ -1404,6 +1404,8 @@ unsigned DIExpression::ExprOperand::getSize() const { switch (Op) { case dwarf::DW_OP_LLVM_convert: case dwarf::DW_OP_LLVM_fragment: + case dwarf::DW_OP_LLVM_extract_bits_sext: + case dwarf::DW_OP_LLVM_extract_bits_zext: case dwarf::DW_OP_bregx: return 3; case dwarf::DW_OP_constu: @@ -1474,6 +1476,8 @@ bool DIExpression::isValid() const { case dwarf::DW_OP_LLVM_convert: case dwarf::DW_OP_LLVM_arg: case dwarf::DW_OP_LLVM_tag_offset: + case dwarf::DW_OP_LLVM_extract_bits_sext: + case dwarf::DW_OP_LLVM_extract_bits_zext: case dwarf::DW_OP_constu: case dwarf::DW_OP_plus_uconst: case dwarf::DW_OP_plus: |