https://bugs.llvm.org/show_bug.cgi?id=52418
Bug ID: 52418
Summary: Incomplete support for `--target`in the code-gen layer
Product: flang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Driver
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected]
This came up during a discussion on https://reviews.llvm.org/D112961.
As per the comment at the top of
"flang/lib/Optimizer/CodeGen/DescriptorModel.h", various assumptions about the
target machine are made in the code-gen layer. This is likely to cause
`--target` (or e.g. `-m64` and `-m32`) to malfunction when using Flang's
interoperability with C (see how various CFI structures are lowered).
Note that `--target` is not available in the driver yet. Also, it is possible
that the assumptions made when lowering the CFI structures will affect other
parts of the code-gen too. However, I suspect that most things will work
correctly when generating code for the host/native target.
I'm creating this issue as a placeholder and as a note for our future selves.
This is currently _not_ being investigated or worked on.
-Andrzej
[1] https://github.com/flang-compiler/f18-llvm-project
[2] https://github.com/llvm/llvm-project
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