friss added inline comments.
================
Comment at: lldb/test/Shell/SymbolFile/DWARF/valueobject-pass-by-reg.s:14-40
+# typedef union
+# {
+# unsigned raw;
+# struct
+# {
+# unsigned a : 8;
+# unsigned b : 8;
----------------
This gives a much more compact debug info section:
```
typedef union {
unsigned raw;
struct {
unsigned a : 8;
unsigned b : 8;
unsigned c : 6;
unsigned d : 2;
unsigned e : 6;
unsigned f : 2;
};
} U;
// This appears first in the debug info and pulls the type definition in...
static U __attribute__((used)) _type_anchor;
// ... then our useful variable appears last in the debug info and we can
// tweak the assembly without needing to edit a lot of offsets by hand.
static U ug;
extern void f(U);
// Omit debug info for main.
__attribute__((nodebug))
int main() {
ug.raw = 0x64A40101;
f(ug);
f((U)ug.raw);
}
```
You can easily edit out the TEXT section, the line table and the accelerator
tables and patch the location expression to give you a minimal binary.
================
Comment at: lldb/test/Shell/SymbolFile/DWARF/valueobject-pass-by-reg.s:62-63
+
+ .section __TEXT,__text,regular,pure_instructions
+ .build_version macos, 10, 15 sdk_version 10, 15, 6
+ .file 1 "/tmp" "weird.c"
----------------
I don't think you need the TEXT segment at all, or at least you can make it
empty.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D85376/new/
https://reviews.llvm.org/D85376
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