http://llvm.org/bugs/show_bug.cgi?id=9166
Summary: Code generated for function returning struct
incompatible with native ABI
Product: libraries
Version: trunk
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
The Win32 native compiler, VC, generates a call to a function returning a
struct in the following manner:
1. The caller allocates a buffer which will be filled by the caller with the
return value
2. Before calling, the caller pushes the address of this buffer on the stack
3. Unlike other targets, such as Linux32, the callee does not pop the address
before returning
Currently, the Win32 target does not follow the above rules. This becomes an
issue when native-compiled and LLVM-compiled codes are mixed.
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