http://llvm.org/bugs/show_bug.cgi?id=8040
Summary: ARM codegen generates incorrect code for byval
function arguments
Product: new-bugs
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
When byval attribute is specified for a function argument to pass aggregate
type by value, ARM codegen produces code which is not compliant with AAPCS.
(r0-r3 registers are not used and argument is always passed on stack)
It seems that clang is currently trying to workaround this by passing arguments
as arrays instead of using byval (TargetInfo.cpp
-ARMABIInfo::classifyArgumentType(QualType Ty), but this adds unnecessary
target dependencies to IR.
Would it be possible to add/fix byval support in ARM backend(s)?
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