http://llvm.org/bugs/show_bug.cgi?id=2984
Summary: Thumb target should use register scavenger
Product: libraries
Version: trunk
Platform: All
OS/Version: All
Status: NEW
Severity: major
Priority: P2
Component: Backend: ARM
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
CC: [email protected]
Currently the Thumb target reserves r3. It is not available for general
register allocation but is only used to materialize stack offsets. See
ARMRegisterInfo.cpp.
We should teach it to use the register scavenger to get a register to
materialize stack offset instead (same as ARM target). This is a critical step
towards making it a first class target.
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