https://bugs.llvm.org/show_bug.cgi?id=38224
Bug ID: 38224
Summary: Remove register allocator bug workaround
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: AVR
Assignee: unassignedb...@nondot.org
Reporter: m...@dylanmckay.io
CC: llvm-bugs@lists.llvm.org
The register allocator does not handle certain functions that use the
'LDDWRdPtrQ' instructions which have high register pressure.
The error message is:
LLVM ERROR: ran out of registers during register allocation
In order to work around this, we restricted the allowable registers of
LDDWRdPtrQ to disallow Z.
First noticed in https://github.com/avr-rust/rust/issues/37
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