https://bugs.llvm.org/show_bug.cgi?id=39556
Bug ID: 39556
Summary: powerpc port lacks -mmultiple / -mno-multiple
Product: new-bugs
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: j...@jms.id.au
CC: llvm-bugs@lists.llvm.org
When compiling the Linux kernel, ppc32be platforms will enable the -mmutliple
flag. From the GCC man page:
-mno-multiple
Generate code that uses (does not use) the load multiple word instructions
and
the store multiple word instructions. These instructions are generated by
default on POWER systems, and not generated on PowerPC systems. Do not use
-mmultiple on little-endian PowerPC systems, since those instructions do
not work
when the processor is in little-endian mode. The exceptions are PPC740 and
PPC750 which permit these instructions in little-endian mode.
For feature parity it would be good if Clang supported this option.
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