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powerpc port lacks -mmultiple / -mno-multiple #38904

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shenki mannequin opened this issue Nov 5, 2018 · 0 comments
Open

powerpc port lacks -mmultiple / -mno-multiple #38904

shenki mannequin opened this issue Nov 5, 2018 · 0 comments
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Mannequin

shenki mannequin commented Nov 5, 2018

Bugzilla Link 39556
Version trunk
OS Linux
CC @hfinkel,@nickdesaulniers

Extended Description

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.

@llvmbot llvmbot transferred this issue from llvm/llvm-bugzilla-archive Dec 10, 2021
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