[clang] [compiler-rt] [llvm] [clang-tools-extra] [flang] [PowerPC][CodeGen] Exploit STMW and LMW in 32-bit big-endian mode. (PR #74415)

[Qiu Chaofan via cfe-commits]

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@@ -1676,6 +1676,10 @@ PPCRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
   bool noImmForm = !MI.isInlineAsm() && OpC != TargetOpcode::STACKMAP &&
                    OpC != TargetOpcode::PATCHPOINT && !ImmToIdxMap.count(OpC);
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ecnelises wrote:

`... && OpC != PPC::STMW && OpC != PPC::LMW`?

https://github.com/llvm/llvm-project/pull/74415