diff options
Diffstat (limited to 'llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp b/llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp index bb79783..e6b8f2f 100644 --- a/llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp +++ b/llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp @@ -1027,6 +1027,18 @@ void ARMLoadStoreOpt::FormCandidates(const MemOpQueue &MemOps) { if (AssumeMisalignedLoadStores && !mayCombineMisaligned(*STI, *MI)) CanMergeToLSMulti = CanMergeToLSDouble = false; + // vldm / vstm limit are 32 for S variants, 16 for D variants. + unsigned Limit; + switch (Opcode) { + default: + Limit = UINT_MAX; + break; + case ARM::VLDRD: + case ARM::VSTRD: + Limit = 16; + break; + } + // Merge following instructions where possible. for (unsigned I = SIndex+1; I < EIndex; ++I, ++Count) { int NewOffset = MemOps[I].Offset; @@ -1036,6 +1048,8 @@ void ARMLoadStoreOpt::FormCandidates(const MemOpQueue &MemOps) { unsigned Reg = MO.getReg(); if (Reg == ARM::SP || Reg == ARM::PC) break; + if (Count == Limit) + break; // See if the current load/store may be part of a multi load/store. unsigned RegNum = MO.isUndef() ? std::numeric_limits<unsigned>::max() |