diff options
Diffstat (limited to 'llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp index 373d52fd1d4..91498133faf 100644 --- a/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp +++ b/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp @@ -861,7 +861,7 @@ bool CombinerHelper::optimizeMemmove(MachineInstr &MI, Register Dst, return true; } -bool CombinerHelper::tryCombineMemCpyFamily(MachineInstr &MI) { +bool CombinerHelper::tryCombineMemCpyFamily(MachineInstr &MI, unsigned MaxLen) { // This combine is fairly complex so it's not written with a separate // matcher function. assert(MI.getOpcode() == TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS); @@ -900,6 +900,9 @@ bool CombinerHelper::tryCombineMemCpyFamily(MachineInstr &MI) { return true; } + if (MaxLen && KnownLen > MaxLen) + return false; + if (ID == Intrinsic::memcpy) return optimizeMemcpy(MI, Dst, Src, KnownLen, DstAlign, SrcAlign, IsVolatile); if (ID == Intrinsic::memmove) |
