[PATCH] D51148: [RISCV] Fix std::advance slowness

[Ana Pazos via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL340669:  [RISCV] Fix std::advance slowness (authored by apazos, committed by ).
Herald added a subscriber: jrtc27.

Changed prior to commit:
  https://reviews.llvm.org/D51148?vs=162494&id=162496#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D51148

Files:
  llvm/trunk/lib/Target/RISCV/RISCVFrameLowering.cpp


Index: llvm/trunk/lib/Target/RISCV/RISCVFrameLowering.cpp
===================================================================
--- llvm/trunk/lib/Target/RISCV/RISCVFrameLowering.cpp
+++ llvm/trunk/lib/Target/RISCV/RISCVFrameLowering.cpp
@@ -148,8 +148,7 @@
   // Skip to before the restores of callee-saved registers
   // FIXME: assumes exactly one instruction is used to restore each
   // callee-saved register.
-  MachineBasicBlock::iterator LastFrameDestroy = MBBI;
-  std::advance(LastFrameDestroy, -MFI.getCalleeSavedInfo().size());
+  auto LastFrameDestroy = std::prev(MBBI, MFI.getCalleeSavedInfo().size());
 
   uint64_t StackSize = MFI.getStackSize();
 


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