CodeGen: Use handy new-fangled post-increment, NFC

Drive-by cleanup; I noticed this when reviewing the patch that became
r225466.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225468 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/CodeGenPrepare.cpp b/lib/CodeGen/CodeGenPrepare.cpp
index 7550df278e5d7cefe69a8dec2bc5b2ff1e6eb39c..daab43e7f535419367bf34add11030942ddf8637 100644 (file)
--- a/lib/CodeGen/CodeGenPrepare.cpp
+++ b/lib/CodeGen/CodeGenPrepare.cpp
@@ -4330,7 +4330,7 @@ bool CodeGenPrepare::PlaceDbgValues(Function &F) {
   for (BasicBlock &BB : F) {
     Instruction *PrevNonDbgInst = nullptr;
     for (BasicBlock::iterator BI = BB.begin(), BE = BB.end(); BI != BE;) {
-      Instruction *Insn = BI; ++BI;
+      Instruction *Insn = BI++;
       DbgValueInst *DVI = dyn_cast<DbgValueInst>(Insn);
       // Leave dbg.values that refer to an alloca alone. These
       // instrinsics describe the address of a variable (= the alloca)