Ooops, don't forget to clear this. The real inner loop is now:

.LBB_foo_3:     ; no_exit.1
        lfd f2, 0(r9)
        lfd f3, 8(r9)
        fmul f4, f1, f2
        fmadd f4, f0, f3, f4
        stfd f4, 8(r9)
        fmul f3, f1, f3
        fmsub f2, f0, f2, f3
        stfd f2, 0(r9)
        addi r9, r9, 16
        addi r8, r8, 1
        cmpw cr0, r8, r4
        ble .LBB_foo_3  ; no_exit.1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22782 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/LoopStrengthReduce.cpp

@@ -690,6 +690,7 @@ RemoveCommonExpressionsFromUseBases(std::vector<BasedUser> &Uses) {
       Uses[i].Base = Zero;
     else
       Uses[i].Base = SCEVAddExpr::get(SubExprs);
+    SubExprs.clear();
   }
  
   return Result;