diff --git a/llvm/lib/Transforms/Scalar/DivRemPairs.cpp b/llvm/lib/Transforms/Scalar/DivRemPairs.cpp
--- a/llvm/lib/Transforms/Scalar/DivRemPairs.cpp
+++ b/llvm/lib/Transforms/Scalar/DivRemPairs.cpp
@@ -238,8 +238,43 @@
     if (!DivDominates && !DT.dominates(RemInst, DivInst)) {
       // We have matching div-rem pair, but they are in two different blocks,
       // neither of which dominates one another.
-      // FIXME: We could hoist both ops to the common predecessor block?
-      continue;
+
+      BasicBlock *PredBB = nullptr;
+
+      // Look for something like this
+      // PredBB
+      //   |  \
+      //   |  Rem
+      //   |  /
+      //  Div
+      //
+      // If the Rem block has a single predecessor and successor, and all paths
+      // from PredBB go to either Rem or Div, we can hoist Div to PredBB. If
+      // we have a DivRemOp we can also hoist Rem. Otherwise we'll leave
+      // Rem where it is and rewrite it to mul/sub.
+      // Only do this if the div and rem are at the beginning of their basic
+      // blocks.
+      // FIXME: We could use isGuaranteedToTransferExecutionToSuccessor to avoid
+      // the beginning of basic block check.
+      // FIXME: We could handle more cases hoisting cases?
+      if (RemInst->getParent()->getFirstNonPHIOrDbg() == RemInst &&
+          DivInst->getParent()->getFirstNonPHIOrDbg() == DivInst &&
+          RemInst->getParent()->getSingleSuccessor() == DivInst->getParent())
+        PredBB = RemInst->getParent()->getSinglePredecessor();
+
+      // Make sure all paths from PredBB go to either the RemBB or the DivBB.
+      if (PredBB && llvm::all_of(successors(PredBB), [&](BasicBlock *BB) {
+                         return BB == DivInst->getParent() ||
+                                BB == RemInst->getParent(); })) {
+        DivDominates = true;
+        DivInst->moveBefore(PredBB->getTerminator());
+        if (HasDivRemOp) {
+          RemInst->moveBefore(PredBB->getTerminator());
+          Changed = true;
+          continue;
+        }
+      } else
+        continue;
     }
 
     // The target does not have a single div/rem operation,
diff --git a/llvm/test/Transforms/DivRemPairs/X86/div-expanded-rem-pair.ll b/llvm/test/Transforms/DivRemPairs/X86/div-expanded-rem-pair.ll
--- a/llvm/test/Transforms/DivRemPairs/X86/div-expanded-rem-pair.ll
+++ b/llvm/test/Transforms/DivRemPairs/X86/div-expanded-rem-pair.ll
@@ -204,3 +204,60 @@
   %ret = phi i32 [ %t2, %if.then ], [ %t3, %if.else ]
   ret i32 %ret
 }
+
+define i64 @remainder_triangle_i64(i64 %a, i64 %b, i64* %rp) {
+; CHECK-LABEL: @remainder_triangle_i64(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i64* [[RP:%.*]], null
+; CHECK-NEXT:    [[DIV:%.*]] = udiv i64 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT:    [[REM:%.*]] = urem i64 [[A]], [[B]]
+; CHECK-NEXT:    br i1 [[CMP]], label [[IF_THEN:%.*]], label [[END:%.*]]
+; CHECK:       if.then:
+; CHECK-NEXT:    store i64 [[REM]], i64* [[RP]], align 4
+; CHECK-NEXT:    br label [[END]]
+; CHECK:       end:
+; CHECK-NEXT:    ret i64 [[DIV]]
+;
+entry:
+  %cmp = icmp ne i64* %rp, null
+  br i1 %cmp, label %if.then, label %end
+
+if.then:
+  %rem = urem i64 %a, %b
+  store i64 %rem, i64* %rp
+  br label %end
+
+end:
+  %div = udiv i64 %a, %b
+  ret i64 %div
+}
+
+define i128 @remainder_triangle_i128(i128 %a, i128 %b, i128* %rp) {
+; CHECK-LABEL: @remainder_triangle_i128(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i128* [[RP:%.*]], null
+; CHECK-NEXT:    [[A_FROZEN:%.*]] = freeze i128 [[A:%.*]]
+; CHECK-NEXT:    [[B_FROZEN:%.*]] = freeze i128 [[B:%.*]]
+; CHECK-NEXT:    [[DIV:%.*]] = udiv i128 [[A_FROZEN]], [[B_FROZEN]]
+; CHECK-NEXT:    br i1 [[CMP]], label [[IF_THEN:%.*]], label [[END:%.*]]
+; CHECK:       if.then:
+; CHECK-NEXT:    [[TMP0:%.*]] = mul i128 [[DIV]], [[B_FROZEN]]
+; CHECK-NEXT:    [[REM_DECOMPOSED:%.*]] = sub i128 [[A_FROZEN]], [[TMP0]]
+; CHECK-NEXT:    store i128 [[REM_DECOMPOSED]], i128* [[RP]], align 4
+; CHECK-NEXT:    br label [[END]]
+; CHECK:       end:
+; CHECK-NEXT:    ret i128 [[DIV]]
+;
+entry:
+  %cmp = icmp ne i128* %rp, null
+  br i1 %cmp, label %if.then, label %end
+
+if.then:
+  %rem = urem i128 %a, %b
+  store i128 %rem, i128* %rp
+  br label %end
+
+end:
+  %div = udiv i128 %a, %b
+  ret i128 %div
+}