Use llvm::stable_sort

While touching the code, simplify if feasible.

llvm-svn: 358996
diff --git a/llvm/lib/MC/MCDwarf.cpp b/llvm/lib/MC/MCDwarf.cpp
index e8edf6b..aae6fdf 100644
--- a/llvm/lib/MC/MCDwarf.cpp
+++ b/llvm/lib/MC/MCDwarf.cpp
@@ -1865,11 +1865,10 @@
   // but the Android libunwindstack rejects eh_frame sections where
   // an FDE refers to a CIE other than the closest previous CIE.
   std::vector<MCDwarfFrameInfo> FrameArrayX(FrameArray.begin(), FrameArray.end());
-  std::stable_sort(
-      FrameArrayX.begin(), FrameArrayX.end(),
-      [&](const MCDwarfFrameInfo &X, const MCDwarfFrameInfo &Y) -> bool {
-        return CIEKey(X) < CIEKey(Y);
-      });
+  llvm::stable_sort(FrameArrayX,
+                    [](const MCDwarfFrameInfo &X, const MCDwarfFrameInfo &Y) {
+                      return CIEKey(X) < CIEKey(Y);
+                    });
   for (auto I = FrameArrayX.begin(), E = FrameArrayX.end(); I != E;) {
     const MCDwarfFrameInfo &Frame = *I;
     ++I;
diff --git a/llvm/lib/MC/WasmObjectWriter.cpp b/llvm/lib/MC/WasmObjectWriter.cpp
index 2994772..dab5bb3 100644
--- a/llvm/lib/MC/WasmObjectWriter.cpp
+++ b/llvm/lib/MC/WasmObjectWriter.cpp
@@ -934,9 +934,8 @@
   // order, but for the code section we combine many MC sections into single
   // wasm section, and this order is determined by the order of Asm.Symbols()
   // not the sections order.
-  std::stable_sort(
-      Relocs.begin(), Relocs.end(),
-      [](const WasmRelocationEntry &A, const WasmRelocationEntry &B) {
+  llvm::stable_sort(
+      Relocs, [](const WasmRelocationEntry &A, const WasmRelocationEntry &B) {
         return (A.Offset + A.FixupSection->getSectionOffset()) <
                (B.Offset + B.FixupSection->getSectionOffset());
       });