X86: Move a non-null assert to before the pointer is dereferenced

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285975 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp
index 33af73c5308cf43e33b6e214a7eb3c4f8068bb7d..c45646059594216989baedc927e431c1e1fb7241 100644 (file)
--- a/lib/Target/X86/X86RegisterInfo.cpp
+++ b/lib/Target/X86/X86RegisterInfo.cpp
@@ -264,13 +264,14 @@ X86RegisterInfo::getRegPressureLimit(const TargetRegisterClass *RC,
 
 const MCPhysReg *
 X86RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
+  assert(MF && "MachineFunction required");
+
   const X86Subtarget &Subtarget = MF->getSubtarget<X86Subtarget>();
   bool HasSSE = Subtarget.hasSSE1();
   bool HasAVX = Subtarget.hasAVX();
   bool HasAVX512 = Subtarget.hasAVX512();
   bool CallsEHReturn = MF->getMMI().callsEHReturn();
 
-  assert(MF && "MachineFunction required");
   switch (MF->getFunction()->getCallingConv()) {
   case CallingConv::GHC:
   case CallingConv::HiPE: