[NFC][AIX][XCOFF] change function name from getNumofGPRsSaved to getNumOfGPRsSaved

[jasonliu]

LGTM.

llvm/include/llvm/Object/XCOFFObjectFile.h

public:
   bool isLRSaved() const;
 
   bool isBackChainStored() const;
   bool isFixup() const;
   uint8_t getNumOfFPRsSaved() const;
 
   bool hasVectorInfo() const;
   bool hasExtensionTable() const;
-  uint8_t getNumofGPRsSaved() const;
+  uint8_t getNumOfGPRsSaved() const;
 
   uint8_t getNumberOfFixedParms() const;
 
   uint8_t getNumberOfFPParms() const;
   bool hasParmsOnStack() const;
 
   const Optional<SmallString<32>> &getParmsType() const { return ParmsType; }
   const Optional<uint32_t> &getTraceBackTableOffset() const {

llvm/lib/Object/XCOFFObjectFile.cpp

 bool XCOFFTracebackTable::hasExtensionTable() const {
   return GETBITWITHMASK(4, HasExtensionTableMask);
 }
 
 bool XCOFFTracebackTable::hasVectorInfo() const {
   return GETBITWITHMASK(4, HasVectorInfoMask);
 }
 
-uint8_t XCOFFTracebackTable::getNumofGPRsSaved() const {
+uint8_t XCOFFTracebackTable::getNumOfGPRsSaved() const {
   return GETBITWITHMASKSHIFT(4, GPRSavedMask, GPRSavedShift);
 }
 
 uint8_t XCOFFTracebackTable::getNumberOfFixedParms() const {
   return GETBITWITHMASKSHIFT(4, NumberOfFixedParmsMask,
                              NumberOfFixedParmsShift);
 }
 

llvm/unittests/Object/XCOFFObjectFileTest.cpp

TEST(XCOFFObjectFileTest, XCOFFTracebackTableAPIGeneral) {
   EXPECT_FALSE(TT.isLRSaved());
 
   EXPECT_TRUE(TT.isBackChainStored());
   EXPECT_FALSE(TT.isFixup());
   EXPECT_EQ(TT.getNumOfFPRsSaved(), 0);
 
   EXPECT_FALSE(TT.hasExtensionTable());
   EXPECT_FALSE(TT.hasVectorInfo());
-  EXPECT_EQ(TT.getNumofGPRsSaved(), 0);
+  EXPECT_EQ(TT.getNumOfGPRsSaved(), 0);
 
   EXPECT_EQ(TT.getNumberOfFixedParms(), 1);
 
   EXPECT_EQ(TT.getNumberOfFPParms(), 2);
   EXPECT_TRUE(TT.hasParmsOnStack());
 
   ASSERT_TRUE(TT.getParmsType());
   EXPECT_EQ(TT.getParmsType().getValue(), "i, f, d");