Fix typo in comments

Reviewed By: MaskRay, jsji

Differential Revision: https://reviews.llvm.org/D108857

Author: apivovarov

llvm/include/llvm/DebugInfo/CodeView/CodeViewRegisters.def

@@ -373,7 +373,7 @@ CV_REGISTER(AMD64_K7, 765)
 
 CV_REGISTER(ARM_NOREG, 0)
 
-// General purpose 32-bit integer regisers
+// General purpose 32-bit integer registers
 
 CV_REGISTER(ARM_R0, 10)
 CV_REGISTER(ARM_R1, 11)

llvm/include/llvm/Target/TargetOptions.h

@@ -174,7 +174,7 @@ namespace llvm {
 
     /// EnableAIXExtendedAltivecABI - This flag returns true when -vec-extabi is
     /// specified. The code generator is then able to use both volatile and
-    /// nonvolitle vector regisers. When false, the code generator only uses
+    /// nonvolitle vector registers. When false, the code generator only uses
     /// volatile vector registers which is the default setting on AIX.
     unsigned EnableAIXExtendedAltivecABI : 1;
 

llvm/lib/Target/PowerPC/PPCInstrInfo.cpp

@@ -3010,7 +3010,7 @@ bool PPCInstrInfo::expandPostRAPseudo(MachineInstr &MI) const {
             .addReg(SrcVSR + VecNo)
             .addReg(SrcVSR + VecNo);
     }
-    // BUILD_UACC is expanded to 4 copies of the underlying vsx regisers.
+    // BUILD_UACC is expanded to 4 copies of the underlying vsx registers.
     // So after building the 4 copies, we can replace the BUILD_UACC instruction
     // with a NOP.
     LLVM_FALLTHROUGH;