fixed a few typos in comments

llvm-svn: 211634

2 files changed, 12 insertions, 14 deletions

diff --git a/llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp b/llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp
index 822636fcf13..3e0f7404dd7 100644
--- a/llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp
+++ b/llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp
@@ -146,8 +146,8 @@ static const SDep *CriticalPathStep(const SUnit *SU) {
 
 void CriticalAntiDepBreaker::PrescanInstruction(MachineInstr *MI) {
   // It's not safe to change register allocation for source operands of
-  // that have special allocation requirements. Also assume all registers
-  // used in a call must not be changed (ABI).
+  // instructions that have special allocation requirements. Also assume all
+  // registers used in a call must not be changed (ABI).
   // FIXME: The issue with predicated instruction is more complex. We are being
   // conservative here because the kill markers cannot be trusted after
   // if-conversion:
@@ -309,7 +309,7 @@ void CriticalAntiDepBreaker::ScanInstruction(MachineInstr *MI,
 // the two-address instruction also defines NewReg, as may happen with
 // pre/postincrement loads. In this case, both the use and def operands are in
 // RegRefs because the def is inserted by PrescanInstruction and not erased
-// during ScanInstruction. So checking for an instructions with definitions of
+// during ScanInstruction. So checking for an instruction with definitions of
 // both NewReg and AntiDepReg covers it.
 bool
 CriticalAntiDepBreaker::isNewRegClobberedByRefs(RegRefIter RegRefBegin,
@@ -325,7 +325,7 @@ CriticalAntiDepBreaker::isNewRegClobberedByRefs(RegRefIter RegRefBegin,
     if (RefOper->isDef() && RefOper->isEarlyClobber())
       return true;
 
-    // Handle cases in which this instructions defines NewReg.
+    // Handle cases in which this instruction defines NewReg.
     MachineInstr *MI = RefOper->getParent();
     for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
       const MachineOperand &CheckOper = MI->getOperand(i);
@@ -343,11 +343,11 @@ CriticalAntiDepBreaker::isNewRegClobberedByRefs(RegRefIter RegRefBegin,
         return true;
 
       // Don't allow an instruction using AntiDepReg to be earlyclobbered by
-      // NewReg
+      // NewReg.
       if (CheckOper.isEarlyClobber())
         return true;
 
-      // Don't allow inline asm to define NewReg at all. Who know what it's
+      // Don't allow inline asm to define NewReg at all. Who knows what it's
       // doing with it.
       if (MI->isInlineAsm())
         return true;
@@ -494,8 +494,7 @@ BreakAntiDependencies(const std::vector<SUnit>& SUnits,
   // as we go to help determine which registers are available.
   unsigned Broken = 0;
   unsigned Count = InsertPosIndex - 1;
-  for (MachineBasicBlock::iterator I = End, E = Begin;
-       I != E; --Count) {
+  for (MachineBasicBlock::iterator I = End, E = Begin; I != E; --Count) {
     MachineInstr *MI = --I;
     if (MI->isDebugValue())
       continue;
@@ -526,7 +525,7 @@ BreakAntiDependencies(const std::vector<SUnit>& SUnits,
             // Don't break anti-dependencies on non-allocatable registers.
             AntiDepReg = 0;
           else if (KeepRegs.test(AntiDepReg))
-            // Don't break anti-dependencies if an use down below requires
+            // Don't break anti-dependencies if a use down below requires
             // this exact register.
             AntiDepReg = 0;
           else {
@@ -564,8 +563,7 @@ BreakAntiDependencies(const std::vector<SUnit>& SUnits,
     // If MI's defs have a special allocation requirement, don't allow
     // any def registers to be changed. Also assume all registers
     // defined in a call must not be changed (ABI).
-    if (MI->isCall() || MI->hasExtraDefRegAllocReq() ||
-        TII->isPredicated(MI))
+    if (MI->isCall() || MI->hasExtraDefRegAllocReq() || TII->isPredicated(MI))
       // If this instruction's defs have special allocation requirement, don't
       // break this anti-dependency.
       AntiDepReg = 0;
diff --git a/llvm/lib/CodeGen/CriticalAntiDepBreaker.h b/llvm/lib/CodeGen/CriticalAntiDepBreaker.h
index 1949a48d98f..45e4ff5c78b 100644
--- a/llvm/lib/CodeGen/CriticalAntiDepBreaker.h
+++ b/llvm/lib/CodeGen/CriticalAntiDepBreaker.h
@@ -55,12 +55,12 @@ class TargetRegisterInfo;
     typedef std::multimap<unsigned, MachineOperand *>::const_iterator
       RegRefIter;
 
-    /// KillIndices - The index of the most recent kill (proceding bottom-up),
+    /// KillIndices - The index of the most recent kill (proceeding bottom-up),
     /// or ~0u if the register is not live.
     std::vector<unsigned> KillIndices;
 
-    /// DefIndices - The index of the most recent complete def (proceding bottom
-    /// up), or ~0u if the register is live.
+    /// DefIndices - The index of the most recent complete def (proceeding
+    /// bottom up), or ~0u if the register is live.
     std::vector<unsigned> DefIndices;
 
     /// KeepRegs - A set of registers which are live and cannot be changed to