Remove the remaining uses of abs64 and nuke it.

std::abs works just fine and we're already using it in many places. NFC intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231696 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/MathExtras.h

@@ -604,13 +604,6 @@ inline uint64_t OffsetToAlignment(uint64_t Value, uint64_t Align) {
   return RoundUpToAlignment(Value, Align) - Value;
 }
 
-/// abs64 - absolute value of a 64-bit int.  Not all environments support
-/// "abs" on whatever their name for the 64-bit int type is.  The absolute
-/// value of the largest negative number is undefined, as with "abs".
-inline int64_t abs64(int64_t x) {
-  return (x < 0) ? -x : x;
-}
-
 /// SignExtend32 - Sign extend B-bit number x to 32-bit int.
 /// Usage int32_t r = SignExtend32<5>(x);
 template <unsigned B> inline int32_t SignExtend32(uint32_t x) {

lib/Target/ARM/ARMISelLowering.cpp

@@ -10310,9 +10310,9 @@ bool ARMTargetLowering::isLegalAddressingMode(const AddrMode &AM,
 bool ARMTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
   // Thumb2 and ARM modes can use cmn for negative immediates.
   if (!Subtarget->isThumb())
-    return ARM_AM::getSOImmVal(llvm::abs64(Imm)) != -1;
+    return ARM_AM::getSOImmVal(std::abs(Imm)) != -1;
   if (Subtarget->isThumb2())
-    return ARM_AM::getT2SOImmVal(llvm::abs64(Imm)) != -1;
+    return ARM_AM::getT2SOImmVal(std::abs(Imm)) != -1;
   // Thumb1 doesn't have cmn, and only 8-bit immediates.
   return Imm >= 0 && Imm <= 255;
 }
@@ -10323,7 +10323,7 @@ bool ARMTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
 /// immediate into a register.
 bool ARMTargetLowering::isLegalAddImmediate(int64_t Imm) const {
   // Same encoding for add/sub, just flip the sign.
-  int64_t AbsImm = llvm::abs64(Imm);
+  int64_t AbsImm = std::abs(Imm);
   if (!Subtarget->isThumb())
     return ARM_AM::getSOImmVal(AbsImm) != -1;
   if (Subtarget->isThumb2())

lib/Target/Hexagon/HexagonHardwareLoops.cpp

@@ -690,7 +690,7 @@ CountValue *HexagonHardwareLoops::computeCount(MachineLoop *Loop,
 
   // If the induction variable bump is not a power of 2, quit.
   // Othwerise we'd need a general integer division.
-  if (!isPowerOf2_64(abs64(IVBump)))
+  if (!isPowerOf2_64(std::abs(IVBump)))
     return nullptr;
 
   MachineBasicBlock *PH = Loop->getLoopPreheader();

lib/Target/PowerPC/PPCLoopDataPrefetch.cpp

@@ -192,7 +192,7 @@ bool PPCLoopDataPrefetch::runOnLoop(Loop *L) {
         const SCEV *PtrDiff = SE->getMinusSCEV(LSCEVAddRec, K->second);
         if (const SCEVConstant *ConstPtrDiff =
             dyn_cast<SCEVConstant>(PtrDiff)) {
-          int64_t PD = abs64(ConstPtrDiff->getValue()->getSExtValue());
+          int64_t PD = std::abs(ConstPtrDiff->getValue()->getSExtValue());
           if (PD < (int64_t) CacheLineSize) {
             DupPref = true;
             break;

lib/Transforms/Scalar/AlignmentFromAssumptions.cpp

@@ -124,7 +124,7 @@ static unsigned getNewAlignmentDiff(const SCEV *DiffSCEV,
 
     // If the displacement is not an exact multiple, but the remainder is a
     // constant, then return this remainder (but only if it is a power of 2).
-    uint64_t DiffUnitsAbs = abs64(DiffUnits);
+    uint64_t DiffUnitsAbs = std::abs(DiffUnits);
     if (isPowerOf2_64(DiffUnitsAbs))
       return (unsigned) DiffUnitsAbs;
   }

lib/Transforms/Scalar/LoopStrengthReduce.cpp

@@ -3825,7 +3825,7 @@ void LSRInstance::GenerateCrossUseConstantOffsets() {
           if (C->getValue()->isNegative() !=
                 (NewF.BaseOffset < 0) &&
               (C->getValue()->getValue().abs() * APInt(BitWidth, F.Scale))
-                .ule(abs64(NewF.BaseOffset)))
+                .ule(std::abs(NewF.BaseOffset)))
             continue;
 
         // OK, looks good.
@@ -3856,7 +3856,7 @@ void LSRInstance::GenerateCrossUseConstantOffsets() {
                J != JE; ++J)
             if (const SCEVConstant *C = dyn_cast<SCEVConstant>(*J))
               if ((C->getValue()->getValue() + NewF.BaseOffset).abs().slt(
-                   abs64(NewF.BaseOffset)) &&
+                   std::abs(NewF.BaseOffset)) &&
                   (C->getValue()->getValue() +
                    NewF.BaseOffset).countTrailingZeros() >=
                    countTrailingZeros<uint64_t>(NewF.BaseOffset))

lib/Transforms/Vectorize/BBVectorize.cpp

@@ -649,11 +649,11 @@ namespace {
         if (VTy != VTy2 && Offset < 0) {
           int64_t VTy2TSS = (int64_t) DL->getTypeStoreSize(VTy2);
           OffsetInElmts = Offset/VTy2TSS;
-          return (abs64(Offset) % VTy2TSS) == 0;
+          return (std::abs(Offset) % VTy2TSS) == 0;
         }
 
         OffsetInElmts = Offset/VTyTSS;
-        return (abs64(Offset) % VTyTSS) == 0;
+        return (std::abs(Offset) % VTyTSS) == 0;
       }
 
       return false;
@@ -984,8 +984,8 @@ namespace {
       unsigned IAlignment, JAlignment, IAddressSpace, JAddressSpace;
       int64_t OffsetInElmts = 0;
       if (getPairPtrInfo(I, J, IPtr, JPtr, IAlignment, JAlignment,
-            IAddressSpace, JAddressSpace,
+                         IAddressSpace, JAddressSpace, OffsetInElmts) &&
-            OffsetInElmts) && abs64(OffsetInElmts) == 1) {
+          std::abs(OffsetInElmts) == 1) {
         FixedOrder = (int) OffsetInElmts;
         unsigned BottomAlignment = IAlignment;
         if (OffsetInElmts < 0) BottomAlignment = JAlignment;