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[various] Remove or use variables which are unused but set.

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This is in preparation for the -Wunused-but-set-variable warning.

Differential Revision: https://reviews.llvm.org/D102942
This commit is contained in:
Michael Benfield 2021-06-01 14:48:42 -07:00 committed by George Burgess IV
parent f55aa7710b
commit f8d5955717
6 changed files with 5 additions and 11 deletions
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2
lib/Target/AArch64/GISel/AArch64PostSelectOptimize.cpp
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@ -180,7 +180,7 @@ bool AArch64PostSelectOptimize::runOnMachineFunction(MachineFunction &MF) {
bool Changed = false;
for (auto &BB : MF)
Changed |= optimizeNZCVDefs(BB);
return true;
return Changed;
}
char AArch64PostSelectOptimize::ID = 0;

2
lib/Target/ARM/ARMISelLowering.cpp
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@ -6861,12 +6861,10 @@ static SDValue isVMOVModifiedImm(uint64_t SplatBits, uint64_t SplatUndef,
return SDValue();
// NEON has a 64-bit VMOV splat where each byte is either 0 or 0xff.
uint64_t BitMask = 0xff;
uint64_t Val = 0;
unsigned ImmMask = 1;
Imm = 0;
for (int ByteNum = 0; ByteNum < 8; ++ByteNum) {
if (((SplatBits | SplatUndef) & BitMask) == BitMask) {
Val |= BitMask;
Imm |= ImmMask;
} else if ((SplatBits & BitMask) != 0) {
return SDValue();

4
lib/Target/ARM/ARMLowOverheadLoops.cpp
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@ -1227,7 +1227,7 @@ bool ARMLowOverheadLoops::ProcessLoop(MachineLoop *ML) {
if (LoLoop.Preheader)
LoLoop.Start = SearchForStart(LoLoop.Preheader);
else
return false;
return Changed;
// Find the low-overhead loop components and decide whether or not to fall
// back to a normal loop. Also look for a vctp instructions and decide
@ -1261,7 +1261,7 @@ bool ARMLowOverheadLoops::ProcessLoop(MachineLoop *ML) {
LLVM_DEBUG(LoLoop.dump());
if (!LoLoop.FoundAllComponents()) {
LLVM_DEBUG(dbgs() << "ARM Loops: Didn't find loop start, update, end\n");
return false;
return Changed;
}
assert(LoLoop.Start->getOpcode() != ARM::t2WhileLoopStart &&

2
lib/Target/PowerPC/PPCBranchSelector.cpp
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@ -415,5 +415,5 @@ bool PPCBSel::runOnMachineFunction(MachineFunction &Fn) {
}
BlockSizes.clear();
return true;
return EverMadeChange;
}

4
lib/Target/X86/X86FloatingPoint.cpp
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@ -1526,7 +1526,7 @@ void FPS::handleSpecialFP(MachineBasicBlock::iterator &Inst) {
// Scan the assembly for ST registers used, defined and clobbered. We can
// only tell clobbers from defs by looking at the asm descriptor.
unsigned STUses = 0, STDefs = 0, STClobbers = 0, STDeadDefs = 0;
unsigned STUses = 0, STDefs = 0, STClobbers = 0;
unsigned NumOps = 0;
SmallSet<unsigned, 1> FRegIdx;
unsigned RCID;
@ -1559,8 +1559,6 @@ void FPS::handleSpecialFP(MachineBasicBlock::iterator &Inst) {
case InlineAsm::Kind_RegDef:
case InlineAsm::Kind_RegDefEarlyClobber:
STDefs |= (1u << STReg);
if (MO.isDead())
STDeadDefs |= (1u << STReg);
break;
case InlineAsm::Kind_Clobber:
STClobbers |= (1u << STReg);

2
utils/benchmark/src/complexity.cc
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@ -76,7 +76,6 @@ std::string GetBigOString(BigO complexity) {
LeastSq MinimalLeastSq(const std::vector<int64_t>& n,
const std::vector<double>& time,
BigOFunc* fitting_curve) {
double sigma_gn = 0.0;
double sigma_gn_squared = 0.0;
double sigma_time = 0.0;
double sigma_time_gn = 0.0;
@ -84,7 +83,6 @@ LeastSq MinimalLeastSq(const std::vector<int64_t>& n,
// Calculate least square fitting parameter
for (size_t i = 0; i < n.size(); ++i) {
double gn_i = fitting_curve(n[i]);
sigma_gn += gn_i;
sigma_gn_squared += gn_i * gn_i;
sigma_time += time[i];
sigma_time_gn += time[i] * gn_i;