Files
archived-llvm/lib/Target/AMDGPU/AMDGPUMachineFunction.cpp
Evgeniy Stepanov 1382a3a7e8 Revert "AMDGPU: Fix handling of alignment padding in DAG argument lowering"
This reverts commit r337021.

WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x1415cd65 in void write_signed<long>(llvm::raw_ostream&, long, unsigned long, llvm::IntegerStyle) /code/llvm-project/llvm/lib/Support/NativeFormatting.cpp:95:7
    #1 0x1415c900 in llvm::write_integer(llvm::raw_ostream&, long, unsigned long, llvm::IntegerStyle) /code/llvm-project/llvm/lib/Support/NativeFormatting.cpp:121:3
    #2 0x1472357f in llvm::raw_ostream::operator<<(long) /code/llvm-project/llvm/lib/Support/raw_ostream.cpp:117:3
    #3 0x13bb9d4 in llvm::raw_ostream::operator<<(int) /code/llvm-project/llvm/include/llvm/Support/raw_ostream.h:210:18
    #4 0x3c2bc18 in void printField<unsigned int, &(amd_kernel_code_s::amd_kernel_code_version_major)>(llvm::StringRef, amd_kernel_code_s const&, llvm::raw_ostream&) /code/llvm-project/llvm/lib/Target/AMDGPU/Utils/AMDKernelCodeTUtils.cpp:78:23
    #5 0x3c250ba in llvm::printAmdKernelCodeField(amd_kernel_code_s const&, int, llvm::raw_ostream&) /code/llvm-project/llvm/lib/Target/AMDGPU/Utils/AMDKernelCodeTUtils.cpp:104:5
    #6 0x3c27ca3 in llvm::dumpAmdKernelCode(amd_kernel_code_s const*, llvm::raw_ostream&, char const*) /code/llvm-project/llvm/lib/Target/AMDGPU/Utils/AMDKernelCodeTUtils.cpp:113:5
    #7 0x3a46e6c in llvm::AMDGPUTargetAsmStreamer::EmitAMDKernelCodeT(amd_kernel_code_s const&) /code/llvm-project/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp:161:3
    #8 0xd371e4 in llvm::AMDGPUAsmPrinter::EmitFunctionBodyStart() /code/llvm-project/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp:204:26

[...]

Uninitialized value was created by an allocation of 'KernelCode' in the stack frame of function '_ZN4llvm16AMDGPUAsmPrinter21EmitFunctionBodyStartEv'
    #0 0xd36650 in llvm::AMDGPUAsmPrinter::EmitFunctionBodyStart() /code/llvm-project/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp:192

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337079 91177308-0d34-0410-b5e6-96231b3b80d8
2018-07-14 01:20:53 +00:00

59 lines
2.0 KiB
C++

//===-- AMDGPUMachineFunctionInfo.cpp ---------------------------------------=//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "AMDGPUMachineFunction.h"
#include "AMDGPUSubtarget.h"
#include "AMDGPUPerfHintAnalysis.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
using namespace llvm;
AMDGPUMachineFunction::AMDGPUMachineFunction(const MachineFunction &MF) :
MachineFunctionInfo(),
LocalMemoryObjects(),
ExplicitKernArgSize(0),
MaxKernArgAlign(0),
LDSSize(0),
IsEntryFunction(AMDGPU::isEntryFunctionCC(MF.getFunction().getCallingConv())),
NoSignedZerosFPMath(MF.getTarget().Options.NoSignedZerosFPMath),
MemoryBound(false),
WaveLimiter(false) {
// FIXME: Should initialize KernArgSize based on ExplicitKernelArgOffset,
// except reserved size is not correctly aligned.
if (auto *Resolver = MF.getMMI().getResolver()) {
if (AMDGPUPerfHintAnalysis *PHA = static_cast<AMDGPUPerfHintAnalysis*>(
Resolver->getAnalysisIfAvailable(&AMDGPUPerfHintAnalysisID, true))) {
MemoryBound = PHA->isMemoryBound(&MF.getFunction());
WaveLimiter = PHA->needsWaveLimiter(&MF.getFunction());
}
}
}
unsigned AMDGPUMachineFunction::allocateLDSGlobal(const DataLayout &DL,
const GlobalValue &GV) {
auto Entry = LocalMemoryObjects.insert(std::make_pair(&GV, 0));
if (!Entry.second)
return Entry.first->second;
unsigned Align = GV.getAlignment();
if (Align == 0)
Align = DL.getABITypeAlignment(GV.getValueType());
/// TODO: We should sort these to minimize wasted space due to alignment
/// padding. Currently the padding is decided by the first encountered use
/// during lowering.
unsigned Offset = LDSSize = alignTo(LDSSize, Align);
Entry.first->second = Offset;
LDSSize += DL.getTypeAllocSize(GV.getValueType());
return Offset;
}