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| author | dim <dim@FreeBSD.org> | 2012-08-15 19:34:23 +0000 |
|---|---|---|
| committer | dim <dim@FreeBSD.org> | 2012-08-15 19:34:23 +0000 |
| commit | 721c201bd55ffb73cb2ba8d39e0570fa38c44e15 (patch) | |
| tree | eacfc83d988e4b9d11114387ae7dc41243f2a363 /lib/Target/NVPTX/NVPTXAllocaHoisting.cpp | |
| parent | 2b2816e083a455f7a656ae88b0fd059d1688bb36 (diff) | |
| download | FreeBSD-src-721c201bd55ffb73cb2ba8d39e0570fa38c44e15.zip FreeBSD-src-721c201bd55ffb73cb2ba8d39e0570fa38c44e15.tar.gz | |
Vendor import of llvm trunk r161861:
http://llvm.org/svn/llvm-project/llvm/trunk@161861
Diffstat (limited to 'lib/Target/NVPTX/NVPTXAllocaHoisting.cpp')
| -rw-r--r-- | lib/Target/NVPTX/NVPTXAllocaHoisting.cpp | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/lib/Target/NVPTX/NVPTXAllocaHoisting.cpp b/lib/Target/NVPTX/NVPTXAllocaHoisting.cpp new file mode 100644 index 0000000..668c393 --- /dev/null +++ b/lib/Target/NVPTX/NVPTXAllocaHoisting.cpp @@ -0,0 +1,48 @@ +//===-- AllocaHoisting.cpp - Hoist allocas to the entry block --*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// Hoist the alloca instructions in the non-entry blocks to the entry blocks. +// +//===----------------------------------------------------------------------===// + +#include "llvm/Function.h" +#include "llvm/Instructions.h" +#include "llvm/Constants.h" +#include "NVPTXAllocaHoisting.h" + +namespace llvm { + +bool NVPTXAllocaHoisting::runOnFunction(Function &function) { + bool functionModified = false; + Function::iterator I = function.begin(); + TerminatorInst *firstTerminatorInst = (I++)->getTerminator(); + + for (Function::iterator E = function.end(); I != E; ++I) { + for (BasicBlock::iterator BI = I->begin(), BE = I->end(); BI != BE;) { + AllocaInst *allocaInst = dyn_cast<AllocaInst>(BI++); + if (allocaInst && isa<ConstantInt>(allocaInst->getArraySize())) { + allocaInst->moveBefore(firstTerminatorInst); + functionModified = true; + } + } + } + + return functionModified; +} + +char NVPTXAllocaHoisting::ID = 1; +RegisterPass<NVPTXAllocaHoisting> X("alloca-hoisting", + "Hoisting alloca instructions in non-entry " + "blocks to the entry block"); + +FunctionPass *createAllocaHoisting() { + return new NVPTXAllocaHoisting(); +} + +} // end namespace llvm |
