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Move the code that adds the DeadMachineInstructionElimPass from

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target-independent code to target-specific code. This prevents it
from running on targets that aren't using fast-isel.

In addition to saving compile time, this addresses the problem
that not all targets are prepared for it. In order to use this
pass, all instructions must declare all their fixed uses and
defs of physical registers.

llvm-svn: 58144
This commit is contained in:
Dan Gohman 2008-10-25 17:46:52 +00:00
parent e5b0182e94
commit 66e878f316
2 changed files with 5 additions and 4 deletions
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4
lib/CodeGen/LLVMTargetMachine.cpp
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@ -185,10 +185,6 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM, bool Fast) {
if (PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(cerr));
// If we're using Fast-ISel, clean up the mess.
if (EnableFastISel)
PM.add(createDeadMachineInstructionElimPass());
if (EnableLICM)
PM.add(createMachineLICMPass());

5
lib/Target/X86/X86TargetMachine.cpp
View File

@ -183,6 +183,11 @@ X86TargetMachine::X86TargetMachine(const Module &M, const std::string &FS,
bool X86TargetMachine::addInstSelector(PassManagerBase &PM, bool Fast) {
// Install an instruction selector.
PM.add(createX86ISelDag(*this, Fast));
// If we're using Fast-ISel, clean up the mess.
if (EnableFastISel)
PM.add(createDeadMachineInstructionElimPass());
return false;
}