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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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58144 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-10-25 17:46:52 +00:00
parent a2cbe6c5b5
commit 71b7f646de
2 changed files with 5 additions and 4 deletions
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4
lib/CodeGen/LLVMTargetMachine.cpp
View File

@ -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;
}