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Enable DeadMachineInstructionElim when Fast-ISel is enabled.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56604 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -101,6 +101,12 @@ namespace llvm {
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/// DisableJumpTables - This flag indicates jump tables should not be
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/// generated.
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extern bool DisableJumpTables;
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/// FastISel - This flag enables fast-path instruction selection
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/// which trades away generated code quality in favor of reducing
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/// compile time.
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extern bool EnableFastISel;
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} // End llvm namespace
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#endif
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@ -25,6 +25,10 @@
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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namespace llvm {
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bool EnableFastISel;
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}
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static cl::opt<bool> PrintLSR("print-lsr-output", cl::Hidden,
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cl::desc("Print LLVM IR produced by the loop-reduce pass"));
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static cl::opt<bool> PrintISelInput("print-isel-input", cl::Hidden,
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@ -49,6 +53,11 @@ DisablePostRAScheduler("disable-post-RA-scheduler",
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cl::desc("Disable scheduling after register allocation"),
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cl::init(true));
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static cl::opt<bool, true>
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FastISelOption("fast-isel", cl::Hidden,
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cl::desc("Enable the experimental \"fast\" instruction selector"),
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cl::location(EnableFastISel));
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FileModel::Model
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LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
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raw_ostream &Out,
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@ -168,6 +177,10 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM, bool Fast) {
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if (PrintMachineCode)
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PM.add(createMachineFunctionPrinterPass(cerr));
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// If we're using Fast-ISel, clean up the mess.
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if (EnableFastISel)
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PM.add(createDeadMachineInstructionElimPass());
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if (EnableLICM)
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PM.add(createMachineLICMPass());
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@ -56,9 +56,6 @@ EnableValueProp("enable-value-prop", cl::Hidden);
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static cl::opt<bool>
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EnableLegalizeTypes("enable-legalize-types", cl::Hidden);
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static cl::opt<bool>
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EnableFastISel("fast-isel", cl::Hidden,
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cl::desc("Enable the experimental \"fast\" instruction selector"));
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static cl::opt<bool>
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EnableFastISelVerbose("fast-isel-verbose", cl::Hidden,
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cl::desc("Enable verbose messages in the experimental \"fast\" "
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"instruction selector"));
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