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Add an option to disable 32 -> 16-bit Thumb2 size reduction pass for experimentation.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110579 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2010-08-09 17:16:10 +00:00
parent fffe6cf084
commit e8846feaa1
1 changed files with 7 additions and 2 deletions
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9
lib/Target/ARM/ARMTargetMachine.cpp
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@ -16,11 +16,17 @@
#include "ARM.h"
#include "llvm/PassManager.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegistry.h"
using namespace llvm;
static cl::opt<bool>
Prefer32BitThumbInstrs("prefer-32bit-thumb",
cl::desc("Prefer 32-bit Thumb instructions"),
cl::init(false));
static MCAsmInfo *createMCAsmInfo(const Target &T, StringRef TT) {
Triple TheTriple(TT);
switch (TheTriple.getOS()) {
@ -31,7 +37,6 @@ static MCAsmInfo *createMCAsmInfo(const Target &T, StringRef TT) {
}
}
extern "C" void LLVMInitializeARMTarget() {
// Register the target.
RegisterTargetMachine<ARMTargetMachine> X(TheARMTarget);
@ -138,7 +143,7 @@ bool ARMBaseTargetMachine::addPreSched2(PassManagerBase &PM,
bool ARMBaseTargetMachine::addPreEmitPass(PassManagerBase &PM,
CodeGenOpt::Level OptLevel) {
if (Subtarget.isThumb2())
if (!Prefer32BitThumbInstrs && Subtarget.isThumb2())
PM.add(createThumb2SizeReductionPass());
PM.add(createARMConstantIslandPass());