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Add a command line option to skip the delay slot filler pass entirely for Mips.

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The purpose of this option is to silence error messages issued by machine
verifier passes and enable them to run to the end. If this option is not
provided, -verify-machineinstrs complains when it discovers there is a
non-terminator instruction (an instruction that is in a delay slot) after the
first terminator in a basic block.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156790 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2012-05-14 23:59:17 +00:00
parent 24b709529f
commit f9c3f3b8a8
1 changed files with 10 additions and 0 deletions
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10
lib/Target/Mips/MipsDelaySlotFiller.cpp
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@ -36,6 +36,13 @@ static cl::opt<bool> EnableDelaySlotFiller(
cl::desc("Fill the Mips delay slots useful instructions."),
cl::Hidden);
// This option can be used to silence complaints by machine verifier passes.
static cl::opt<bool> SkipDelaySlotFiller(
"skip-mips-delay-filler",
cl::init(false),
cl::desc("Skip MIPS' delay slot filling pass."),
cl::Hidden);
namespace {
struct Filler : public MachineFunctionPass {
@ -53,6 +60,9 @@ namespace {
bool runOnMachineBasicBlock(MachineBasicBlock &MBB);
bool runOnMachineFunction(MachineFunction &F) {
if (SkipDelaySlotFiller)
return false;
bool Changed = false;
for (MachineFunction::iterator FI = F.begin(), FE = F.end();
FI != FE; ++FI)