diff options
| author | Akira Hatanaka <ahatanaka@mips.com> | 2012-08-24 20:40:15 +0000 |
|---|---|---|
| committer | Akira Hatanaka <ahatanaka@mips.com> | 2012-08-24 20:40:15 +0000 |
| commit | 16865d06128c266b5505cc21f5d086d18173408c (patch) | |
| tree | af72fa7d11469231e5f5c11356f0710a49fd0f42 | |
| parent | 45d8dbc92d365e9c0a08ceb0bc7a9014e6064bdb (diff) | |
Disable Mips' delay slot filler when optimization level is O0.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162589 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/Mips/MipsDelaySlotFiller.cpp | 4 | ||||
| -rw-r--r-- | test/CodeGen/Mips/brdelayslot.ll | 18 |
2 files changed, 15 insertions, 7 deletions
diff --git a/lib/Target/Mips/MipsDelaySlotFiller.cpp b/lib/Target/Mips/MipsDelaySlotFiller.cpp index 8fe3ba6171..e3c8ed75cf 100644 --- a/lib/Target/Mips/MipsDelaySlotFiller.cpp +++ b/lib/Target/Mips/MipsDelaySlotFiller.cpp @@ -115,7 +115,9 @@ runOnMachineBasicBlock(MachineBasicBlock &MBB) { InstrIter D; - if (!DisableDelaySlotFiller && findDelayInstr(MBB, I, D)) { + // Delay slot filling is disabled at -O0. + if (!DisableDelaySlotFiller && (TM.getOptLevel() != CodeGenOpt::None) && + findDelayInstr(MBB, I, D)) { MBB.splice(llvm::next(I), &MBB, D); ++UsefulSlots; } else diff --git a/test/CodeGen/Mips/brdelayslot.ll b/test/CodeGen/Mips/brdelayslot.ll index d2832da62b..1b2fbc8932 100644 --- a/test/CodeGen/Mips/brdelayslot.ll +++ b/test/CodeGen/Mips/brdelayslot.ll @@ -1,12 +1,18 @@ -; RUN: llc -march=mipsel < %s | FileCheck %s +; RUN: llc -march=mipsel -O0 < %s | FileCheck %s -check-prefix=None +; RUN: llc -march=mipsel < %s | FileCheck %s -check-prefix=Default define void @foo1() nounwind { entry: -; CHECK: jalr -; CHECK-NOT: nop -; CHECK: jr -; CHECK-NOT: nop -; CHECK: .end +; Default: jalr +; Default-NOT: nop +; Default: jr +; Default-NOT: nop +; Default: .end +; None: jalr +; None: nop +; None: jr +; None: nop +; None: .end tail call void @foo2(i32 3) nounwind ret void |