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| author | Chad Rosier <mcrosier@apple.com> | 2012-09-21 00:41:42 +0000 |
|---|---|---|
| committer | Chad Rosier <mcrosier@apple.com> | 2012-09-21 00:41:42 +0000 |
| commit | d70c98e884d19c4d94b5e83efd32888b8ee47869 (patch) | |
| tree | 7f5c92c65b8255391f275a2d812c3c1f5a305f99 /lib/Target/ARM | |
| parent | d314ab525db93cdb51ede18830b95c97af497e3c (diff) | |
| download | external_llvm-d70c98e884d19c4d94b5e83efd32888b8ee47869.zip external_llvm-d70c98e884d19c4d94b5e83efd32888b8ee47869.tar.gz external_llvm-d70c98e884d19c4d94b5e83efd32888b8ee47869.tar.bz2 | |
[fast-isel] Fallback to SelectionDAG isel if we require strict alignment for
non-halfword-aligned i16 loads/stores.
rdar://12304911
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164345 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/ARM')
| -rw-r--r-- | lib/Target/ARM/ARMFastISel.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMFastISel.cpp b/lib/Target/ARM/ARMFastISel.cpp index 045d904..af45ed7 100644 --- a/lib/Target/ARM/ARMFastISel.cpp +++ b/lib/Target/ARM/ARMFastISel.cpp @@ -1021,6 +1021,9 @@ bool ARMFastISel::ARMEmitLoad(EVT VT, unsigned &ResultReg, Address &Addr, RC = &ARM::GPRRegClass; break; case MVT::i16: + if (Alignment && Alignment < 2 && !Subtarget->allowsUnalignedMem()) + return false; + if (isThumb2) { if (Addr.Offset < 0 && Addr.Offset > -256 && Subtarget->hasV6T2Ops()) Opc = isZExt ? ARM::t2LDRHi8 : ARM::t2LDRSHi8; @@ -1139,6 +1142,9 @@ bool ARMFastISel::ARMEmitStore(EVT VT, unsigned SrcReg, Address &Addr, } break; case MVT::i16: + if (Alignment && Alignment < 2 && !Subtarget->allowsUnalignedMem()) + return false; + if (isThumb2) { if (Addr.Offset < 0 && Addr.Offset > -256 && Subtarget->hasV6T2Ops()) StrOpc = ARM::t2STRHi8; |