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Mark rotl/rotr as expand. This generates pretty ugly code, but this is better than nothing.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71976 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2009-05-17 10:16:28 +00:00
parent aceb620de8
commit e4fdb8b8ff
2 changed files with 21 additions and 0 deletions
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4
lib/Target/MSP430/MSP430ISelLowering.cpp
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@ -73,6 +73,10 @@ MSP430TargetLowering::MSP430TargetLowering(MSP430TargetMachine &tm) :
setOperationAction(ISD::SRA, MVT::i16, Custom);
setOperationAction(ISD::SHL, MVT::i16, Custom);
setOperationAction(ISD::SRL, MVT::i16, Custom);
setOperationAction(ISD::ROTL, MVT::i8, Expand);
setOperationAction(ISD::ROTR, MVT::i8, Expand);
setOperationAction(ISD::ROTL, MVT::i16, Expand);
setOperationAction(ISD::ROTR, MVT::i16, Expand);
setOperationAction(ISD::RET, MVT::Other, Custom);
setOperationAction(ISD::GlobalAddress, MVT::i16, Custom);
setOperationAction(ISD::ExternalSymbol, MVT::i16, Custom);

17
test/CodeGen/MSP430/2009-05-17-Rot.ll Normal file
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@ -0,0 +1,17 @@
; RUN: llvm-as < %s | llc -march=msp430
define i16 @rol1u16(i16 %x.arg) nounwind {
%retval = alloca i16
%x = alloca i16
store i16 %x.arg, i16* %x
%1 = load i16* %x
%2 = shl i16 %1, 1
%3 = load i16* %x
%4 = lshr i16 %3, 15
%5 = or i16 %2, %4
store i16 %5, i16* %retval
br label %return
return:
%6 = load i16* %retval
ret i16 %6
}