[llvm] r194126 - Fix definition for Mips16 pc relative load word instructions.

[Rafael Espíndola]

Test case?

On Tuesday, November 5, 2013, Reed Kotler wrote:

> Author: rkotler
> Date: Tue Nov  5 22:29:52 2013
> New Revision: 194126
>
> URL: http://llvm.org/viewvc/llvm-project?rev=194126&view=rev
> Log:
> Fix definition for Mips16 pc relative load word instructions.
>
>
> Modified:
>     llvm/trunk/lib/Target/Mips/MipsConstantIslandPass.cpp
>
> Modified: llvm/trunk/lib/Target/Mips/MipsConstantIslandPass.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsConstantIslandPass.cpp?rev=194126&r1=194125&r2=194126&view=diff
>
> ==============================================================================
> --- llvm/trunk/lib/Target/Mips/MipsConstantIslandPass.cpp (original)
> +++ llvm/trunk/lib/Target/Mips/MipsConstantIslandPass.cpp Tue Nov  5
> 22:29:52 2013
> @@ -614,12 +614,13 @@ initializeFunctionInfo(const std::vector
>              llvm_unreachable("Unknown addressing mode for CP reference!");
>            case Mips::LwRxPcTcp16:
>              Bits = 8;
> -            Scale = 2;
> +            Scale = 4;
>              LongFormOpcode = Mips::LwRxPcTcpX16;
>              break;
>            case Mips::LwRxPcTcpX16:
>              Bits = 16;
> -            Scale = 2;
> +            Scale = 1;
> +            NegOk = true;
>              break;
>            }
>            // Remember that this is a user of a CP entry.
> @@ -782,9 +783,6 @@ MachineBasicBlock *MipsConstantIslands::
>  /// isOffsetInRange - Checks whether UserOffset (the location of a
> constant pool
>  /// reference) is within MaxDisp of TrialOffset (a proposed location of a
>  /// constant pool entry).
> -/// UserOffset is computed by getUserOffset above to include PC
> adjustments. If
> -/// the mod 4 alignment of UserOffset is not known, the uncertainty must
> be
> -/// subtracted from MaxDisp instead. CPUser::getMaxDisp() does that.
>  bool MipsConstantIslands::isOffsetInRange(unsigned UserOffset,
>                                           unsigned TrialOffset, unsigned
> MaxDisp,
>                                           bool NegativeOK) {
>
>
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