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    • Nate Begeman's avatar
      Teach the SelectionDAG ISel how to turn ConstantPacked values into · 41b1cdc7
      Nate Begeman authored
      constant nodes with vector types.  Also teach the asm printer how to print
      ConstantPacked constant pool entries.  This allows us to generate altivec
      code such as the following, which adds a vector constantto a packed float.
      
      LCPI1_0:  <4 x float> < float 0.0e+0, float 0.0e+0, float 0.0e+0, float 1.0e+0 >
              .space  4
              .space  4
              .space  4
              .long   1065353216      ; float 1
              .text
              .align  4
              .globl  _foo
      _foo:
              lis r2, ha16(LCPI1_0)
              la r2, lo16(LCPI1_0)(r2)
              li r4, 0
              lvx v0, r4, r2
              lvx v1, r4, r3
              vaddfp v0, v1, v0
              stvx v0, r4, r3
              blr
      
      For the llvm code:
      
      void %foo(<4 x float> * %a) {
      entry:
        %tmp1 = load <4 x float> * %a;
        %tmp2 = add <4 x float> %tmp1, < float 0.0, float 0.0, float 0.0, float 1.0 >
        store <4 x float> %tmp2, <4 x float> *%a
        ret void
      }
      
      llvm-svn: 24616
      41b1cdc7
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