[llvm] [PowerPC] extend smaller splats into bigger splats (with fix) (PR #142194)

[via llvm-commits]

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@@ -3713,30 +3713,26 @@ entry:
 define <2 x i64> @spltConst1ll() {
 ; P9BE-LABEL: spltConst1ll:
 ; P9BE:       # %bb.0: # %entry
-; P9BE-NEXT:    addis r3, r2, .LCPI65_0 at toc@ha
-; P9BE-NEXT:    addi r3, r3, .LCPI65_0 at toc@l
-; P9BE-NEXT:    lxv v2, 0(r3)
+; P9BE-NEXT:    vspltisw v2, 1
+; P9BE-NEXT:    vupklsw v2, v2
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RolandF77 wrote:

To be clearer, we already generate xxsplitdp or xxsplti32dx for P10. Can't always use xxsplitidp since it is floating point.

https://github.com/llvm/llvm-project/pull/142194