Precommit tests

Author: lukel97

llvm/test/Transforms/InstCombine/scalable-trunc.ll

@@ -20,6 +20,21 @@ entry:
   ret void
 }
 
+define <vscale x 1 x i8> @constant_splat_trunc() {
+; CHECK-LABEL: @constant_splat_trunc(
+; CHECK-NEXT:    ret <vscale x 1 x i8> trunc (<vscale x 1 x i64> splat (i64 1) to <vscale x 1 x i8>)
+;
+  %1 = trunc <vscale x 1 x i64> splat (i64 1) to <vscale x 1 x i8>
+  ret <vscale x 1 x i8> %1
+}
+
+define <vscale x 1 x i8> @constant_splat_trunc_constantexpr() {
+; CHECK-LABEL: @constant_splat_trunc_constantexpr(
+; CHECK-NEXT:    ret <vscale x 1 x i8> trunc (<vscale x 1 x i64> splat (i64 1) to <vscale x 1 x i8>)
+;
+  ret <vscale x 1 x i8> trunc (<vscale x 1 x i64> splat (i64 1) to <vscale x 1 x i8>)
+}
+
 declare void @llvm.aarch64.sve.st1.nxv2i32(<vscale x 2 x i32>, <vscale x 2 x i1>, ptr)
 declare <vscale x 2 x i1> @llvm.aarch64.sve.convert.from.svbool.nxv2i1(<vscale x 16 x i1>)
 declare <vscale x 16 x i1> @llvm.aarch64.sve.ptrue.nxv16i1(i32 %pattern)