Imported Upstream version 5.18.0.234

Former-commit-id: 8071ec1a8c5eaa9be24b41745add19297608001f

external/llvm/test/CodeGen/AArch64/arm64-AnInfiniteLoopInDAGCombine.ll

@@ -1,23 +0,0 @@
-; RUN: llc < %s -mtriple=arm64-eabi
-
-; This test case tests an infinite loop bug in DAG combiner.
-; It just tries to do the following replacing endlessly:
-; (1)  Replacing.3 0x2c509f0: v4i32 = any_extend 0x2c4cd08 [ORD=4]
-;      With: 0x2c4d128: v4i32 = sign_extend 0x2c4cd08 [ORD=4]
-;
-; (2)  Replacing.2 0x2c4d128: v4i32 = sign_extend 0x2c4cd08 [ORD=4]
-;      With: 0x2c509f0: v4i32 = any_extend 0x2c4cd08 [ORD=4]
-; As we think the (2) optimization from SIGN_EXTEND to ANY_EXTEND is
-; an optimization to replace unused bits with undefined bits, we remove
-; the (1) optimization (It doesn't make sense to replace undefined bits
-; with signed bits).
-
-define <4 x i32> @infiniteLoop(<4 x i32> %in0, <4 x i16> %in1) {
-entry:
-  %cmp.i = icmp sge <4 x i16> %in1, <i16 32767, i16 32767, i16 -1, i16 -32768>
-  %sext.i = sext <4 x i1> %cmp.i to <4 x i32>
-  %mul.i = mul <4 x i32> %in0, %sext.i
-  %sext = shl <4 x i32> %mul.i, <i32 16, i32 16, i32 16, i32 16>
-  %vmovl.i.i = ashr <4 x i32> %sext, <i32 16, i32 16, i32 16, i32 16>
-  ret <4 x i32> %vmovl.i.i
-}