Imported Upstream version 5.18.0.182

Former-commit-id: f9d55cf82631bfd710c387739687e5845296aea1

external/llvm/test/CodeGen/X86/shift-combine-crash.ll

@@ -1,57 +0,0 @@
-; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 > /dev/null
-
-; Verify that DAGCombiner doesn't crash with an assertion failure in the
-; attempt to cast a ISD::UNDEF node to a ConstantSDNode.
-
-; During type legalization, the vector shift operation in function @test1 is
-; split into two legal shifts that work on <2 x i64> elements.
-; The first shift of the legalized sequence would be a shift by all undefs.
-; DAGCombiner will then try to simplify the vector shift and check if the
-; vector of shift counts is a splat. Make sure that llc doesn't crash
-; at that stage.
-
-
-define <4 x i64> @test1(<4 x i64> %A) {
-  %shl = shl <4 x i64> %A, <i64 undef, i64 undef, i64 1, i64 2>
-  ret <4 x i64> %shl
-}
-
-; Also, verify that DAGCombiner doesn't crash when trying to combine shifts
-; with different combinations of undef elements in the vector shift count.
-
-define <4 x i64> @test2(<4 x i64> %A) {
-  %shl = shl <4 x i64> %A, <i64 2, i64 3, i64 undef, i64 undef>
-  ret <4 x i64> %shl
-}
-
-define <4 x i64> @test3(<4 x i64> %A) {
-  %shl = shl <4 x i64> %A, <i64 2, i64 undef, i64 3, i64 undef>
-  ret <4 x i64> %shl
-}
-
-define <4 x i64> @test4(<4 x i64> %A) {
-  %shl = shl <4 x i64> %A, <i64 undef, i64 2, i64 undef, i64 3>
-  ret <4 x i64> %shl
-}
-
-define <4 x i64> @test5(<4 x i64> %A) {
-  %shl = shl <4 x i64> %A, <i64 2, i64 undef, i64 undef, i64 undef>
-  ret <4 x i64> %shl
-}
-
-define <4 x i64> @test6(<4 x i64> %A) {
-  %shl = shl <4 x i64> %A, <i64 undef, i64 undef, i64 3, i64 undef>
-  ret <4 x i64> %shl
-}
-
-define <4 x i64> @test7(<4 x i64> %A) {
-  %shl = shl <4 x i64> %A, <i64 undef, i64 undef, i64 undef, i64 3>
-  ret <4 x i64> %shl
-}
-
-define <4 x i64> @test8(<4 x i64> %A) {
-  %shl = shl <4 x i64> %A, <i64 undef, i64 undef, i64 undef, i64 undef>
-  ret <4 x i64> %shl
-}
-
-