[X86] widen_shuffle-1.ll - update shuffle tests to take poison arg instead of undef

Author: RKSimon

llvm/test/CodeGen/X86/widen_shuffle-1.ll

@@ -71,16 +71,16 @@ define void @shuf3(<4 x float> %tmp10, <4 x float> %vecinit15, ptr %dst) nounwin
 ; X64-NEXT:    retq
 entry:
   %shuffle.i.i.i12 = shufflevector <4 x float> %tmp10, <4 x float> %vecinit15, <4 x i32> <i32 0, i32 1, i32 4, i32 5>
-  %tmp25.i.i = shufflevector <4 x float> %shuffle.i.i.i12, <4 x float> undef, <3 x i32> <i32 0, i32 1, i32 2>
+  %tmp25.i.i = shufflevector <4 x float> %shuffle.i.i.i12, <4 x float> poison, <3 x i32> <i32 0, i32 1, i32 2>
   %tmp1.i.i = shufflevector <3 x float> %tmp25.i.i, <3 x float> zeroinitializer, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
-  %tmp3.i13 = shufflevector <4 x float> %tmp1.i.i, <4 x float> undef, <3 x i32> <i32 0, i32 1, i32 2> ; <<3 x float>>
+  %tmp3.i13 = shufflevector <4 x float> %tmp1.i.i, <4 x float> poison, <3 x i32> <i32 0, i32 1, i32 2> ; <<3 x float>>
   %tmp6.i14 = shufflevector <3 x float> %tmp3.i13, <3 x float> zeroinitializer, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
-  %tmp97.i = shufflevector <4 x float> %tmp6.i14, <4 x float> undef, <3 x i32> <i32 0, i32 1, i32 2>
-  %tmp2.i18 = shufflevector <3 x float> %tmp97.i, <3 x float> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 2>
+  %tmp97.i = shufflevector <4 x float> %tmp6.i14, <4 x float> poison, <3 x i32> <i32 0, i32 1, i32 2>
+  %tmp2.i18 = shufflevector <3 x float> %tmp97.i, <3 x float> poison, <4 x i32> <i32 0, i32 1, i32 2, i32 2>
   %t5 = bitcast <4 x float> %tmp2.i18 to <4 x i32>
   %shr.i.i19 = lshr <4 x i32> %t5, <i32 19, i32 19, i32 19, i32 19>
   %and.i.i20 = and <4 x i32> %shr.i.i19, <i32 4080, i32 4080, i32 4080, i32 4080>
-  %shuffle.i.i.i21 = shufflevector <4 x float> %tmp2.i18, <4 x float> undef, <4 x i32> <i32 2, i32 3, i32 2, i32 3>
+  %shuffle.i.i.i21 = shufflevector <4 x float> %tmp2.i18, <4 x float> poison, <4 x i32> <i32 2, i32 3, i32 2, i32 3>
   store <4 x float> %shuffle.i.i.i21, ptr %dst
   ret void
 }
@@ -114,7 +114,7 @@ define void @shuf5(ptr %p) nounwind {
 ; X64-NEXT:    movabsq $2387225703656530209, %rax # imm = 0x2121212121212121
 ; X64-NEXT:    movq %rax, (%rdi)
 ; X64-NEXT:    retq
-  %v = shufflevector <2 x i8> <i8 4, i8 33>, <2 x i8> undef, <8 x i32> <i32 1, i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+  %v = shufflevector <2 x i8> <i8 4, i8 33>, <2 x i8> poison, <8 x i32> <i32 1, i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   store <8 x i8> %v, ptr %p, align 8
   ret void
 }