[InstCombine] add tests for vector icmp with undef constant elements; NFC

Author: rotateright

llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ne-to-icmp-ugt.ll

@@ -90,6 +90,16 @@ define <3 x i1> @p3_vec_splat_undef(<3 x i8> %x) {
   ret <3 x i1> %ret
 }
 
+define <3 x i1> @p3_vec_nonsplat_undef(<3 x i8> %x) {
+; CHECK-LABEL: @p3_vec_nonsplat_undef(
+; CHECK-NEXT:    [[TMP1:%.*]] = icmp ugt <3 x i8> [[X:%.*]], <i8 -1, i8 undef, i8 3>
+; CHECK-NEXT:    ret <3 x i1> [[TMP1]]
+;
+  %tmp0 = and <3 x i8> %x, <i8 -1, i8 undef, i8 3>
+  %ret = icmp ne <3 x i8> %tmp0, %x
+  ret <3 x i1> %ret
+}
+
 ; ============================================================================ ;
 ; Commutativity tests.
 ; ============================================================================ ;

llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sgt-to-icmp-sgt.ll

@@ -85,6 +85,18 @@ define <3 x i1> @p3_vec_splat_undef() {
   ret <3 x i1> %ret
 }
 
+define <3 x i1> @p3_vec_nonsplat_undef() {
+; CHECK-LABEL: @p3_vec_nonsplat_undef(
+; CHECK-NEXT:    [[X:%.*]] = call <3 x i8> @gen3x8()
+; CHECK-NEXT:    [[TMP1:%.*]] = icmp sgt <3 x i8> [[X]], <i8 15, i8 3, i8 undef>
+; CHECK-NEXT:    ret <3 x i1> [[TMP1]]
+;
+  %x = call <3 x i8> @gen3x8()
+  %tmp0 = and <3 x i8> %x, <i8 15, i8 3, i8 undef>
+  %ret = icmp sgt <3 x i8> %x, %tmp0
+  ret <3 x i1> %ret
+}
+
 ; ============================================================================ ;
 ; One-use tests. We don't care about multi-uses here.
 ; ============================================================================ ;

llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-slt-to-icmp-sgt.ll

@@ -69,6 +69,16 @@ define <3 x i1> @p3_vec_splat_undef(<3 x i8> %x) {
   ret <3 x i1> %ret
 }
 
+define <3 x i1> @p3_vec_nonsplat_undef(<3 x i8> %x) {
+; CHECK-LABEL: @p3_vec_nonsplat_undef(
+; CHECK-NEXT:    [[TMP1:%.*]] = icmp sgt <3 x i8> [[X:%.*]], <i8 undef, i8 15, i8 3>
+; CHECK-NEXT:    ret <3 x i1> [[TMP1]]
+;
+  %tmp0 = and <3 x i8> %x, <i8 undef, i8 15, i8 3>
+  %ret = icmp slt <3 x i8> %tmp0, %x
+  ret <3 x i1> %ret
+}
+
 ; ============================================================================ ;
 ; One-use tests. We don't care about multi-uses here.
 ; ============================================================================ ;

llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ugt-to-icmp-ugt.ll

@@ -108,6 +108,18 @@ define <3 x i1> @p3_vec_splat_undef() {
   ret <3 x i1> %ret
 }
 
+define <3 x i1> @p3_vec_nonsplat_undef() {
+; CHECK-LABEL: @p3_vec_nonsplat_undef(
+; CHECK-NEXT:    [[X:%.*]] = call <3 x i8> @gen3x8()
+; CHECK-NEXT:    [[TMP1:%.*]] = icmp ugt <3 x i8> [[X]], <i8 3, i8 undef, i8 15>
+; CHECK-NEXT:    ret <3 x i1> [[TMP1]]
+;
+  %x = call <3 x i8> @gen3x8()
+  %tmp0 = and <3 x i8> %x, <i8 3, i8 undef, i8 15>
+  %ret = icmp ugt <3 x i8> %x, %tmp0
+  ret <3 x i1> %ret
+}
+
 ; ============================================================================ ;
 ; Commutativity tests.
 ; ============================================================================ ;

llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ult-to-icmp-ugt.ll

@@ -91,6 +91,16 @@ define <3 x i1> @p3_vec_splat_undef(<3 x i8> %x) {
   ret <3 x i1> %ret
 }
 
+define <3 x i1> @p3_vec_nonsplat_undef(<3 x i8> %x) {
+; CHECK-LABEL: @p3_vec_nonsplat_undef(
+; CHECK-NEXT:    [[TMP1:%.*]] = icmp ugt <3 x i8> [[X:%.*]], <i8 7, i8 31, i8 undef>
+; CHECK-NEXT:    ret <3 x i1> [[TMP1]]
+;
+  %tmp0 = and <3 x i8> %x, <i8 7, i8 31, i8 undef>
+  %ret = icmp ult <3 x i8> %tmp0, %x
+  ret <3 x i1> %ret
+}
+
 ; ============================================================================ ;
 ; Commutativity tests.
 ; ============================================================================ ;