[InstCombine][NFC] Precommit new tests

llvm/test/Transforms/InstCombine/insert-extract-shuffle.ll

@@ -692,6 +692,32 @@ define <4 x float> @insert_undemanded_element_op1(<4 x float> %x, <4 x float> %y
   ret <4 x float> %s
 }
 
+define <5 x float> @insert_undemanded_element_unequal_length_op0(<4 x float> %x, <4 x float> %y) {
+; CHECK-LABEL: @insert_undemanded_element_unequal_length_op0(
+; CHECK-NEXT:    [[INS:%.*]] = insertelement <4 x float> [[X:%.*]], float 4.200000e+01, i32 3
+; CHECK-NEXT:    call void @use(<4 x float> [[INS]])
+; CHECK-NEXT:    [[S:%.*]] = shufflevector <4 x float> [[INS]], <4 x float> [[Y:%.*]], <5 x i32> <i32 undef, i32 0, i32 7, i32 1, i32 4>
+; CHECK-NEXT:    ret <5 x float> [[S]]
+;
+  %ins = insertelement <4 x float> %x, float 42.0, i32 3
+  call void @use(<4 x float> %ins)
+  %s = shufflevector <4 x float> %ins, <4 x float> %y, <5 x i32> <i32 undef, i32 0, i32 7, i32 1, i32 4>
+  ret <5 x float> %s
+}
+
+define <5 x float> @insert_undemanded_element_unequal_length_op1(<4 x float> %x, <4 x float> %y) {
+; CHECK-LABEL: @insert_undemanded_element_unequal_length_op1(
+; CHECK-NEXT:    [[INS:%.*]] = insertelement <4 x float> [[X:%.*]], float 4.200000e+01, i32 3
+; CHECK-NEXT:    call void @use(<4 x float> [[INS]])
+; CHECK-NEXT:    [[S:%.*]] = shufflevector <4 x float> [[Y:%.*]], <4 x float> [[INS]], <5 x i32> <i32 undef, i32 3, i32 2, i32 1, i32 4>
+; CHECK-NEXT:    ret <5 x float> [[S]]
+;
+  %ins = insertelement <4 x float> %x, float 42.0, i32 3
+  call void @use(<4 x float> %ins)
+  %s = shufflevector <4 x float> %y, <4 x float> %ins, <5 x i32> <i32 undef, i32 3, i32 2, i32 1, i32 4>
+  ret <5 x float> %s
+}
+
 ; Negative test - shuffle chooses the inserted constant.
 
 define <4 x float> @insert_demanded_element_op0(<4 x float> %x, <4 x float> %y) {
@@ -722,6 +748,36 @@ define <4 x float> @insert_demanded_element_op1(<4 x float> %x, <4 x float> %y)
   ret <4 x float> %s
 }
 
+; Negative test - shuffle chooses the inserted constant.
+
+define <5 x float> @insert_demanded_element_unequal_length_op0(<4 x float> %x, <4 x float> %y) {
+; CHECK-LABEL: @insert_demanded_element_unequal_length_op0(
+; CHECK-NEXT:    [[INS:%.*]] = insertelement <4 x float> [[X:%.*]], float 4.200000e+01, i32 3
+; CHECK-NEXT:    call void @use(<4 x float> [[INS]])
+; CHECK-NEXT:    [[S:%.*]] = shufflevector <4 x float> [[INS]], <4 x float> [[Y:%.*]], <5 x i32> <i32 undef, i32 3, i32 2, i32 1, i32 4>
+; CHECK-NEXT:    ret <5 x float> [[S]]
+;
+  %ins = insertelement <4 x float> %x, float 42.0, i32 3
+  call void @use(<4 x float> %ins)
+  %s = shufflevector <4 x float> %ins, <4 x float> %y, <5 x i32> <i32 undef, i32 3, i32 2, i32 1, i32 4>
+  ret <5 x float> %s
+}
+
+; Negative test - shuffle chooses the inserted constant.
+
+define <5 x float> @insert_demanded_element_unequal_length_op1(<4 x float> %x, <4 x float> %y) {
+; CHECK-LABEL: @insert_demanded_element_unequal_length_op1(
+; CHECK-NEXT:    [[INS:%.*]] = insertelement <4 x float> [[X:%.*]], float 4.300000e+01, i32 3
+; CHECK-NEXT:    call void @use(<4 x float> [[INS]])
+; CHECK-NEXT:    [[S:%.*]] = shufflevector <4 x float> [[Y:%.*]], <4 x float> [[INS]], <5 x i32> <i32 undef, i32 0, i32 7, i32 1, i32 4>
+; CHECK-NEXT:    ret <5 x float> [[S]]
+;
+  %ins = insertelement <4 x float> %x, float 43.0, i32 3
+  call void @use(<4 x float> %ins)
+  %s = shufflevector <4 x float> %y, <4 x float> %ins, <5 x i32> <i32 undef, i32 0, i32 7, i32 1, i32 4>
+  ret <5 x float> %s
+}
+
 define <4 x float> @splat_constant(<4 x float> %x) {
 ; CHECK-LABEL: @splat_constant(
 ; CHECK-NEXT:    [[INS3:%.*]] = insertelement <4 x float> [[X:%.*]], float 3.000000e+00, i32 3