1 ; This test makes sure that shift instructions are properly eliminated
2 ; even with arbitrary precision integers.
3 ; RUN: opt < %s -instcombine -S | FileCheck %s
7 define i47 @test1(i47 %A) {
8 %B = shl i47 %A, 0 ; <i47> [#uses=1]
12 ; CHECK-LABEL: @test2(
14 define i41 @test2(i7 %X) {
15 %A = zext i7 %X to i41 ; <i41> [#uses=1]
16 %B = shl i41 0, %A ; <i41> [#uses=1]
20 ; CHECK-LABEL: @test3(
22 define i41 @test3(i41 %A) {
23 %B = ashr i41 %A, 0 ; <i41> [#uses=1]
27 ; CHECK-LABEL: @test4(
29 define i39 @test4(i7 %X) {
30 %A = zext i7 %X to i39 ; <i39> [#uses=1]
31 %B = ashr i39 0, %A ; <i39> [#uses=1]
35 ; CHECK-LABEL: @test5(
37 define i55 @test5(i55 %A) {
38 %B = lshr i55 %A, 55 ; <i55> [#uses=1]
42 ; CHECK-LABEL: @test5a(
44 define i32 @test5a(i32 %A) {
45 %B = shl i32 %A, 32 ; <i32> [#uses=1]
49 ; CHECK-LABEL: @test6(
50 ; CHECK: mul i55 %A, 6
51 define i55 @test6(i55 %A) {
52 %B = shl i55 %A, 1 ; <i55> [#uses=1]
53 %C = mul i55 %B, 3 ; <i55> [#uses=1]
57 ; CHECK-LABEL: @test6a(
58 ; CHECK: mul i55 %A, 6
59 define i55 @test6a(i55 %A) {
60 %B = mul i55 %A, 3 ; <i55> [#uses=1]
61 %C = shl i55 %B, 1 ; <i55> [#uses=1]
65 ; CHECK-LABEL: @test7(
67 define i29 @test7(i8 %X) {
68 %A = zext i8 %X to i29 ; <i29> [#uses=1]
69 %B = ashr i29 -1, %A ; <i29> [#uses=1]
73 ; CHECK-LABEL: @test8(
75 define i7 @test8(i7 %A) {
76 %B = shl i7 %A, 4 ; <i7> [#uses=1]
77 %C = shl i7 %B, 3 ; <i7> [#uses=1]
81 ; CHECK-LABEL: @test9(
83 define i17 @test9(i17 %A) {
84 %B = shl i17 %A, 16 ; <i17> [#uses=1]
85 %C = lshr i17 %B, 16 ; <i17> [#uses=1]
89 ; CHECK-LABEL: @test10(
91 define i19 @test10(i19 %A) {
92 %B = lshr i19 %A, 18 ; <i19> [#uses=1]
93 %C = shl i19 %B, 18 ; <i19> [#uses=1]
97 ; CHECK-LABEL: @test11(
98 ; Don't hide the shl from scalar evolution. DAGCombine will get it.
100 define i23 @test11(i23 %A) {
101 %a = mul i23 %A, 3 ; <i23> [#uses=1]
102 %B = lshr i23 %a, 11 ; <i23> [#uses=1]
103 %C = shl i23 %B, 12 ; <i23> [#uses=1]
107 ; CHECK-LABEL: @test12(
109 define i47 @test12(i47 %A) {
110 %B = ashr i47 %A, 8 ; <i47> [#uses=1]
111 %C = shl i47 %B, 8 ; <i47> [#uses=1]
115 ; CHECK-LABEL: @test13(
116 ; Don't hide the shl from scalar evolution. DAGCombine will get it.
118 define i18 @test13(i18 %A) {
119 %a = mul i18 %A, 3 ; <i18> [#uses=1]
120 %B = ashr i18 %a, 8 ; <i18> [#uses=1]
121 %C = shl i18 %B, 9 ; <i18> [#uses=1]
125 ; CHECK-LABEL: @test14(
127 define i35 @test14(i35 %A) {
128 %B = lshr i35 %A, 4 ; <i35> [#uses=1]
129 %C = or i35 %B, 1234 ; <i35> [#uses=1]
130 %D = shl i35 %C, 4 ; <i35> [#uses=1]
134 ; CHECK-LABEL: @test14a(
136 define i79 @test14a(i79 %A) {
137 %B = shl i79 %A, 4 ; <i79> [#uses=1]
138 %C = and i79 %B, 1234 ; <i79> [#uses=1]
139 %D = lshr i79 %C, 4 ; <i79> [#uses=1]
143 ; CHECK-LABEL: @test15(
145 define i45 @test15(i1 %C) {
146 %A = select i1 %C, i45 3, i45 1 ; <i45> [#uses=1]
147 %V = shl i45 %A, 2 ; <i45> [#uses=1]
151 ; CHECK-LABEL: @test15a(
153 define i53 @test15a(i1 %X) {
154 %A = select i1 %X, i8 3, i8 1 ; <i8> [#uses=1]
155 %B = zext i8 %A to i53 ; <i53> [#uses=1]
156 %V = shl i53 64, %B ; <i53> [#uses=1]
160 ; CHECK-LABEL: @test16(
162 define i1 @test16(i84 %X) {
163 %tmp.3 = ashr i84 %X, 4 ; <i84> [#uses=1]
164 %tmp.6 = and i84 %tmp.3, 1 ; <i84> [#uses=1]
165 %tmp.7 = icmp ne i84 %tmp.6, 0 ; <i1> [#uses=1]
169 ; CHECK-LABEL: @test17(
171 define i1 @test17(i106 %A) {
172 %B = lshr i106 %A, 3 ; <i106> [#uses=1]
173 %C = icmp eq i106 %B, 1234 ; <i1> [#uses=1]
177 ; CHECK-LABEL: @test18(
179 define i1 @test18(i11 %A) {
180 %B = lshr i11 %A, 10 ; <i11> [#uses=1]
181 %C = icmp eq i11 %B, 123 ; <i1> [#uses=1]
185 ; CHECK-LABEL: @test19(
187 define i1 @test19(i37 %A) {
188 %B = ashr i37 %A, 2 ; <i37> [#uses=1]
189 %C = icmp eq i37 %B, 0 ; <i1> [#uses=1]
193 ; CHECK-LABEL: @test19a(
195 define i1 @test19a(i39 %A) {
196 %B = ashr i39 %A, 2 ; <i39> [#uses=1]
197 %C = icmp eq i39 %B, -1 ; <i1> [#uses=1]
201 ; CHECK-LABEL: @test20(
203 define i1 @test20(i13 %A) {
204 %B = ashr i13 %A, 12 ; <i13> [#uses=1]
205 %C = icmp eq i13 %B, 123 ; <i1> [#uses=1]
209 ; CHECK-LABEL: @test21(
211 define i1 @test21(i12 %A) {
212 %B = shl i12 %A, 6 ; <i12> [#uses=1]
213 %C = icmp eq i12 %B, -128 ; <i1> [#uses=1]
217 ; CHECK-LABEL: @test22(
219 define i1 @test22(i14 %A) {
220 %B = shl i14 %A, 7 ; <i14> [#uses=1]
221 %C = icmp eq i14 %B, 0 ; <i1> [#uses=1]
225 ; CHECK-LABEL: @test23(
227 define i11 @test23(i44 %A) {
228 %B = shl i44 %A, 33 ; <i44> [#uses=1]
229 %C = ashr i44 %B, 33 ; <i44> [#uses=1]
230 %D = trunc i44 %C to i11 ; <i8> [#uses=1]
234 ; CHECK-LABEL: @test25(
236 define i37 @test25(i37 %tmp.2, i37 %AA) {
237 %x = lshr i37 %AA, 17 ; <i37> [#uses=1]
238 %tmp.3 = lshr i37 %tmp.2, 17 ; <i37> [#uses=1]
239 %tmp.5 = add i37 %tmp.3, %x ; <i37> [#uses=1]
240 %tmp.6 = shl i37 %tmp.5, 17 ; <i37> [#uses=1]
244 ; CHECK-LABEL: @test26(
246 define i40 @test26(i40 %A) {
247 %B = lshr i40 %A, 1 ; <i40> [#uses=1]
248 %C = bitcast i40 %B to i40 ; <i40> [#uses=1]
249 %D = shl i40 %C, 1 ; <i40> [#uses=1]