1 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
5 ; RUN: opt < %s -instcombine -S | FileCheck %s
7 define i32 @test1(i32 %A) {
10 ; CHECK-LABEL: @test1(
14 define i32 @test2(i32 %A) {
17 ; CHECK-LABEL: @test2(
21 define i32 @test3(i32 %A) {
25 ; CHECK-LABEL: @test3(
29 define i32 @test4(i32 %A, i32 %x) {
33 ; CHECK-LABEL: @test4(
34 ; CHECK: %C = add i32 %x, %A
38 define i32 @test5(i32 %A, i32 %B, i32 %C) {
42 ; CHECK-LABEL: @test5(
43 ; CHECK: %D1 = sub i32 %C, %B
48 define i32 @test6(i32 %A, i32 %B) {
52 ; CHECK-LABEL: @test6(
53 ; CHECK-NEXT: xor i32 %B, -1
54 ; CHECK-NEXT: %D = and i32
55 ; CHECK-NEXT: ret i32 %D
58 define i32 @test7(i32 %A) {
61 ; CHECK-LABEL: @test7(
62 ; CHECK: %B = xor i32 %A, -1
66 define i32 @test8(i32 %A) {
70 ; CHECK-LABEL: @test8(
71 ; CHECK: %C = shl i32 %A, 3
75 define i32 @test9(i32 %A) {
79 ; CHECK-LABEL: @test9(
80 ; CHECK: %C = mul i32 %A, -2
84 define i32 @test10(i32 %A, i32 %B) {
89 ; CHECK-LABEL: @test10(
90 ; CHECK: %E = mul i32 %A, %B
94 define i32 @test10a(i32 %A) {
98 ; CHECK-LABEL: @test10a(
99 ; CHECK: %E = mul i32 %A, -7
103 define i1 @test11(i8 %A, i8 %B) {
105 %cD = icmp ne i8 %C, 0
107 ; CHECK-LABEL: @test11(
108 ; CHECK: %cD = icmp ne i8 %A, %B
112 define i32 @test12(i32 %A) {
116 ; CHECK-LABEL: @test12(
117 ; CHECK: %C = lshr i32 %A, 31
121 define i32 @test13(i32 %A) {
125 ; CHECK-LABEL: @test13(
126 ; CHECK: %C = ashr i32 %A, 31
130 define i32 @test14(i32 %A) {
132 %C = bitcast i32 %B to i32
135 ; CHECK-LABEL: @test14(
136 ; CHECK: %D = ashr i32 %A, 31
140 define i32 @test15(i32 %A, i32 %B) {
144 ; CHECK-LABEL: @test15(
145 ; CHECK: %D = srem i32 %B, %A
149 define i32 @test16(i32 %A) {
150 %X = sdiv i32 %A, 1123
153 ; CHECK-LABEL: @test16(
154 ; CHECK: %Y = sdiv i32 %A, -1123
158 ; Can't fold subtract here because negation it might oveflow.
160 define i32 @test17(i32 %A) {
162 %C = sdiv i32 %B, 1234
164 ; CHECK-LABEL: @test17(
165 ; CHECK: %B = sub i32 0, %A
166 ; CHECK: %C = sdiv i32 %B, 1234
170 define i64 @test18(i64 %Y) {
171 %tmp.4 = shl i64 %Y, 2
172 %tmp.12 = shl i64 %Y, 2
173 %tmp.8 = sub i64 %tmp.4, %tmp.12
175 ; CHECK-LABEL: @test18(
179 define i32 @test19(i32 %X, i32 %Y) {
183 ; CHECK-LABEL: @test19(
187 define i1 @test20(i32 %g, i32 %h) {
188 %tmp.2 = sub i32 %g, %h
189 %tmp.4 = icmp ne i32 %tmp.2, %g
191 ; CHECK-LABEL: @test20(
192 ; CHECK: %tmp.4 = icmp ne i32 %h, 0
193 ; CHECK: ret i1 %tmp.4
196 define i1 @test21(i32 %g, i32 %h) {
197 %tmp.2 = sub i32 %g, %h
198 %tmp.4 = icmp ne i32 %tmp.2, %g
200 ; CHECK-LABEL: @test21(
201 ; CHECK: %tmp.4 = icmp ne i32 %h, 0
202 ; CHECK: ret i1 %tmp.4
206 define zeroext i1 @test22(i32 %a, i32 %b) nounwind {
207 %tmp2 = sub i32 0, %a
208 %tmp4 = sub i32 0, %b
209 %tmp5 = icmp eq i32 %tmp2, %tmp4
211 ; CHECK-LABEL: @test22(
212 ; CHECK: %tmp5 = icmp eq i32 %b, %a
213 ; CHECK: ret i1 %tmp5
217 define i32 @test23(i8* %P, i64 %A){
218 %B = getelementptr inbounds i8* %P, i64 %A
219 %C = ptrtoint i8* %B to i64
220 %D = trunc i64 %C to i32
221 %E = ptrtoint i8* %P to i64
222 %F = trunc i64 %E to i32
225 ; CHECK-LABEL: @test23(
226 ; CHECK-NEXT: = trunc i64 %A to i32
227 ; CHECK-NEXT: ret i32
230 define i64 @test24(i8* %P, i64 %A){
231 %B = getelementptr inbounds i8* %P, i64 %A
232 %C = ptrtoint i8* %B to i64
233 %E = ptrtoint i8* %P to i64
236 ; CHECK-LABEL: @test24(
237 ; CHECK-NEXT: ret i64 %A
240 define i64 @test24a(i8* %P, i64 %A){
241 %B = getelementptr inbounds i8* %P, i64 %A
242 %C = ptrtoint i8* %B to i64
243 %E = ptrtoint i8* %P to i64
246 ; CHECK-LABEL: @test24a(
247 ; CHECK-NEXT: sub i64 0, %A
248 ; CHECK-NEXT: ret i64
251 @Arr = external global [42 x i16]
253 define i64 @test24b(i8* %P, i64 %A){
254 %B = getelementptr inbounds [42 x i16]* @Arr, i64 0, i64 %A
255 %C = ptrtoint i16* %B to i64
256 %G = sub i64 %C, ptrtoint ([42 x i16]* @Arr to i64)
258 ; CHECK-LABEL: @test24b(
259 ; CHECK-NEXT: shl nuw i64 %A, 1
260 ; CHECK-NEXT: ret i64
264 define i64 @test25(i8* %P, i64 %A){
265 %B = getelementptr inbounds [42 x i16]* @Arr, i64 0, i64 %A
266 %C = ptrtoint i16* %B to i64
267 %G = sub i64 %C, ptrtoint (i16* getelementptr ([42 x i16]* @Arr, i64 1, i64 0) to i64)
269 ; CHECK-LABEL: @test25(
270 ; CHECK-NEXT: shl nuw i64 %A, 1
271 ; CHECK-NEXT: add i64 {{.*}}, -84
272 ; CHECK-NEXT: ret i64
275 define i32 @test26(i32 %x) {
277 %neg = sub i32 0, %shl
279 ; CHECK-LABEL: @test26(
280 ; CHECK-NEXT: shl i32 -3
281 ; CHECK-NEXT: ret i32
284 define i32 @test27(i32 %x, i32 %y) {
285 %mul = mul i32 %y, -8
286 %sub = sub i32 %x, %mul
288 ; CHECK-LABEL: @test27(
289 ; CHECK-NEXT: shl i32 %y, 3
290 ; CHECK-NEXT: add i32
291 ; CHECK-NEXT: ret i32
294 define i32 @test28(i32 %x, i32 %y, i32 %z) {
296 %mul = mul i32 %neg, %y
297 %sub = sub i32 %x, %mul
299 ; CHECK-LABEL: @test28(
300 ; CHECK-NEXT: mul i32 %z, %y
301 ; CHECK-NEXT: add i32
302 ; CHECK-NEXT: ret i32
305 define i64 @test29(i8* %foo, i64 %i, i64 %j) {
306 %gep1 = getelementptr inbounds i8* %foo, i64 %i
307 %gep2 = getelementptr inbounds i8* %foo, i64 %j
308 %cast1 = ptrtoint i8* %gep1 to i64
309 %cast2 = ptrtoint i8* %gep2 to i64
310 %sub = sub i64 %cast1, %cast2
312 ; CHECK-LABEL: @test29(
313 ; CHECK-NEXT: sub i64 %i, %j
314 ; CHECK-NEXT: ret i64
317 define i64 @test30(i8* %foo, i64 %i, i64 %j) {
318 %bit = bitcast i8* %foo to i32*
319 %gep1 = getelementptr inbounds i32* %bit, i64 %i
320 %gep2 = getelementptr inbounds i8* %foo, i64 %j
321 %cast1 = ptrtoint i32* %gep1 to i64
322 %cast2 = ptrtoint i8* %gep2 to i64
323 %sub = sub i64 %cast1, %cast2
325 ; CHECK-LABEL: @test30(
326 ; CHECK-NEXT: %gep1.idx = shl nuw i64 %i, 2
327 ; CHECK-NEXT: sub i64 %gep1.idx, %j
328 ; CHECK-NEXT: ret i64