1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -instcombine -instcombine-infinite-loop-threshold=3 -S < %s | FileCheck %s
4 %struct1 = type { %struct2*, i32, i32, i32 }
5 %struct2 = type { i32, i32 }
6 %struct3 = type { i32, %struct4, %struct4 }
7 %struct4 = type { %struct2, %struct2 }
9 define i32 @test1(%struct1* %dm, i1 %tmp4, i64 %tmp9, i64 %tmp19) {
10 ; CHECK-LABEL: @test1(
12 ; CHECK-NEXT: [[TMP:%.*]] = getelementptr inbounds [[STRUCT1:%.*]], %struct1* [[DM:%.*]], i64 0, i32 0
13 ; CHECK-NEXT: [[TMP1:%.*]] = load %struct2*, %struct2** [[TMP]], align 8
14 ; CHECK-NEXT: br i1 [[TMP4:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
16 ; CHECK-NEXT: [[TMP11:%.*]] = getelementptr inbounds [[STRUCT2:%.*]], %struct2* [[TMP1]], i64 [[TMP9:%.*]], i32 0
17 ; CHECK-NEXT: store i32 0, i32* [[TMP11]], align 4
18 ; CHECK-NEXT: br label [[BB3:%.*]]
20 ; CHECK-NEXT: [[TMP21:%.*]] = getelementptr inbounds [[STRUCT2]], %struct2* [[TMP1]], i64 [[TMP19:%.*]], i32 0
21 ; CHECK-NEXT: store i32 0, i32* [[TMP21]], align 4
22 ; CHECK-NEXT: br label [[BB3]]
24 ; CHECK-NEXT: [[TMP0:%.*]] = phi i64 [ [[TMP9]], [[BB1]] ], [ [[TMP19]], [[BB2]] ]
25 ; CHECK-NEXT: [[TMP24:%.*]] = getelementptr inbounds [[STRUCT2]], %struct2* [[TMP1]], i64 [[TMP0]], i32 1
26 ; CHECK-NEXT: [[TMP25:%.*]] = load i32, i32* [[TMP24]], align 4
27 ; CHECK-NEXT: ret i32 [[TMP25]]
30 %tmp = getelementptr inbounds %struct1, %struct1* %dm, i64 0, i32 0
31 %tmp1 = load %struct2*, %struct2** %tmp, align 8
32 br i1 %tmp4, label %bb1, label %bb2
35 %tmp10 = getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp9
36 %tmp11 = getelementptr inbounds %struct2, %struct2* %tmp10, i64 0, i32 0
37 store i32 0, i32* %tmp11, align 4
41 %tmp20 = getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp19
42 %tmp21 = getelementptr inbounds %struct2, %struct2* %tmp20, i64 0, i32 0
43 store i32 0, i32* %tmp21, align 4
47 %phi = phi %struct2* [ %tmp10, %bb1 ], [ %tmp20, %bb2 ]
48 %tmp24 = getelementptr inbounds %struct2, %struct2* %phi, i64 0, i32 1
49 %tmp25 = load i32, i32* %tmp24, align 4
53 define i32 @test2(%struct1* %dm, i1 %tmp4, i64 %tmp9, i64 %tmp19) {
54 ; CHECK-LABEL: @test2(
56 ; CHECK-NEXT: [[TMP:%.*]] = getelementptr inbounds [[STRUCT1:%.*]], %struct1* [[DM:%.*]], i64 0, i32 0
57 ; CHECK-NEXT: [[TMP1:%.*]] = load %struct2*, %struct2** [[TMP]], align 8
58 ; CHECK-NEXT: [[TMP11:%.*]] = getelementptr inbounds [[STRUCT2:%.*]], %struct2* [[TMP1]], i64 [[TMP9:%.*]], i32 0
59 ; CHECK-NEXT: store i32 0, i32* [[TMP11]], align 4
60 ; CHECK-NEXT: [[TMP21:%.*]] = getelementptr inbounds [[STRUCT2]], %struct2* [[TMP1]], i64 [[TMP19:%.*]], i32 0
61 ; CHECK-NEXT: store i32 0, i32* [[TMP21]], align 4
62 ; CHECK-NEXT: [[TMP24:%.*]] = getelementptr inbounds [[STRUCT2]], %struct2* [[TMP1]], i64 [[TMP9]], i32 1
63 ; CHECK-NEXT: [[TMP25:%.*]] = load i32, i32* [[TMP24]], align 4
64 ; CHECK-NEXT: ret i32 [[TMP25]]
67 %tmp = getelementptr inbounds %struct1, %struct1* %dm, i64 0, i32 0
68 %tmp1 = load %struct2*, %struct2** %tmp, align 8
69 %tmp10 = getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp9
70 %tmp11 = getelementptr inbounds %struct2, %struct2* %tmp10, i64 0, i32 0
71 store i32 0, i32* %tmp11, align 4
72 %tmp20 = getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp19
73 %tmp21 = getelementptr inbounds %struct2, %struct2* %tmp20, i64 0, i32 0
74 store i32 0, i32* %tmp21, align 4
75 %tmp24 = getelementptr inbounds %struct2, %struct2* %tmp10, i64 0, i32 1
76 %tmp25 = load i32, i32* %tmp24, align 4
80 ; Check that instcombine doesn't insert GEPs before landingpad.
82 define i32 @test3(%struct3* %dm, i1 %tmp4, i64 %tmp9, i64 %tmp19, i64 %tmp20, i64 %tmp21) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
83 ; CHECK-LABEL: @test3(
85 ; CHECK-NEXT: br i1 [[TMP4:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
87 ; CHECK-NEXT: [[TMP11:%.*]] = getelementptr inbounds [[STRUCT3:%.*]], %struct3* [[DM:%.*]], i64 [[TMP19:%.*]], i32 1, i32 0, i32 0
88 ; CHECK-NEXT: store i32 0, i32* [[TMP11]], align 4
89 ; CHECK-NEXT: br label [[BB3:%.*]]
91 ; CHECK-NEXT: [[TMP12:%.*]] = getelementptr inbounds [[STRUCT3]], %struct3* [[DM]], i64 [[TMP20:%.*]], i32 1, i32 0, i32 1
92 ; CHECK-NEXT: store i32 0, i32* [[TMP12]], align 4
93 ; CHECK-NEXT: br label [[BB3]]
95 ; CHECK-NEXT: [[TMP0:%.*]] = phi i64 [ [[TMP19]], [[BB1]] ], [ [[TMP20]], [[BB2]] ]
96 ; CHECK-NEXT: [[TMP22:%.*]] = invoke i32 @foo1(i32 11)
97 ; CHECK-NEXT: to label [[BB4:%.*]] unwind label [[BB5:%.*]]
99 ; CHECK-NEXT: ret i32 0
101 ; CHECK-NEXT: [[TMP27:%.*]] = landingpad { i8*, i32 }
102 ; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*)
103 ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [[STRUCT3]], %struct3* [[DM]], i64 [[TMP0]], i32 1
104 ; CHECK-NEXT: [[TMP35:%.*]] = getelementptr inbounds [[STRUCT4:%.*]], %struct4* [[TMP1]], i64 [[TMP21:%.*]], i32 1, i32 1
105 ; CHECK-NEXT: [[TMP25:%.*]] = load i32, i32* [[TMP35]], align 4
106 ; CHECK-NEXT: ret i32 [[TMP25]]
109 %tmp = getelementptr inbounds %struct3, %struct3* %dm, i64 0
110 br i1 %tmp4, label %bb1, label %bb2
113 %tmp1 = getelementptr inbounds %struct3, %struct3* %tmp, i64 %tmp19, i32 1
114 %tmp11 = getelementptr inbounds %struct4, %struct4* %tmp1, i64 0, i32 0, i32 0
115 store i32 0, i32* %tmp11, align 4
119 %tmp2 = getelementptr inbounds %struct3, %struct3* %tmp, i64 %tmp20, i32 1
120 %tmp12 = getelementptr inbounds %struct4, %struct4* %tmp2, i64 0, i32 0, i32 1
121 store i32 0, i32* %tmp12, align 4
125 %phi = phi %struct4* [ %tmp1, %bb1 ], [ %tmp2, %bb2 ]
126 %tmp22 = invoke i32 @foo1(i32 11) to label %bb4 unwind label %bb5
132 %tmp27 = landingpad { i8*, i32 } catch i8* bitcast (i8** @_ZTIi to i8*)
133 %tmp34 = getelementptr inbounds %struct4, %struct4* %phi, i64 %tmp21, i32 1
134 %tmp35 = getelementptr inbounds %struct2, %struct2* %tmp34, i64 0, i32 1
135 %tmp25 = load i32, i32* %tmp35, align 4
139 @_ZTIi = external constant i8*
140 declare i32 @__gxx_personality_v0(...)
141 declare i32 @foo1(i32)
144 ; Check that instcombine doesn't fold GEPs into themselves through a loop
147 define i8* @test4(i32 %value, i8* %buffer) {
148 ; CHECK-LABEL: @test4(
150 ; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[VALUE:%.*]], 127
151 ; CHECK-NEXT: br i1 [[CMP]], label [[LOOP_HEADER:%.*]], label [[EXIT:%.*]]
152 ; CHECK: loop.header:
153 ; CHECK-NEXT: br label [[LOOP_BODY:%.*]]
155 ; CHECK-NEXT: [[BUFFER_PN:%.*]] = phi i8* [ [[BUFFER:%.*]], [[LOOP_HEADER]] ], [ [[LOOPPTR:%.*]], [[LOOP_BODY]] ]
156 ; CHECK-NEXT: [[NEWVAL:%.*]] = phi i32 [ [[VALUE]], [[LOOP_HEADER]] ], [ [[SHR:%.*]], [[LOOP_BODY]] ]
157 ; CHECK-NEXT: [[LOOPPTR]] = getelementptr inbounds i8, i8* [[BUFFER_PN]], i64 1
158 ; CHECK-NEXT: [[SHR]] = lshr i32 [[NEWVAL]], 7
159 ; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 [[NEWVAL]], 16383
160 ; CHECK-NEXT: br i1 [[CMP2]], label [[LOOP_BODY]], label [[LOOP_EXIT:%.*]]
162 ; CHECK-NEXT: br label [[EXIT]]
164 ; CHECK-NEXT: [[TMP0:%.*]] = phi i8* [ [[LOOPPTR]], [[LOOP_EXIT]] ], [ [[BUFFER]], [[ENTRY:%.*]] ]
165 ; CHECK-NEXT: [[INCPTR3:%.*]] = getelementptr inbounds i8, i8* [[TMP0]], i64 2
166 ; CHECK-NEXT: ret i8* [[INCPTR3]]
169 %incptr = getelementptr inbounds i8, i8* %buffer, i64 1
170 %cmp = icmp ugt i32 %value, 127
171 br i1 %cmp, label %loop.header, label %exit
177 %loopptr = phi i8* [ %incptr, %loop.header ], [ %incptr2, %loop.body ]
178 %newval = phi i32 [ %value, %loop.header ], [ %shr, %loop.body ]
179 %shr = lshr i32 %newval, 7
180 %incptr2 = getelementptr inbounds i8, i8* %loopptr, i64 1
181 %cmp2 = icmp ugt i32 %shr, 127
182 br i1 %cmp2, label %loop.body, label %loop.exit
185 %exitptr = phi i8* [ %incptr2, %loop.body ]
189 %ptr2 = phi i8* [ %exitptr, %loop.exit ], [ %incptr, %entry ]
190 %incptr3 = getelementptr inbounds i8, i8* %ptr2, i64 1
194 @.str.4 = external unnamed_addr constant [100 x i8], align 1
196 ; Instcombine shouldn't add new PHI nodes while folding GEPs if that will leave
197 ; old PHI nodes behind as this is not clearly beneficial.
198 define void @test5(i16 *%idx, i8 **%in) #0 {
199 ; CHECK-LABEL: @test5(
201 ; CHECK-NEXT: [[TMP0:%.*]] = load i8*, i8** [[IN:%.*]], align 8
202 ; CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds i8, i8* [[TMP0]], i64 1
203 ; CHECK-NEXT: [[TMP1:%.*]] = load i8, i8* [[INCDEC_PTR]], align 1
204 ; CHECK-NEXT: [[CMP23:%.*]] = icmp eq i8 [[TMP1]], 54
205 ; CHECK-NEXT: br i1 [[CMP23]], label [[WHILE_COND:%.*]], label [[IF_THEN_25:%.*]]
207 ; CHECK-NEXT: call void @g(i8* getelementptr inbounds ([100 x i8], [100 x i8]* @.str.4, i64 0, i64 0))
208 ; CHECK-NEXT: br label [[WHILE_COND]]
210 ; CHECK-NEXT: [[PTR:%.*]] = phi i8* [ [[INCDEC_PTR]], [[ENTRY:%.*]] ], [ [[INCDEC_PTR32:%.*]], [[WHILE_BODY:%.*]] ], [ [[INCDEC_PTR]], [[IF_THEN_25]] ]
211 ; CHECK-NEXT: [[TMP2:%.*]] = load i8, i8* [[PTR]], align 1
212 ; CHECK-NEXT: [[AND:%.*]] = and i8 [[TMP2]], 64
213 ; CHECK-NEXT: [[LNOT:%.*]] = icmp eq i8 [[AND]], 0
214 ; CHECK-NEXT: br i1 [[LNOT]], label [[WHILE_BODY]], label [[WHILE_COND_33:%.*]]
216 ; CHECK-NEXT: [[INCDEC_PTR32]] = getelementptr inbounds i8, i8* [[PTR]], i64 1
217 ; CHECK-NEXT: br label [[WHILE_COND]]
218 ; CHECK: while.cond.33:
219 ; CHECK-NEXT: [[INCDEC_PTR34:%.*]] = getelementptr inbounds i8, i8* [[PTR]], i64 1
220 ; CHECK-NEXT: br label [[WHILE_COND_57:%.*]]
221 ; CHECK: while.cond.57:
222 ; CHECK-NEXT: [[TMP3:%.*]] = load i8, i8* [[INCDEC_PTR34]], align 1
223 ; CHECK-NEXT: [[TMP4:%.*]] = zext i8 [[TMP3]] to i64
224 ; CHECK-NEXT: [[ARRAYIDX61:%.*]] = getelementptr inbounds i16, i16* [[IDX:%.*]], i64 [[TMP4]]
225 ; CHECK-NEXT: [[TMP5:%.*]] = load i16, i16* [[ARRAYIDX61]], align 2
226 ; CHECK-NEXT: [[AND63:%.*]] = and i16 [[TMP5]], 2048
227 ; CHECK-NEXT: [[TOBOOL64:%.*]] = icmp eq i16 [[AND63]], 0
228 ; CHECK-NEXT: br i1 [[TOBOOL64]], label [[WHILE_COND_73:%.*]], label [[WHILE_COND_57]]
229 ; CHECK: while.cond.73:
230 ; CHECK-NEXT: br label [[WHILE_COND_73]]
233 %0 = load i8*, i8** %in
234 %incdec.ptr = getelementptr inbounds i8, i8* %0, i32 1
235 %1 = load i8, i8* %incdec.ptr, align 1
236 %cmp23 = icmp eq i8 %1, 54
237 br i1 %cmp23, label %while.cond, label %if.then.25
240 call void @g(i8* getelementptr inbounds ([100 x i8], [100 x i8]* @.str.4, i32 0, i32 0))
244 %Ptr = phi i8* [ %incdec.ptr, %entry ], [ %incdec.ptr32, %while.body], [%incdec.ptr, %if.then.25 ]
245 %2 = load i8, i8* %Ptr
247 %lnot = icmp eq i8 %and, 0
248 br i1 %lnot, label %while.body, label %while.cond.33
251 %incdec.ptr32 = getelementptr inbounds i8, i8* %Ptr, i32 1
255 %incdec.ptr34 = getelementptr inbounds i8, i8* %Ptr, i32 1
256 br label %while.cond.57
259 %3 = load i8, i8* %incdec.ptr34, align 1
260 %conv59 = zext i8 %3 to i32
261 %arrayidx61 = getelementptr inbounds i16, i16* %idx, i32 %conv59
262 %4 = load i16, i16* %arrayidx61, align 2
263 %and63 = and i16 %4, 2048
264 %tobool64 = icmp eq i16 %and63, 0
265 br i1 %tobool64, label %while.cond.73, label %while.cond.57
268 br label %while.cond.73