1 ; RUN: opt -passes='function(loop-vectorize,require<access-info>)' -disable-output -pass-remarks-analysis=loop-vectorize < %s 2>&1 | FileCheck %s
2 ; RUN: opt < %s -passes='function(require<access-info>,loop-vectorize)' -o /dev/null -pass-remarks-output=%t.yaml
3 ; RUN: cat %t.yaml | FileCheck -check-prefix=YAML %s
5 target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
7 ; // Loop has an array element B[i] (%arrayidx in IR) being used as index to
8 ; // another array (A), and since the value of B[i] is unknown,
9 ; // the bound for array A is unknown.
10 ; void test_unknown_bounds(int n, int* A, int* B) {
11 ; for(int i = 0; i < n ; ++i)
15 ; CHECK: remark: source.c:4:16: loop not vectorized: cannot identify array bounds
17 define void @test_unknown_bounds(i64 %n, ptr nocapture %A, ptr nocapture readonly %B) !dbg !13 {
19 %cmp10 = icmp sgt i64 %n, 0
20 br i1 %cmp10, label %for.body, label %for.cond.cleanup
22 for.body: ; preds = %entry, %for.body
23 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
24 %arrayidx = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
25 %0 = load i32, ptr %arrayidx, align 4
26 %idxprom1 = sext i32 %0 to i64, !dbg !35
27 %arrayidx2 = getelementptr inbounds i32, ptr %A, i64 %idxprom1, !dbg !35
28 %1 = load i32, ptr %arrayidx2, align 4, !dbg !35
29 %add = add nsw i32 %1, 1
30 %arrayidx4 = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
31 store i32 %add, ptr %arrayidx4, align 4
32 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
33 %exitcond.not = icmp eq i64 %indvars.iv.next, %n
34 br i1 %exitcond.not, label %for.cond.cleanup, label %for.body, !dbg !28
36 for.cond.cleanup: ; preds = %for.body, %entry
40 ; // a) Dependence::NoDep
41 ; // Loop containing only reads (here of the array A) does not hinder vectorization
42 ; void test_nodep(int n, int* A, int* B) {
43 ; for(int i = 1; i < n ; ++i) {
44 ; B[i] = A[i-1] + A[i+2];
48 ; CHECK-NOT: remark: source.c:{{0-9]+}}:{{[0-9]+}}:
50 define void @test_nodep(i64 %n, ptr nocapture readonly %A, ptr nocapture %B) !dbg !44 {
52 %cmp12 = icmp sgt i64 %n, 1
53 br i1 %cmp12, label %for.body, label %for.cond.cleanup
55 for.body: ; preds = %entry, %for.body
56 %indvars.iv = phi i64 [ 1, %entry ], [ %indvars.iv.next, %for.body ]
57 %0 = add nsw i64 %indvars.iv, -1
58 %arrayidx = getelementptr inbounds i32, ptr %A, i64 %0, !dbg !61
59 %1 = load i32, ptr %arrayidx, align 4, !dbg !61
60 %2 = add nuw nsw i64 %indvars.iv, 2
61 %arrayidx2 = getelementptr inbounds i32, ptr %A, i64 %2, !dbg !63
62 %3 = load i32, ptr %arrayidx2, align 4, !dbg !63
63 %add3 = add nsw i32 %3, %1
64 %arrayidx5 = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
65 store i32 %add3, ptr %arrayidx5, align 4
66 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
67 %exitcond.not = icmp eq i64 %indvars.iv.next, %n
68 br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
70 for.cond.cleanup: ; preds = %for.body, %entry
75 ; // b) Dependence::Forward
76 ; // Loop gets vectorized since it contains only a forward
77 ; // dependency between A[i-2] and A[i]
78 ; void test_forward(int n, int* A, int* B) {
79 ; for(int i=1; i < n; ++i) {
85 ; CHECK-NOT: remark: source.c:{{0-9]+}}:{{[0-9]+}}:
86 define dso_local void @test_forward(i64 %n, ptr nocapture %A, ptr nocapture %B) !dbg !70 {
88 %cmp11 = icmp sgt i64 %n, 1
89 br i1 %cmp11, label %for.body, label %for.cond.cleanup, !dbg !81
91 for.body: ; preds = %entry, %for.body
92 %indvars.iv = phi i64 [ 1, %entry ], [ %indvars.iv.next, %for.body ]
93 %arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv, !dbg !83
94 store i32 10, ptr %arrayidx, align 4
95 %0 = add nsw i64 %indvars.iv, -2
96 %arrayidx2 = getelementptr inbounds i32, ptr %A, i64 %0, !dbg !87
97 %1 = load i32, ptr %arrayidx2, align 4, !dbg !87
98 %arrayidx4 = getelementptr inbounds i32, ptr %B, i64 %indvars.iv, !dbg !88
99 store i32 %1, ptr %arrayidx4, align 4, !dbg !89
100 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
101 %exitcond.not = icmp eq i64 %indvars.iv.next, %n
102 br i1 %exitcond.not, label %for.cond.cleanup, label %for.body, !dbg !81
104 for.cond.cleanup: ; preds = %for.body, %entry
109 ; // c) Dependence::BackwardVectorizable
110 ; // Loop gets vectorized since it contains a backward dependency
111 ; // between A[i] and A[i-4], but the dependency distance (4) is
112 ; // greater than the minimum possible VF (2 in this case)
113 ; void test_backwardVectorizable(int n, int* A) {
114 ; for(int i=4; i < n; ++i) {
119 ; CHECK-NOT: remark: source.c:{{0-9]+}}:{{[0-9]+}}:
121 define dso_local void @test_backwardVectorizable(i64 %n, ptr nocapture %A) !dbg !93 {
123 %cmp8 = icmp sgt i64 %n, 4
124 br i1 %cmp8, label %for.body, label %for.cond.cleanup
126 for.body: ; preds = %entry, %for.body
127 %indvars.iv = phi i64 [ 4, %entry ], [ %indvars.iv.next, %for.body ]
128 %0 = add nsw i64 %indvars.iv, -4, !dbg !106
129 %arrayidx = getelementptr inbounds i32, ptr %A, i64 %0, !dbg !108
130 %1 = load i32, ptr %arrayidx, align 4, !dbg !108
131 %add = add nsw i32 %1, 1
132 %arrayidx2 = getelementptr inbounds i32, ptr %A, i64 %indvars.iv, !dbg !110
133 store i32 %add, ptr %arrayidx2, align 4, !dbg !111
134 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
135 %exitcond.not = icmp eq i64 %indvars.iv.next, %n
136 br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
138 for.cond.cleanup: ; preds = %for.body, %entry
142 ; // d) Dependence::Backward
143 ; // Loop does not get vectorized since it contains a backward
144 ; // dependency between A[i] and A[i+3].
145 ; void test_backward_dep(int n, int *A) {
146 ; for (int i = 1; i <= n - 3; i += 3) {
152 ; CHECK: remark: source.c:48:14: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
153 ; CHECK-NEXT: Backward loop carried data dependence. Memory location is the same as accessed at source.c:47:5
155 define void @test_backward_dep(i64 %n, ptr nocapture %A) {
157 %cmp.not19 = icmp slt i64 %n, 4
158 br i1 %cmp.not19, label %for.cond.cleanup, label %for.body.preheader
160 for.body.preheader: ; preds = %entry
161 %sub = add nsw i64 %n, -3
164 for.body: ; preds = %for.body.preheader, %for.body
165 %indvars.iv = phi i64 [ 1, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
166 %0 = add nsw i64 %indvars.iv, -1
167 %arrayidx = getelementptr inbounds i32, ptr %A, i64 %0
168 %1 = load i32, ptr %arrayidx, align 8
169 %arrayidx3 = getelementptr inbounds i32, ptr %A, i64 %indvars.iv, !dbg !157
170 store i32 %1, ptr %arrayidx3, align 8
171 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 3
172 %arrayidx5 = getelementptr inbounds i32, ptr %A, i64 %indvars.iv.next, !dbg !160
173 %2 = load i32, ptr %arrayidx5, align 8, !dbg !160
174 %3 = add nuw nsw i64 %indvars.iv, 1
175 %arrayidx8 = getelementptr inbounds i32, ptr %A, i64 %3
176 store i32 %2, ptr %arrayidx8, align 8
177 %cmp.not = icmp ugt i64 %indvars.iv.next, %n
178 br i1 %cmp.not, label %for.cond.cleanup, label %for.body
180 for.cond.cleanup: ; preds = %for.body, %entry
184 ; // e) Dependence::ForwardButPreventsForwarding
185 ; // Loop does not get vectorized despite only having a forward
186 ; // dependency between A[i] and A[i-3].
187 ; // This is because the store-to-load forwarding distance (here 3)
188 ; // needs to be a multiple of vector factor otherwise the
189 ; // store (A[5:6] in i=5) and load (A[4:5],A[6:7] in i=7,9) are unaligned.
190 ; void test_forwardButPreventsForwarding_dep(int n, int* A, int* B) {
191 ; for(int i=3; i < n; ++i) {
197 ; CHECK: remark: source.c:61:12: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
198 ; CHECK-NEXT: Forward loop carried data dependence that prevents store-to-load forwarding. Memory location is the same as accessed at source.c:60:5
200 define void @test_forwardButPreventsForwarding_dep(i64 %n, ptr nocapture %A, ptr nocapture %B) !dbg !166 {
202 %cmp11 = icmp sgt i64 %n, 3
203 br i1 %cmp11, label %for.body, label %for.cond.cleanup
205 for.body: ; preds = %entry, %for.body
206 %indvars.iv = phi i64 [ 3, %entry ], [ %indvars.iv.next, %for.body ]
207 %arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv, !dbg !179
208 store i32 10, ptr %arrayidx, align 4
209 %0 = add nsw i64 %indvars.iv, -3
210 %arrayidx2 = getelementptr inbounds i32, ptr %A, i64 %0, !dbg !183
211 %1 = load i32, ptr %arrayidx2, align 4, !dbg !183
212 %arrayidx4 = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
213 store i32 %1, ptr %arrayidx4, align 4
214 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
215 %exitcond.not = icmp eq i64 %indvars.iv.next, %n
216 br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
218 for.cond.cleanup: ; preds = %for.body, %entry
222 ; // f) Dependence::BackwardVectorizableButPreventsForwarding
223 ; // Loop does not get vectorized despite having a backward
224 ; // but vectorizable dependency between A[i] and A[i-15].
226 ; // This is because the store-to-load forwarding distance (here 15)
227 ; // needs to be a multiple of vector factor otherwise
228 ; // store (A[16:17] in i=16) and load (A[15:16], A[17:18] in i=30,32) are unaligned.
229 ; void test_backwardVectorizableButPreventsForwarding(int n, int* A) {
230 ; for(int i=15; i < n; ++i) {
231 ; A[i] = A[i-2] + A[i-15];
235 ; CHECK: remark: source.c:74:5: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
236 ; CHECK: Backward loop carried data dependence that prevents store-to-load forwarding. Memory location is the same as accessed at source.c:74:21
238 define void @test_backwardVectorizableButPreventsForwarding(i64 %n, ptr nocapture %A) !dbg !189 {
240 %cmp13 = icmp sgt i64 %n, 15
241 br i1 %cmp13, label %for.body, label %for.cond.cleanup
243 for.body: ; preds = %entry, %for.body
244 %indvars.iv = phi i64 [ 15, %entry ], [ %indvars.iv.next, %for.body ]
245 %0 = add nsw i64 %indvars.iv, -2
246 %arrayidx = getelementptr inbounds i32, ptr %A, i64 %0
247 %1 = load i32, ptr %arrayidx, align 4
248 %2 = add nsw i64 %indvars.iv, -15
249 %arrayidx3 = getelementptr inbounds i32, ptr %A, i64 %2, !dbg !207
250 %3 = load i32, ptr %arrayidx3, align 4
251 %add = add nsw i32 %3, %1
252 %arrayidx5 = getelementptr inbounds i32, ptr %A, i64 %indvars.iv, !dbg !209
253 store i32 %add, ptr %arrayidx5, align 4, !dbg !209
254 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
255 %exitcond.not = icmp eq i64 %indvars.iv.next, %n
256 br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
258 for.cond.cleanup: ; preds = %for.body, %entry
262 ; // g) Dependence::Unknown
263 ; // Different stride lengths
264 ; void test_unknown_dep(int n, int* A) {
265 ; for(int i=0; i < n; ++i) {
271 ; CHECK: remark: source.c:83:7: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
272 ; CHECK: Unknown data dependence. Memory location is the same as accessed at source.c:82:7
274 define void @test_unknown_dep(i64 %n, ptr nocapture %A) !dbg !214 {
276 %cmp8 = icmp sgt i64 %n, 0
277 br i1 %cmp8, label %for.body, label %for.cond.cleanup
279 for.body: ; preds = %entry, %for.body
280 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
281 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
282 %0 = shl nsw i64 %indvars.iv.next, 2
283 %arrayidx = getelementptr inbounds i32, ptr %A, i64 %0, !dbg !229
284 store i32 10, ptr %arrayidx, align 4
285 %arrayidx2 = getelementptr inbounds i32, ptr %A, i64 %indvars.iv, !dbg !231
286 store i32 100, ptr %arrayidx2, align 4, !dbg !231
287 %exitcond.not = icmp eq i64 %indvars.iv.next, %n
288 br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
290 for.cond.cleanup: ; preds = %for.body, %entry
294 ; YAML: --- !Analysis
295 ; YAML-NEXT: Pass: loop-vectorize
296 ; YAML-NEXT: Name: CantIdentifyArrayBounds
297 ; YAML-NEXT: DebugLoc: { File: source.c, Line: 4, Column: 16 }
298 ; YAML-NEXT: Function: test_unknown_bounds
300 ; YAML-NEXT: - String: 'loop not vectorized: '
301 ; YAML-NEXT: - String: cannot identify array bounds
303 ; YAML-NEXT: --- !Missed
304 ; YAML-NEXT: Pass: loop-vectorize
305 ; YAML-NEXT: Name: MissedDetails
306 ; YAML-NEXT: DebugLoc: { File: source.c, Line: 3, Column: 5 }
307 ; YAML-NEXT: Function: test_unknown_bounds
309 ; YAML-NEXT: - String: loop not vectorized
311 ; YAML: --- !Analysis
312 ; YAML-NEXT: Pass: loop-vectorize
313 ; YAML-NEXT: Name: UnsafeDep
314 ; YAML-NEXT: DebugLoc: { File: source.c, Line: 48, Column: 14 }
315 ; YAML-NEXT: Function: test_backward_dep
317 ; YAML-NEXT: - String: 'loop not vectorized: '
318 ; YAML-NEXT: - String: 'unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop'
319 ; YAML-NEXT: - String: "\nBackward loop carried data dependence."
320 ; YAML-NEXT: - String: ' Memory location is the same as accessed at '
321 ; YAML-NEXT: - Location: 'source.c:47:5'
322 ; YAML-NEXT: DebugLoc: { File: source.c, Line: 47, Column: 5 }
324 ; YAML-NEXT: --- !Missed
325 ; YAML-NEXT: Pass: loop-vectorize
326 ; YAML-NEXT: Name: MissedDetails
327 ; YAML-NEXT: Function: test_backward_dep
329 ; YAML-NEXT: - String: loop not vectorized
331 ; YAML-NEXT: --- !Analysis
332 ; YAML-NEXT: Pass: loop-vectorize
333 ; YAML-NEXT: Name: UnsafeDep
334 ; YAML-NEXT: DebugLoc: { File: source.c, Line: 61, Column: 12 }
335 ; YAML-NEXT: Function: test_forwardButPreventsForwarding_dep
337 ; YAML-NEXT: - String: 'loop not vectorized: '
338 ; YAML-NEXT: - String: 'unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop'
339 ; YAML-NEXT: - String: "\nForward loop carried data dependence that prevents store-to-load forwarding."
340 ; YAML-NEXT: - String: ' Memory location is the same as accessed at '
341 ; YAML-NEXT: - Location: 'source.c:60:5'
342 ; YAML-NEXT: DebugLoc: { File: source.c, Line: 60, Column: 5 }
344 ; YAML-NEXT: --- !Missed
345 ; YAML-NEXT: Pass: loop-vectorize
346 ; YAML-NEXT: Name: MissedDetails
347 ; YAML-NEXT: Function: test_forwardButPreventsForwarding_dep
349 ; YAML-NEXT: - String: loop not vectorized
351 ; YAML-NEXT: --- !Analysis
352 ; YAML-NEXT: Pass: loop-vectorize
353 ; YAML-NEXT: Name: UnsafeDep
354 ; YAML-NEXT: DebugLoc: { File: source.c, Line: 74, Column: 5 }
355 ; YAML-NEXT: Function: test_backwardVectorizableButPreventsForwarding
357 ; YAML-NEXT: - String: 'loop not vectorized: '
358 ; YAML-NEXT: - String: 'unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop'
359 ; YAML-NEXT: - String: "\nBackward loop carried data dependence that prevents store-to-load forwarding."
360 ; YAML-NEXT: - String: ' Memory location is the same as accessed at '
361 ; YAML-NEXT: - Location: 'source.c:74:21'
362 ; YAML-NEXT: DebugLoc: { File: source.c, Line: 74, Column: 21 }
364 ; YAML-NEXT: --- !Missed
365 ; YAML-NEXT: Pass: loop-vectorize
366 ; YAML-NEXT: Name: MissedDetails
367 ; YAML-NEXT: Function: test_backwardVectorizableButPreventsForwarding
369 ; YAML-NEXT: - String: loop not vectorized
371 ; YAML-NEXT: --- !Analysis
372 ; YAML-NEXT: Pass: loop-vectorize
373 ; YAML-NEXT: Name: UnsafeDep
374 ; YAML-NEXT: DebugLoc: { File: source.c, Line: 83, Column: 7 }
375 ; YAML-NEXT: Function: test_unknown_dep
377 ; YAML-NEXT: - String: 'loop not vectorized: '
378 ; YAML-NEXT: - String: 'unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop'
379 ; YAML-NEXT: - String: "\nUnknown data dependence."
380 ; YAML-NEXT: - String: ' Memory location is the same as accessed at '
381 ; YAML-NEXT: - Location: 'source.c:82:7'
382 ; YAML-NEXT: DebugLoc: { File: source.c, Line: 82, Column: 7 }
384 ; YAML-NEXT: --- !Missed
385 ; YAML-NEXT: Pass: loop-vectorize
386 ; YAML-NEXT: Name: MissedDetails
387 ; YAML-NEXT: Function: test_unknown_dep
389 ; YAML-NEXT: - String: loop not vectorized
394 !llvm.module.flags = !{!4}
396 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 14.0.0 (https://github.com/llvm/llvm-project.git 54f0f826c5c7d0ff16c230b259cb6aad33e18d97)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
397 !1 = !DIFile(filename: "source.c", directory: "")
399 !4 = !{i32 2, !"Debug Info Version", i32 3}
400 !13 = distinct !DISubprogram(name: "test_unknown_bounds", scope: !1, file: !1, line: 2, type: !45, scopeLine: 2, unit: !0, retainedNodes: !2)
401 !23 = distinct !DILexicalBlock(scope: !13, file: !1, line: 3, column: 5)
402 !27 = distinct !DILexicalBlock(scope: !23, file: !1, line: 3, column: 5)
403 !28 = !DILocation(line: 3, column: 5, scope: !23)
404 !35 = !DILocation(line: 4, column: 16, scope: !27)
405 !44 = distinct !DISubprogram(name: "test_nodep", scope: !1, file: !1, line: 14, type: !45, scopeLine: 14, unit: !0, retainedNodes: !2)
406 !45 = !DISubroutineType(types: !46)
407 !46 = !{null, !18, !16, !16}
408 !16 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !17, size: 64)
409 !17 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
410 !18 = !DIBasicType(name: "int", size: 64, encoding: DW_ATE_signed)
411 !52 = distinct !DILexicalBlock(scope: !44, file: !1, line: 15, column: 3)
412 !56 = distinct !DILexicalBlock(scope: !52, file: !1, line: 15, column: 3)
413 !60 = distinct !DILexicalBlock(scope: !56, file: !1, line: 15, column: 31)
414 !61 = !DILocation(line: 16, column: 12, scope: !60)
415 !63 = !DILocation(line: 16, column: 21, scope: !60)
416 !70 = distinct !DISubprogram(name: "test_forward", scope: !1, file: !1, line: 24, type: !45, scopeLine: 24, unit: !0, retainedNodes: !2)
417 !77 = distinct !DILexicalBlock(scope: !70, file: !1, line: 25, column: 3)
418 !80 = distinct !DILexicalBlock(scope: !77, file: !1, line: 25, column: 3)
419 !81 = !DILocation(line: 25, column: 3, scope: !77)
420 !83 = !DILocation(line: 26, column: 5, scope: !84)
421 !84 = distinct !DILexicalBlock(scope: !80, file: !1, line: 25, column: 28)
422 !87 = !DILocation(line: 27, column: 12, scope: !84)
423 !88 = !DILocation(line: 27, column: 5, scope: !84)
424 !89 = !DILocation(line: 27, column: 10, scope: !84)
425 !93 = distinct !DISubprogram(name: "test_backwardVectorizable", scope: !1, file: !1, line: 36, type: !95, scopeLine: 36, unit: !0, retainedNodes: !2)
426 !95 = !DISubroutineType(types: !96)
427 !96 = !{null, !18, !16}
428 !99 = distinct !DILexicalBlock(scope: !93, file: !1, line: 37, column: 3)
429 !103 = distinct !DILexicalBlock(scope: !99, file: !1, line: 37, column: 3)
430 !106 = !DILocation(line: 38, column: 15, scope: !107)
431 !107 = distinct !DILexicalBlock(scope: !103, file: !1, line: 37, column: 28)
432 !108 = !DILocation(line: 38, column: 12, scope: !107)
433 !110 = !DILocation(line: 38, column: 5, scope: !107)
434 !111 = !DILocation(line: 38, column: 10, scope: !107)
435 !136 = distinct !DISubprogram(name: "test_backward_dep", scope: !1, file: !1, line: 45, type: !95, scopeLine: 45, unit: !0, retainedNodes: !2)
436 !145 = distinct !DILexicalBlock(scope: !136, file: !1, line: 46, column: 3)
437 !149 = distinct !DILexicalBlock(scope: !145, file: !1, line: 46, column: 3)
438 !153 = distinct !DILexicalBlock(scope: !149, file: !1, line: 46, column: 39)
439 !157 = !DILocation(line: 47, column: 5, scope: !153)
440 !160 = !DILocation(line: 48, column: 14, scope: !153)
441 !166 = distinct !DISubprogram(name: "test_forwardButPreventsForwarding_dep", scope: !1, file: !1, line: 58, type: !45, scopeLine: 58, unit: !0, retainedNodes: !2)
442 !172 = distinct !DILexicalBlock(scope: !166, file: !1, line: 59, column: 3)
443 !176 = distinct !DILexicalBlock(scope: !172, file: !1, line: 59, column: 3)
444 !179 = !DILocation(line: 60, column: 5, scope: !180)
445 !180 = distinct !DILexicalBlock(scope: !176, file: !1, line: 59, column: 28)
446 !183 = !DILocation(line: 61, column: 12, scope: !180)
447 !189 = distinct !DISubprogram(name: "test_backwardVectorizableButPreventsForwarding", scope: !1, file: !1, line: 72, type: !95, scopeLine: 72, unit: !0, retainedNodes: !2)
448 !196 = distinct !DILexicalBlock(scope: !189, file: !1, line: 73, column: 3)
449 !200 = distinct !DILexicalBlock(scope: !196, file: !1, line: 73, column: 3)
450 !204 = distinct !DILexicalBlock(scope: !200, file: !1, line: 73, column: 29)
451 !207 = !DILocation(line: 74, column: 21, scope: !204)
452 !209 = !DILocation(line: 74, column: 5, scope: !204)
453 !214 = distinct !DISubprogram(name: "test_unknown_dep", scope: !1, file: !1, line: 80, type: !95, scopeLine: 80, unit: !0, retainedNodes: !2)
454 !219 = distinct !DILexicalBlock(scope: !214, file: !1, line: 81, column: 3)
455 !223 = distinct !DILexicalBlock(scope: !219, file: !1, line: 81, column: 3)
456 !227 = distinct !DILexicalBlock(scope: !223, file: !1, line: 81, column: 28)
457 !229 = !DILocation(line: 82, column: 7, scope: !227)
458 !231 = !DILocation(line: 83, column: 7, scope: !227)