1; RUN: opt < %s -default-data-layout="e-p:32:32:32-p1:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-n8:16:32" -basicaa -gvn -S -die | FileCheck %s
2; RUN: opt < %s -default-data-layout="E-p:32:32:32-p1:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-n32"      -basicaa -gvn -S -die | FileCheck %s
3
4;; Trivial RLE test.
5define i32 @test0(i32 %V, i32* %P) {
6  store i32 %V, i32* %P
7
8  %A = load i32* %P
9  ret i32 %A
10; CHECK-LABEL: @test0(
11; CHECK: ret i32 %V
12}
13
14
15;;===----------------------------------------------------------------------===;;
16;; Tests for crashers
17;;===----------------------------------------------------------------------===;;
18
19;; PR5016
20define i8 @crash0({i32, i32} %A, {i32, i32}* %P) {
21  store {i32, i32} %A, {i32, i32}* %P
22  %X = bitcast {i32, i32}* %P to i8*
23  %Y = load i8* %X
24  ret i8 %Y
25}
26
27;; No PR filed, crashed in CaptureTracker.
28declare void @helper()
29define void @crash1() {
30  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* undef, i8* undef, i64 undef, i32 1, i1 false) nounwind
31  %tmp = load i8* bitcast (void ()* @helper to i8*)
32  %x = icmp eq i8 %tmp, 15
33  ret void
34}
35
36
37;;===----------------------------------------------------------------------===;;
38;; Store -> Load  and  Load -> Load forwarding where src and dst are different
39;; types, but where the base pointer is a must alias.
40;;===----------------------------------------------------------------------===;;
41
42;; i32 -> f32 forwarding.
43define float @coerce_mustalias1(i32 %V, i32* %P) {
44  store i32 %V, i32* %P
45
46  %P2 = bitcast i32* %P to float*
47
48  %A = load float* %P2
49  ret float %A
50; CHECK-LABEL: @coerce_mustalias1(
51; CHECK-NOT: load
52; CHECK: ret float
53}
54
55;; i32* -> float forwarding.
56define float @coerce_mustalias2(i32* %V, i32** %P) {
57  store i32* %V, i32** %P
58
59  %P2 = bitcast i32** %P to float*
60
61  %A = load float* %P2
62  ret float %A
63; CHECK-LABEL: @coerce_mustalias2(
64; CHECK-NOT: load
65; CHECK: ret float
66}
67
68;; float -> i32* forwarding.
69define i32* @coerce_mustalias3(float %V, float* %P) {
70  store float %V, float* %P
71
72  %P2 = bitcast float* %P to i32**
73
74  %A = load i32** %P2
75  ret i32* %A
76; CHECK-LABEL: @coerce_mustalias3(
77; CHECK-NOT: load
78; CHECK: ret i32*
79}
80
81;; i32 -> f32 load forwarding.
82define float @coerce_mustalias4(i32* %P, i1 %cond) {
83  %A = load i32* %P
84
85  %P2 = bitcast i32* %P to float*
86  %B = load float* %P2
87  br i1 %cond, label %T, label %F
88T:
89  ret float %B
90
91F:
92  %X = bitcast i32 %A to float
93  ret float %X
94
95; CHECK-LABEL: @coerce_mustalias4(
96; CHECK: %A = load i32* %P
97; CHECK-NOT: load
98; CHECK: ret float
99; CHECK: F:
100}
101
102;; i32 -> i8 forwarding
103define i8 @coerce_mustalias5(i32 %V, i32* %P) {
104  store i32 %V, i32* %P
105
106  %P2 = bitcast i32* %P to i8*
107
108  %A = load i8* %P2
109  ret i8 %A
110; CHECK-LABEL: @coerce_mustalias5(
111; CHECK-NOT: load
112; CHECK: ret i8
113}
114
115;; i64 -> float forwarding
116define float @coerce_mustalias6(i64 %V, i64* %P) {
117  store i64 %V, i64* %P
118
119  %P2 = bitcast i64* %P to float*
120
121  %A = load float* %P2
122  ret float %A
123; CHECK-LABEL: @coerce_mustalias6(
124; CHECK-NOT: load
125; CHECK: ret float
126}
127
128;; i64 -> i8* (32-bit) forwarding
129define i8* @coerce_mustalias7(i64 %V, i64* %P) {
130  store i64 %V, i64* %P
131
132  %P2 = bitcast i64* %P to i8**
133
134  %A = load i8** %P2
135  ret i8* %A
136; CHECK-LABEL: @coerce_mustalias7(
137; CHECK-NOT: load
138; CHECK: ret i8*
139}
140
141; memset -> i16 forwarding.
142define signext i16 @memset_to_i16_local(i16* %A) nounwind ssp {
143entry:
144  %conv = bitcast i16* %A to i8*
145  tail call void @llvm.memset.p0i8.i64(i8* %conv, i8 1, i64 200, i32 1, i1 false)
146  %arrayidx = getelementptr inbounds i16* %A, i64 42
147  %tmp2 = load i16* %arrayidx
148  ret i16 %tmp2
149; CHECK-LABEL: @memset_to_i16_local(
150; CHECK-NOT: load
151; CHECK: ret i16 257
152}
153
154; memset -> float forwarding.
155define float @memset_to_float_local(float* %A, i8 %Val) nounwind ssp {
156entry:
157  %conv = bitcast float* %A to i8*                ; <i8*> [#uses=1]
158  tail call void @llvm.memset.p0i8.i64(i8* %conv, i8 %Val, i64 400, i32 1, i1 false)
159  %arrayidx = getelementptr inbounds float* %A, i64 42 ; <float*> [#uses=1]
160  %tmp2 = load float* %arrayidx                   ; <float> [#uses=1]
161  ret float %tmp2
162; CHECK-LABEL: @memset_to_float_local(
163; CHECK-NOT: load
164; CHECK: zext
165; CHECK-NEXT: shl
166; CHECK-NEXT: or
167; CHECK-NEXT: shl
168; CHECK-NEXT: or
169; CHECK-NEXT: bitcast
170; CHECK-NEXT: ret float
171}
172
173;; non-local memset -> i16 load forwarding.
174define i16 @memset_to_i16_nonlocal0(i16* %P, i1 %cond) {
175  %P3 = bitcast i16* %P to i8*
176  br i1 %cond, label %T, label %F
177T:
178  tail call void @llvm.memset.p0i8.i64(i8* %P3, i8 1, i64 400, i32 1, i1 false)
179  br label %Cont
180
181F:
182  tail call void @llvm.memset.p0i8.i64(i8* %P3, i8 2, i64 400, i32 1, i1 false)
183  br label %Cont
184
185Cont:
186  %P2 = getelementptr i16* %P, i32 4
187  %A = load i16* %P2
188  ret i16 %A
189
190; CHECK-LABEL: @memset_to_i16_nonlocal0(
191; CHECK: Cont:
192; CHECK-NEXT:   %A = phi i16 [ 514, %F ], [ 257, %T ]
193; CHECK-NOT: load
194; CHECK: ret i16 %A
195}
196
197@GCst = constant {i32, float, i32 } { i32 42, float 14., i32 97 }
198@GCst_as1 = addrspace(1) constant {i32, float, i32 } { i32 42, float 14., i32 97 }
199
200; memset -> float forwarding.
201define float @memcpy_to_float_local(float* %A) nounwind ssp {
202entry:
203  %conv = bitcast float* %A to i8*                ; <i8*> [#uses=1]
204  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %conv, i8* bitcast ({i32, float, i32 }* @GCst to i8*), i64 12, i32 1, i1 false)
205  %arrayidx = getelementptr inbounds float* %A, i64 1 ; <float*> [#uses=1]
206  %tmp2 = load float* %arrayidx                   ; <float> [#uses=1]
207  ret float %tmp2
208; CHECK-LABEL: @memcpy_to_float_local(
209; CHECK-NOT: load
210; CHECK: ret float 1.400000e+01
211}
212
213; memcpy from address space 1
214define float @memcpy_to_float_local_as1(float* %A) nounwind ssp {
215entry:
216  %conv = bitcast float* %A to i8*                ; <i8*> [#uses=1]
217  tail call void @llvm.memcpy.p0i8.p1i8.i64(i8* %conv, i8 addrspace(1)* bitcast ({i32, float, i32 } addrspace(1)* @GCst_as1 to i8 addrspace(1)*), i64 12, i32 1, i1 false)
218  %arrayidx = getelementptr inbounds float* %A, i64 1 ; <float*> [#uses=1]
219  %tmp2 = load float* %arrayidx                   ; <float> [#uses=1]
220  ret float %tmp2
221; CHECK-LABEL: @memcpy_to_float_local_as1(
222; CHECK-NOT: load
223; CHECK: ret float 1.400000e+01
224}
225
226;; non-local i32/float -> i8 load forwarding.
227define i8 @coerce_mustalias_nonlocal0(i32* %P, i1 %cond) {
228  %P2 = bitcast i32* %P to float*
229  %P3 = bitcast i32* %P to i8*
230  br i1 %cond, label %T, label %F
231T:
232  store i32 42, i32* %P
233  br label %Cont
234
235F:
236  store float 1.0, float* %P2
237  br label %Cont
238
239Cont:
240  %A = load i8* %P3
241  ret i8 %A
242
243; CHECK-LABEL: @coerce_mustalias_nonlocal0(
244; CHECK: Cont:
245; CHECK:   %A = phi i8 [
246; CHECK-NOT: load
247; CHECK: ret i8 %A
248}
249
250
251;; non-local i32/float -> i8 load forwarding.  This also tests that the "P3"
252;; bitcast equivalence can be properly phi translated.
253define i8 @coerce_mustalias_nonlocal1(i32* %P, i1 %cond) {
254  %P2 = bitcast i32* %P to float*
255  br i1 %cond, label %T, label %F
256T:
257  store i32 42, i32* %P
258  br label %Cont
259
260F:
261  store float 1.0, float* %P2
262  br label %Cont
263
264Cont:
265  %P3 = bitcast i32* %P to i8*
266  %A = load i8* %P3
267  ret i8 %A
268
269; CHECK-LABEL: @coerce_mustalias_nonlocal1(
270; CHECK: Cont:
271; CHECK:   %A = phi i8 [
272; CHECK-NOT: load
273; CHECK: ret i8 %A
274}
275
276
277;; non-local i32 -> i8 partial redundancy load forwarding.
278define i8 @coerce_mustalias_pre0(i32* %P, i1 %cond) {
279  %P3 = bitcast i32* %P to i8*
280  br i1 %cond, label %T, label %F
281T:
282  store i32 42, i32* %P
283  br label %Cont
284
285F:
286  br label %Cont
287
288Cont:
289  %A = load i8* %P3
290  ret i8 %A
291
292; CHECK-LABEL: @coerce_mustalias_pre0(
293; CHECK: F:
294; CHECK:   load i8* %P3
295; CHECK: Cont:
296; CHECK:   %A = phi i8 [
297; CHECK-NOT: load
298; CHECK: ret i8 %A
299}
300
301;;===----------------------------------------------------------------------===;;
302;; Store -> Load  and  Load -> Load forwarding where src and dst are different
303;; types, and the reload is an offset from the store pointer.
304;;===----------------------------------------------------------------------===;;
305
306;; i32 -> i8 forwarding.
307;; PR4216
308define i8 @coerce_offset0(i32 %V, i32* %P) {
309  store i32 %V, i32* %P
310
311  %P2 = bitcast i32* %P to i8*
312  %P3 = getelementptr i8* %P2, i32 2
313
314  %A = load i8* %P3
315  ret i8 %A
316; CHECK-LABEL: @coerce_offset0(
317; CHECK-NOT: load
318; CHECK: ret i8
319}
320
321;; non-local i32/float -> i8 load forwarding.
322define i8 @coerce_offset_nonlocal0(i32* %P, i1 %cond) {
323  %P2 = bitcast i32* %P to float*
324  %P3 = bitcast i32* %P to i8*
325  %P4 = getelementptr i8* %P3, i32 2
326  br i1 %cond, label %T, label %F
327T:
328  store i32 57005, i32* %P
329  br label %Cont
330
331F:
332  store float 1.0, float* %P2
333  br label %Cont
334
335Cont:
336  %A = load i8* %P4
337  ret i8 %A
338
339; CHECK-LABEL: @coerce_offset_nonlocal0(
340; CHECK: Cont:
341; CHECK:   %A = phi i8 [
342; CHECK-NOT: load
343; CHECK: ret i8 %A
344}
345
346
347;; non-local i32 -> i8 partial redundancy load forwarding.
348define i8 @coerce_offset_pre0(i32* %P, i1 %cond) {
349  %P3 = bitcast i32* %P to i8*
350  %P4 = getelementptr i8* %P3, i32 2
351  br i1 %cond, label %T, label %F
352T:
353  store i32 42, i32* %P
354  br label %Cont
355
356F:
357  br label %Cont
358
359Cont:
360  %A = load i8* %P4
361  ret i8 %A
362
363; CHECK-LABEL: @coerce_offset_pre0(
364; CHECK: F:
365; CHECK:   load i8* %P4
366; CHECK: Cont:
367; CHECK:   %A = phi i8 [
368; CHECK-NOT: load
369; CHECK: ret i8 %A
370}
371
372define i32 @chained_load(i32** %p, i32 %x, i32 %y) {
373block1:
374  %A = alloca i32*
375
376  %z = load i32** %p
377  store i32* %z, i32** %A
378  %cmp = icmp eq i32 %x, %y
379  br i1 %cmp, label %block2, label %block3
380
381block2:
382 %a = load i32** %p
383 br label %block4
384
385block3:
386  %b = load i32** %p
387  br label %block4
388
389block4:
390  %c = load i32** %p
391  %d = load i32* %c
392  ret i32 %d
393
394; CHECK-LABEL: @chained_load(
395; CHECK: %z = load i32** %p
396; CHECK-NOT: load
397; CHECK: %d = load i32* %z
398; CHECK-NEXT: ret i32 %d
399}
400
401
402declare i1 @cond() readonly
403declare i1 @cond2() readonly
404
405define i32 @phi_trans2() {
406; CHECK-LABEL: @phi_trans2(
407entry:
408  %P = alloca i32, i32 400
409  br label %F1
410
411F1:
412  %A = phi i32 [1, %entry], [2, %F]
413  %cond2 = call i1 @cond()
414  br i1 %cond2, label %T1, label %TY
415
416T1:
417  %P2 = getelementptr i32* %P, i32 %A
418  %x = load i32* %P2
419  %cond = call i1 @cond2()
420  br i1 %cond, label %TX, label %F
421
422F:
423  %P3 = getelementptr i32* %P, i32 2
424  store i32 17, i32* %P3
425
426  store i32 42, i32* %P2  ; Provides "P[A]".
427  br label %F1
428
429TX:
430  ; This load should not be compiled to 'ret i32 42'.  An overly clever
431  ; implementation of GVN would see that we're returning 17 if the loop
432  ; executes once or 42 if it executes more than that, but we'd have to do
433  ; loop restructuring to expose this, and GVN shouldn't do this sort of CFG
434  ; transformation.
435
436; CHECK: TX:
437; CHECK: ret i32 %x
438  ret i32 %x
439TY:
440  ret i32 0
441}
442
443define i32 @phi_trans3(i32* %p, i32 %x, i32 %y, i32 %z) {
444; CHECK-LABEL: @phi_trans3(
445block1:
446  %cmpxy = icmp eq i32 %x, %y
447  br i1 %cmpxy, label %block2, label %block3
448
449block2:
450 store i32 87, i32* %p
451 br label %block4
452
453block3:
454  %p2 = getelementptr i32* %p, i32 43
455  store i32 97, i32* %p2
456  br label %block4
457
458block4:
459  %A = phi i32 [-1, %block2], [42, %block3]
460  br i1 %cmpxy, label %block5, label %exit
461
462; CHECK: block4:
463; CHECK-NEXT: %D = phi i32 [ 87, %block2 ], [ 97, %block3 ]
464; CHECK-NOT: load
465
466block5:
467  %B = add i32 %A, 1
468  br i1 %cmpxy, label %block6, label %exit
469
470block6:
471  %C = getelementptr i32* %p, i32 %B
472  br i1 %cmpxy, label %block7, label %exit
473
474block7:
475  %D = load i32* %C
476  ret i32 %D
477
478; CHECK: block7:
479; CHECK-NEXT: ret i32 %D
480
481exit:
482  ret i32 -1
483}
484
485define i8 @phi_trans4(i8* %p) {
486; CHECK-LABEL: @phi_trans4(
487entry:
488  %X3 = getelementptr i8* %p, i32 192
489  store i8 192, i8* %X3
490
491  %X = getelementptr i8* %p, i32 4
492  %Y = load i8* %X
493  br label %loop
494
495loop:
496  %i = phi i32 [4, %entry], [192, %loop]
497  %X2 = getelementptr i8* %p, i32 %i
498  %Y2 = load i8* %X2
499
500; CHECK: loop:
501; CHECK-NEXT: %Y2 = phi i8 [ %Y, %entry ], [ 0, %loop ]
502; CHECK-NOT: load i8
503
504  %cond = call i1 @cond2()
505
506  %Z = bitcast i8 *%X3 to i32*
507  store i32 0, i32* %Z
508  br i1 %cond, label %loop, label %out
509
510out:
511  %R = add i8 %Y, %Y2
512  ret i8 %R
513}
514
515define i8 @phi_trans5(i8* %p) {
516; CHECK-LABEL: @phi_trans5(
517entry:
518
519  %X4 = getelementptr i8* %p, i32 2
520  store i8 19, i8* %X4
521
522  %X = getelementptr i8* %p, i32 4
523  %Y = load i8* %X
524  br label %loop
525
526loop:
527  %i = phi i32 [4, %entry], [3, %cont]
528  %X2 = getelementptr i8* %p, i32 %i
529  %Y2 = load i8* %X2  ; Ensure this load is not being incorrectly replaced.
530  %cond = call i1 @cond2()
531  br i1 %cond, label %cont, label %out
532
533cont:
534  %Z = getelementptr i8* %X2, i32 -1
535  %Z2 = bitcast i8 *%Z to i32*
536  store i32 50462976, i32* %Z2  ;; (1 << 8) | (2 << 16) | (3 << 24)
537
538
539; CHECK: store i32
540; CHECK-NEXT: getelementptr i8* %p, i32 3
541; CHECK-NEXT: load i8*
542  br label %loop
543
544out:
545  %R = add i8 %Y, %Y2
546  ret i8 %R
547}
548
549
550; PR6642
551define i32 @memset_to_load() nounwind readnone {
552entry:
553  %x = alloca [256 x i32], align 4                ; <[256 x i32]*> [#uses=2]
554  %tmp = bitcast [256 x i32]* %x to i8*           ; <i8*> [#uses=1]
555  call void @llvm.memset.p0i8.i64(i8* %tmp, i8 0, i64 1024, i32 4, i1 false)
556  %arraydecay = getelementptr inbounds [256 x i32]* %x, i32 0, i32 0 ; <i32*>
557  %tmp1 = load i32* %arraydecay                   ; <i32> [#uses=1]
558  ret i32 %tmp1
559; CHECK-LABEL: @memset_to_load(
560; CHECK: ret i32 0
561}
562
563
564;;===----------------------------------------------------------------------===;;
565;; Load -> Load forwarding in partial alias case.
566;;===----------------------------------------------------------------------===;;
567
568define i32 @load_load_partial_alias(i8* %P) nounwind ssp {
569entry:
570  %0 = bitcast i8* %P to i32*
571  %tmp2 = load i32* %0
572  %add.ptr = getelementptr inbounds i8* %P, i64 1
573  %tmp5 = load i8* %add.ptr
574  %conv = zext i8 %tmp5 to i32
575  %add = add nsw i32 %tmp2, %conv
576  ret i32 %add
577
578; TEMPORARILYDISABLED-LABEL: @load_load_partial_alias(
579; TEMPORARILYDISABLED: load i32*
580; TEMPORARILYDISABLED-NOT: load
581; TEMPORARILYDISABLED: lshr i32 {{.*}}, 8
582; TEMPORARILYDISABLED-NOT: load
583; TEMPORARILYDISABLED: trunc i32 {{.*}} to i8
584; TEMPORARILYDISABLED-NOT: load
585; TEMPORARILYDISABLED: ret i32
586}
587
588
589; Cross block partial alias case.
590define i32 @load_load_partial_alias_cross_block(i8* %P) nounwind ssp {
591entry:
592  %xx = bitcast i8* %P to i32*
593  %x1 = load i32* %xx, align 4
594  %cmp = icmp eq i32 %x1, 127
595  br i1 %cmp, label %land.lhs.true, label %if.end
596
597land.lhs.true:                                    ; preds = %entry
598  %arrayidx4 = getelementptr inbounds i8* %P, i64 1
599  %tmp5 = load i8* %arrayidx4, align 1
600  %conv6 = zext i8 %tmp5 to i32
601  ret i32 %conv6
602
603if.end:
604  ret i32 52
605; TEMPORARILY_DISABLED-LABEL: @load_load_partial_alias_cross_block(
606; TEMPORARILY_DISABLED: land.lhs.true:
607; TEMPORARILY_DISABLED-NOT: load i8
608; TEMPORARILY_DISABLED: ret i32 %conv6
609}
610
611
612;;===----------------------------------------------------------------------===;;
613;; Load Widening
614;;===----------------------------------------------------------------------===;;
615
616%widening1 = type { i32, i8, i8, i8, i8 }
617
618@f = global %widening1 zeroinitializer, align 4
619
620define i32 @test_widening1(i8* %P) nounwind ssp noredzone {
621entry:
622  %tmp = load i8* getelementptr inbounds (%widening1* @f, i64 0, i32 1), align 4
623  %conv = zext i8 %tmp to i32
624  %tmp1 = load i8* getelementptr inbounds (%widening1* @f, i64 0, i32 2), align 1
625  %conv2 = zext i8 %tmp1 to i32
626  %add = add nsw i32 %conv, %conv2
627  ret i32 %add
628; CHECK-LABEL: @test_widening1(
629; CHECK-NOT: load
630; CHECK: load i16*
631; CHECK-NOT: load
632; CHECK: ret i32
633}
634
635define i32 @test_widening2() nounwind ssp noredzone {
636entry:
637  %tmp = load i8* getelementptr inbounds (%widening1* @f, i64 0, i32 1), align 4
638  %conv = zext i8 %tmp to i32
639  %tmp1 = load i8* getelementptr inbounds (%widening1* @f, i64 0, i32 2), align 1
640  %conv2 = zext i8 %tmp1 to i32
641  %add = add nsw i32 %conv, %conv2
642
643  %tmp2 = load i8* getelementptr inbounds (%widening1* @f, i64 0, i32 3), align 2
644  %conv3 = zext i8 %tmp2 to i32
645  %add2 = add nsw i32 %add, %conv3
646
647  %tmp3 = load i8* getelementptr inbounds (%widening1* @f, i64 0, i32 4), align 1
648  %conv4 = zext i8 %tmp3 to i32
649  %add3 = add nsw i32 %add2, %conv3
650
651  ret i32 %add3
652; CHECK-LABEL: @test_widening2(
653; CHECK-NOT: load
654; CHECK: load i32*
655; CHECK-NOT: load
656; CHECK: ret i32
657}
658
659declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
660
661declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
662declare void @llvm.memcpy.p0i8.p1i8.i64(i8* nocapture, i8 addrspace(1)* nocapture, i64, i32, i1) nounwind
663
664
665;;===----------------------------------------------------------------------===;;
666;; Load -> Store dependency which isn't interfered with by a call that happens
667;; before the pointer was captured.
668;;===----------------------------------------------------------------------===;;
669
670%class.X = type { [8 x i8] }
671
672@_ZTV1X = weak_odr constant [5 x i8*] zeroinitializer
673@_ZTV1Y = weak_odr constant [5 x i8*] zeroinitializer
674
675declare void @use()
676declare void @use3(i8***, i8**)
677
678; PR8908
679define void @test_escape1() nounwind {
680  %x = alloca i8**, align 8
681  store i8** getelementptr inbounds ([5 x i8*]* @_ZTV1X, i64 0, i64 2), i8*** %x, align 8
682  call void @use() nounwind
683  %DEAD = load i8*** %x, align 8
684  call void @use3(i8*** %x, i8** %DEAD) nounwind
685  ret void
686; CHECK: test_escape1
687; CHECK-NOT: DEAD
688; CHECK: ret
689}
690