xref: /llvm-project/llvm/test/CodeGen/X86/lsr-loop-exit-cond.ll (revision e6bf48d11047e970cb24554a01b65b566d6b5d22) 
1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2; RUN: llc < %s -mtriple=x86_64-darwin | FileCheck %s --check-prefix=GENERIC
3; RUN: llc < %s -mtriple=x86_64-darwin -mcpu=atom | FileCheck %s --check-prefix=ATOM
4
5@Te0 = external global [256 x i32]		; <[256 x i32]*> [#uses=5]
6@Te1 = external global [256 x i32]		; <[256 x i32]*> [#uses=4]
7@Te3 = external global [256 x i32]		; <[256 x i32]*> [#uses=2]
8
9define void @t(ptr nocapture %in, ptr nocapture %out, ptr nocapture %rk, i32 %r) nounwind {
10; GENERIC-LABEL: t:
11; GENERIC:       ## %bb.0: ## %entry
12; GENERIC-NEXT:    pushq %rbp
13; GENERIC-NEXT:    pushq %r15
14; GENERIC-NEXT:    pushq %r14
15; GENERIC-NEXT:    pushq %rbx
16; GENERIC-NEXT:    ## kill: def $ecx killed $ecx def $rcx
17; GENERIC-NEXT:    movl (%rdx), %r8d
18; GENERIC-NEXT:    movl 4(%rdx), %ebx
19; GENERIC-NEXT:    decl %ecx
20; GENERIC-NEXT:    leaq 20(%rdx), %r9
21; GENERIC-NEXT:    movq _Te0@GOTPCREL(%rip), %rdi
22; GENERIC-NEXT:    movq _Te1@GOTPCREL(%rip), %rax
23; GENERIC-NEXT:    movq _Te3@GOTPCREL(%rip), %r10
24; GENERIC-NEXT:    movq %rcx, %r11
25; GENERIC-NEXT:    .p2align 4
26; GENERIC-NEXT:  LBB0_1: ## %bb
27; GENERIC-NEXT:    ## =>This Inner Loop Header: Depth=1
28; GENERIC-NEXT:    movzbl %r8b, %r14d
29; GENERIC-NEXT:    ## kill: def $r8d killed $r8d def $r8
30; GENERIC-NEXT:    shrl $24, %r8d
31; GENERIC-NEXT:    movl %ebx, %r15d
32; GENERIC-NEXT:    shrl $14, %r15d
33; GENERIC-NEXT:    andl $1020, %r15d ## imm = 0x3FC
34; GENERIC-NEXT:    movl (%rax,%r15), %ebp
35; GENERIC-NEXT:    xorl (%rdi,%r8,4), %ebp
36; GENERIC-NEXT:    xorl -12(%r9), %ebp
37; GENERIC-NEXT:    shrl $24, %ebx
38; GENERIC-NEXT:    movl (%r10,%r14,4), %r14d
39; GENERIC-NEXT:    xorl (%rdi,%rbx,4), %r14d
40; GENERIC-NEXT:    xorl -8(%r9), %r14d
41; GENERIC-NEXT:    movl %ebp, %r8d
42; GENERIC-NEXT:    shrl $24, %r8d
43; GENERIC-NEXT:    movl (%rdi,%r8,4), %r8d
44; GENERIC-NEXT:    subq $1, %r11
45; GENERIC-NEXT:    jb LBB0_3
46; GENERIC-NEXT:  ## %bb.2: ## %bb1
47; GENERIC-NEXT:    ## in Loop: Header=BB0_1 Depth=1
48; GENERIC-NEXT:    movl %r14d, %ebx
49; GENERIC-NEXT:    shrl $14, %ebx
50; GENERIC-NEXT:    andl $1020, %ebx ## imm = 0x3FC
51; GENERIC-NEXT:    xorl (%rax,%rbx), %r8d
52; GENERIC-NEXT:    xorl -4(%r9), %r8d
53; GENERIC-NEXT:    shrl $24, %r14d
54; GENERIC-NEXT:    movzbl %bpl, %ebx
55; GENERIC-NEXT:    movl (%r10,%rbx,4), %ebx
56; GENERIC-NEXT:    xorl (%rdi,%r14,4), %ebx
57; GENERIC-NEXT:    xorl (%r9), %ebx
58; GENERIC-NEXT:    addq $16, %r9
59; GENERIC-NEXT:    jmp LBB0_1
60; GENERIC-NEXT:  LBB0_3: ## %bb2
61; GENERIC-NEXT:    shlq $4, %rcx
62; GENERIC-NEXT:    andl $-16777216, %r8d ## imm = 0xFF000000
63; GENERIC-NEXT:    movl %r14d, %r9d
64; GENERIC-NEXT:    shrl $14, %r9d
65; GENERIC-NEXT:    andl $1020, %r9d ## imm = 0x3FC
66; GENERIC-NEXT:    movzbl 2(%rax,%r9), %r9d
67; GENERIC-NEXT:    shll $16, %r9d
68; GENERIC-NEXT:    orl %r8d, %r9d
69; GENERIC-NEXT:    xorl 16(%rcx,%rdx), %r9d
70; GENERIC-NEXT:    shrl $8, %r14d
71; GENERIC-NEXT:    movzbl 3(%rdi,%r14,4), %edi
72; GENERIC-NEXT:    shll $24, %edi
73; GENERIC-NEXT:    movzbl %bpl, %r8d
74; GENERIC-NEXT:    movzbl 2(%rax,%r8,4), %eax
75; GENERIC-NEXT:    shll $16, %eax
76; GENERIC-NEXT:    orl %edi, %eax
77; GENERIC-NEXT:    xorl 20(%rcx,%rdx), %eax
78; GENERIC-NEXT:    movl %r9d, %ecx
79; GENERIC-NEXT:    shrl $24, %ecx
80; GENERIC-NEXT:    movb %cl, (%rsi)
81; GENERIC-NEXT:    shrl $16, %r9d
82; GENERIC-NEXT:    movb %r9b, 1(%rsi)
83; GENERIC-NEXT:    movl %eax, %ecx
84; GENERIC-NEXT:    shrl $24, %ecx
85; GENERIC-NEXT:    movb %cl, 4(%rsi)
86; GENERIC-NEXT:    shrl $16, %eax
87; GENERIC-NEXT:    movb %al, 5(%rsi)
88; GENERIC-NEXT:    popq %rbx
89; GENERIC-NEXT:    popq %r14
90; GENERIC-NEXT:    popq %r15
91; GENERIC-NEXT:    popq %rbp
92; GENERIC-NEXT:    retq
93;
94; ATOM-LABEL: t:
95; ATOM:       ## %bb.0: ## %entry
96; ATOM-NEXT:    pushq %r15
97; ATOM-NEXT:    pushq %r14
98; ATOM-NEXT:    pushq %rbx
99; ATOM-NEXT:    ## kill: def $ecx killed $ecx def $rcx
100; ATOM-NEXT:    movl (%rdx), %r8d
101; ATOM-NEXT:    movl 4(%rdx), %r15d
102; ATOM-NEXT:    leaq 20(%rdx), %r9
103; ATOM-NEXT:    movq _Te0@GOTPCREL(%rip), %rdi
104; ATOM-NEXT:    movq _Te1@GOTPCREL(%rip), %rax
105; ATOM-NEXT:    movq _Te3@GOTPCREL(%rip), %r10
106; ATOM-NEXT:    decl %ecx
107; ATOM-NEXT:    movq %rcx, %r11
108; ATOM-NEXT:    .p2align 4
109; ATOM-NEXT:  LBB0_1: ## %bb
110; ATOM-NEXT:    ## =>This Inner Loop Header: Depth=1
111; ATOM-NEXT:    movl %r15d, %ebx
112; ATOM-NEXT:    movl %r8d, %r14d
113; ATOM-NEXT:    movzbl %r8b, %r8d
114; ATOM-NEXT:    shrl $24, %r15d
115; ATOM-NEXT:    shrl $14, %ebx
116; ATOM-NEXT:    shrl $24, %r14d
117; ATOM-NEXT:    andl $1020, %ebx ## imm = 0x3FC
118; ATOM-NEXT:    movl (%rax,%rbx), %ebx
119; ATOM-NEXT:    xorl (%rdi,%r14,4), %ebx
120; ATOM-NEXT:    movl (%r10,%r8,4), %r14d
121; ATOM-NEXT:    xorl -12(%r9), %ebx
122; ATOM-NEXT:    xorl (%rdi,%r15,4), %r14d
123; ATOM-NEXT:    movl %ebx, %r8d
124; ATOM-NEXT:    xorl -8(%r9), %r14d
125; ATOM-NEXT:    shrl $24, %r8d
126; ATOM-NEXT:    subq $1, %r11
127; ATOM-NEXT:    movl (%rdi,%r8,4), %r8d
128; ATOM-NEXT:    jb LBB0_3
129; ATOM-NEXT:  ## %bb.2: ## %bb1
130; ATOM-NEXT:    ## in Loop: Header=BB0_1 Depth=1
131; ATOM-NEXT:    movl %r14d, %r15d
132; ATOM-NEXT:    movzbl %bl, %ebx
133; ATOM-NEXT:    shrl $24, %r14d
134; ATOM-NEXT:    shrl $14, %r15d
135; ATOM-NEXT:    andl $1020, %r15d ## imm = 0x3FC
136; ATOM-NEXT:    xorl (%rax,%r15), %r8d
137; ATOM-NEXT:    movl (%r10,%rbx,4), %r15d
138; ATOM-NEXT:    xorl (%rdi,%r14,4), %r15d
139; ATOM-NEXT:    xorl -4(%r9), %r8d
140; ATOM-NEXT:    xorl (%r9), %r15d
141; ATOM-NEXT:    addq $16, %r9
142; ATOM-NEXT:    jmp LBB0_1
143; ATOM-NEXT:  LBB0_3: ## %bb2
144; ATOM-NEXT:    movl %r14d, %r9d
145; ATOM-NEXT:    andl $-16777216, %r8d ## imm = 0xFF000000
146; ATOM-NEXT:    shrl $8, %r14d
147; ATOM-NEXT:    shlq $4, %rcx
148; ATOM-NEXT:    shrl $14, %r9d
149; ATOM-NEXT:    movzbl 3(%rdi,%r14,4), %edi
150; ATOM-NEXT:    andl $1020, %r9d ## imm = 0x3FC
151; ATOM-NEXT:    shll $24, %edi
152; ATOM-NEXT:    movzbl 2(%rax,%r9), %r9d
153; ATOM-NEXT:    shll $16, %r9d
154; ATOM-NEXT:    orl %r8d, %r9d
155; ATOM-NEXT:    movzbl %bl, %r8d
156; ATOM-NEXT:    movzbl 2(%rax,%r8,4), %eax
157; ATOM-NEXT:    xorl 16(%rcx,%rdx), %r9d
158; ATOM-NEXT:    shll $16, %eax
159; ATOM-NEXT:    orl %edi, %eax
160; ATOM-NEXT:    movl %r9d, %edi
161; ATOM-NEXT:    shrl $16, %r9d
162; ATOM-NEXT:    xorl 20(%rcx,%rdx), %eax
163; ATOM-NEXT:    shrl $24, %edi
164; ATOM-NEXT:    movl %eax, %ecx
165; ATOM-NEXT:    shrl $16, %eax
166; ATOM-NEXT:    movb %dil, (%rsi)
167; ATOM-NEXT:    movb %r9b, 1(%rsi)
168; ATOM-NEXT:    shrl $24, %ecx
169; ATOM-NEXT:    movb %cl, 4(%rsi)
170; ATOM-NEXT:    movb %al, 5(%rsi)
171; ATOM-NEXT:    popq %rbx
172; ATOM-NEXT:    popq %r14
173; ATOM-NEXT:    popq %r15
174; ATOM-NEXT:    retq
175entry:
176	%0 = load i32, ptr %rk, align 4		; <i32> [#uses=1]
177	%1 = getelementptr i32, ptr %rk, i64 1		; <i32*> [#uses=1]
178	%2 = load i32, ptr %1, align 4		; <i32> [#uses=1]
179	%tmp15 = add i32 %r, -1		; <i32> [#uses=1]
180	%tmp.16 = zext i32 %tmp15 to i64		; <i64> [#uses=2]
181	br label %bb
182
183bb:		; preds = %bb1, %entry
184	%indvar = phi i64 [ 0, %entry ], [ %indvar.next, %bb1 ]		; <i64> [#uses=3]
185	%s1.0 = phi i32 [ %2, %entry ], [ %56, %bb1 ]		; <i32> [#uses=2]
186	%s0.0 = phi i32 [ %0, %entry ], [ %43, %bb1 ]		; <i32> [#uses=2]
187	%tmp18 = shl i64 %indvar, 4		; <i64> [#uses=4]
188	%rk26 = bitcast ptr %rk to ptr		; <i8*> [#uses=6]
189	%3 = lshr i32 %s0.0, 24		; <i32> [#uses=1]
190	%4 = zext i32 %3 to i64		; <i64> [#uses=1]
191	%5 = getelementptr [256 x i32], ptr @Te0, i64 0, i64 %4		; <i32*> [#uses=1]
192	%6 = load i32, ptr %5, align 4		; <i32> [#uses=1]
193	%7 = lshr i32 %s1.0, 16		; <i32> [#uses=1]
194	%8 = and i32 %7, 255		; <i32> [#uses=1]
195	%9 = zext i32 %8 to i64		; <i64> [#uses=1]
196	%10 = getelementptr [256 x i32], ptr @Te1, i64 0, i64 %9		; <i32*> [#uses=1]
197	%11 = load i32, ptr %10, align 4		; <i32> [#uses=1]
198	%ctg2.sum2728 = or disjoint i64 %tmp18, 8		; <i64> [#uses=1]
199	%12 = getelementptr i8, ptr %rk26, i64 %ctg2.sum2728		; <i8*> [#uses=1]
200	%13 = bitcast ptr %12 to ptr		; <i32*> [#uses=1]
201	%14 = load i32, ptr %13, align 4		; <i32> [#uses=1]
202	%15 = xor i32 %11, %6		; <i32> [#uses=1]
203	%16 = xor i32 %15, %14		; <i32> [#uses=3]
204	%17 = lshr i32 %s1.0, 24		; <i32> [#uses=1]
205	%18 = zext i32 %17 to i64		; <i64> [#uses=1]
206	%19 = getelementptr [256 x i32], ptr @Te0, i64 0, i64 %18		; <i32*> [#uses=1]
207	%20 = load i32, ptr %19, align 4		; <i32> [#uses=1]
208	%21 = and i32 %s0.0, 255		; <i32> [#uses=1]
209	%22 = zext i32 %21 to i64		; <i64> [#uses=1]
210	%23 = getelementptr [256 x i32], ptr @Te3, i64 0, i64 %22		; <i32*> [#uses=1]
211	%24 = load i32, ptr %23, align 4		; <i32> [#uses=1]
212	%ctg2.sum2930 = or disjoint i64 %tmp18, 12		; <i64> [#uses=1]
213	%25 = getelementptr i8, ptr %rk26, i64 %ctg2.sum2930		; <i8*> [#uses=1]
214	%26 = bitcast ptr %25 to ptr		; <i32*> [#uses=1]
215	%27 = load i32, ptr %26, align 4		; <i32> [#uses=1]
216	%28 = xor i32 %24, %20		; <i32> [#uses=1]
217	%29 = xor i32 %28, %27		; <i32> [#uses=4]
218	%30 = lshr i32 %16, 24		; <i32> [#uses=1]
219	%31 = zext i32 %30 to i64		; <i64> [#uses=1]
220	%32 = getelementptr [256 x i32], ptr @Te0, i64 0, i64 %31		; <i32*> [#uses=1]
221	%33 = load i32, ptr %32, align 4		; <i32> [#uses=2]
222	%exitcond = icmp eq i64 %indvar, %tmp.16		; <i1> [#uses=1]
223	br i1 %exitcond, label %bb2, label %bb1
224
225bb1:		; preds = %bb
226	%ctg2.sum31 = add i64 %tmp18, 16		; <i64> [#uses=1]
227	%34 = getelementptr i8, ptr %rk26, i64 %ctg2.sum31		; <i8*> [#uses=1]
228	%35 = bitcast ptr %34 to ptr		; <i32*> [#uses=1]
229	%36 = lshr i32 %29, 16		; <i32> [#uses=1]
230	%37 = and i32 %36, 255		; <i32> [#uses=1]
231	%38 = zext i32 %37 to i64		; <i64> [#uses=1]
232	%39 = getelementptr [256 x i32], ptr @Te1, i64 0, i64 %38		; <i32*> [#uses=1]
233	%40 = load i32, ptr %39, align 4		; <i32> [#uses=1]
234	%41 = load i32, ptr %35, align 4		; <i32> [#uses=1]
235	%42 = xor i32 %40, %33		; <i32> [#uses=1]
236	%43 = xor i32 %42, %41		; <i32> [#uses=1]
237	%44 = lshr i32 %29, 24		; <i32> [#uses=1]
238	%45 = zext i32 %44 to i64		; <i64> [#uses=1]
239	%46 = getelementptr [256 x i32], ptr @Te0, i64 0, i64 %45		; <i32*> [#uses=1]
240	%47 = load i32, ptr %46, align 4		; <i32> [#uses=1]
241	%48 = and i32 %16, 255		; <i32> [#uses=1]
242	%49 = zext i32 %48 to i64		; <i64> [#uses=1]
243	%50 = getelementptr [256 x i32], ptr @Te3, i64 0, i64 %49		; <i32*> [#uses=1]
244	%51 = load i32, ptr %50, align 4		; <i32> [#uses=1]
245	%ctg2.sum32 = add i64 %tmp18, 20		; <i64> [#uses=1]
246	%52 = getelementptr i8, ptr %rk26, i64 %ctg2.sum32		; <i8*> [#uses=1]
247	%53 = bitcast ptr %52 to ptr		; <i32*> [#uses=1]
248	%54 = load i32, ptr %53, align 4		; <i32> [#uses=1]
249	%55 = xor i32 %51, %47		; <i32> [#uses=1]
250	%56 = xor i32 %55, %54		; <i32> [#uses=1]
251	%indvar.next = add i64 %indvar, 1		; <i64> [#uses=1]
252	br label %bb
253
254bb2:		; preds = %bb
255	%tmp10 = shl i64 %tmp.16, 4		; <i64> [#uses=2]
256	%ctg2.sum = add i64 %tmp10, 16		; <i64> [#uses=1]
257	%tmp1213 = getelementptr i8, ptr %rk26, i64 %ctg2.sum		; <i8*> [#uses=1]
258	%57 = bitcast ptr %tmp1213 to ptr		; <i32*> [#uses=1]
259	%58 = and i32 %33, -16777216		; <i32> [#uses=1]
260	%59 = lshr i32 %29, 16		; <i32> [#uses=1]
261	%60 = and i32 %59, 255		; <i32> [#uses=1]
262	%61 = zext i32 %60 to i64		; <i64> [#uses=1]
263	%62 = getelementptr [256 x i32], ptr @Te1, i64 0, i64 %61		; <i32*> [#uses=1]
264	%63 = load i32, ptr %62, align 4		; <i32> [#uses=1]
265	%64 = and i32 %63, 16711680		; <i32> [#uses=1]
266	%65 = or i32 %64, %58		; <i32> [#uses=1]
267	%66 = load i32, ptr %57, align 4		; <i32> [#uses=1]
268	%67 = xor i32 %65, %66		; <i32> [#uses=2]
269	%68 = lshr i32 %29, 8		; <i32> [#uses=1]
270	%69 = zext i32 %68 to i64		; <i64> [#uses=1]
271	%70 = getelementptr [256 x i32], ptr @Te0, i64 0, i64 %69		; <i32*> [#uses=1]
272	%71 = load i32, ptr %70, align 4		; <i32> [#uses=1]
273	%72 = and i32 %71, -16777216		; <i32> [#uses=1]
274	%73 = and i32 %16, 255		; <i32> [#uses=1]
275	%74 = zext i32 %73 to i64		; <i64> [#uses=1]
276	%75 = getelementptr [256 x i32], ptr @Te1, i64 0, i64 %74		; <i32*> [#uses=1]
277	%76 = load i32, ptr %75, align 4		; <i32> [#uses=1]
278	%77 = and i32 %76, 16711680		; <i32> [#uses=1]
279	%78 = or i32 %77, %72		; <i32> [#uses=1]
280	%ctg2.sum25 = add i64 %tmp10, 20		; <i64> [#uses=1]
281	%79 = getelementptr i8, ptr %rk26, i64 %ctg2.sum25		; <i8*> [#uses=1]
282	%80 = bitcast ptr %79 to ptr		; <i32*> [#uses=1]
283	%81 = load i32, ptr %80, align 4		; <i32> [#uses=1]
284	%82 = xor i32 %78, %81		; <i32> [#uses=2]
285	%83 = lshr i32 %67, 24		; <i32> [#uses=1]
286	%84 = trunc i32 %83 to i8		; <i8> [#uses=1]
287	store i8 %84, ptr %out, align 1
288	%85 = lshr i32 %67, 16		; <i32> [#uses=1]
289	%86 = trunc i32 %85 to i8		; <i8> [#uses=1]
290	%87 = getelementptr i8, ptr %out, i64 1		; <i8*> [#uses=1]
291	store i8 %86, ptr %87, align 1
292	%88 = getelementptr i8, ptr %out, i64 4		; <i8*> [#uses=1]
293	%89 = lshr i32 %82, 24		; <i32> [#uses=1]
294	%90 = trunc i32 %89 to i8		; <i8> [#uses=1]
295	store i8 %90, ptr %88, align 1
296	%91 = lshr i32 %82, 16		; <i32> [#uses=1]
297	%92 = trunc i32 %91 to i8		; <i8> [#uses=1]
298	%93 = getelementptr i8, ptr %out, i64 5		; <i8*> [#uses=1]
299	store i8 %92, ptr %93, align 1
300	ret void
301}
302
303; Check that DAGCombiner doesn't mess up the IV update when the exiting value
304; is equal to the stride.
305; It must not fold (cmp (add iv, 1), 1) --> (cmp iv, 0).
306
307define i32 @f(i32 %i, ptr nocapture %a) nounwind uwtable readonly ssp {
308; GENERIC-LABEL: f:
309; GENERIC:       ## %bb.0: ## %entry
310; GENERIC-NEXT:    xorl %eax, %eax
311; GENERIC-NEXT:    cmpl $1, %edi
312; GENERIC-NEXT:    je LBB1_3
313; GENERIC-NEXT:  ## %bb.1: ## %for.body.lr.ph
314; GENERIC-NEXT:    movslq %edi, %rax
315; GENERIC-NEXT:    leaq (%rsi,%rax,4), %rcx
316; GENERIC-NEXT:    xorl %eax, %eax
317; GENERIC-NEXT:    xorl %edx, %edx
318; GENERIC-NEXT:    .p2align 4
319; GENERIC-NEXT:  LBB1_2: ## %for.body
320; GENERIC-NEXT:    ## =>This Inner Loop Header: Depth=1
321; GENERIC-NEXT:    movl (%rcx), %esi
322; GENERIC-NEXT:    cmpl %edx, %esi
323; GENERIC-NEXT:    cmoval %esi, %edx
324; GENERIC-NEXT:    cmoval %edi, %eax
325; GENERIC-NEXT:    incl %edi
326; GENERIC-NEXT:    addq $4, %rcx
327; GENERIC-NEXT:    cmpl $1, %edi
328; GENERIC-NEXT:    jne LBB1_2
329; GENERIC-NEXT:  LBB1_3: ## %for.end
330; GENERIC-NEXT:    retq
331;
332; ATOM-LABEL: f:
333; ATOM:       ## %bb.0: ## %entry
334; ATOM-NEXT:    xorl %eax, %eax
335; ATOM-NEXT:    cmpl $1, %edi
336; ATOM-NEXT:    je LBB1_3
337; ATOM-NEXT:  ## %bb.1: ## %for.body.lr.ph
338; ATOM-NEXT:    movslq %edi, %rax
339; ATOM-NEXT:    xorl %edx, %edx
340; ATOM-NEXT:    leaq (%rsi,%rax,4), %rcx
341; ATOM-NEXT:    xorl %eax, %eax
342; ATOM-NEXT:    .p2align 4
343; ATOM-NEXT:  LBB1_2: ## %for.body
344; ATOM-NEXT:    ## =>This Inner Loop Header: Depth=1
345; ATOM-NEXT:    movl (%rcx), %esi
346; ATOM-NEXT:    cmpl %edx, %esi
347; ATOM-NEXT:    cmoval %esi, %edx
348; ATOM-NEXT:    cmoval %edi, %eax
349; ATOM-NEXT:    incl %edi
350; ATOM-NEXT:    leaq 4(%rcx), %rcx
351; ATOM-NEXT:    cmpl $1, %edi
352; ATOM-NEXT:    jne LBB1_2
353; ATOM-NEXT:  LBB1_3: ## %for.end
354; ATOM-NEXT:    nop
355; ATOM-NEXT:    nop
356; ATOM-NEXT:    retq
357entry:
358  %cmp4 = icmp eq i32 %i, 1
359  br i1 %cmp4, label %for.end, label %for.body.lr.ph
360
361for.body.lr.ph:                                   ; preds = %entry
362  %0 = sext i32 %i to i64
363  br label %for.body
364
365for.body:                                         ; preds = %for.body.lr.ph, %for.body
366  %indvars.iv = phi i64 [ %0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ]
367  %bi.06 = phi i32 [ 0, %for.body.lr.ph ], [ %i.addr.0.bi.0, %for.body ]
368  %b.05 = phi i32 [ 0, %for.body.lr.ph ], [ %.b.0, %for.body ]
369  %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
370  %1 = load i32, ptr %arrayidx, align 4
371  %cmp1 = icmp ugt i32 %1, %b.05
372  %.b.0 = select i1 %cmp1, i32 %1, i32 %b.05
373  %2 = trunc i64 %indvars.iv to i32
374  %i.addr.0.bi.0 = select i1 %cmp1, i32 %2, i32 %bi.06
375  %indvars.iv.next = add i64 %indvars.iv, 1
376  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
377  %exitcond = icmp eq i32 %lftr.wideiv, 1
378  br i1 %exitcond, label %for.end, label %for.body
379
380for.end:                                          ; preds = %for.body, %entry
381  %bi.0.lcssa = phi i32 [ 0, %entry ], [ %i.addr.0.bi.0, %for.body ]
382  ret i32 %bi.0.lcssa
383}
384