1 ; RUN: llc < %s -mtriple=x86_64-apple-macosx -regalloc=greedy | FileCheck %s
3 ; This testing case is reduced from 254.gap SyFgets function.
4 ; We make sure a spill is hoisted to a cold BB inside the hotter outer loop.
6 %struct.TMP.1 = type { %struct.TMP.2*, %struct.TMP.2*, [1024 x i8] }
7 %struct.TMP.2 = type { i8*, i32, i32, i16, i16, %struct.TMP.3, i32, i8*, i32 (i8*)*, i32 (i8*, i8*, i32)*, i64 (i8*, i64, i32)*, i32 (i8*, i8*, i32)*, %struct.TMP.3, %struct.TMP.4*, i32, [3 x i8], [1 x i8], %struct.TMP.3, i32, i64 }
8 %struct.TMP.4 = type opaque
9 %struct.TMP.3 = type { i8*, i32 }
11 @syBuf = external global [16 x %struct.TMP.1], align 16
12 @syHistory = external global [8192 x i8], align 16
13 @SyFgets.yank = external global [512 x i8], align 16
14 @syCTRO = external global i32, align 4
16 ; CHECK-LABEL: SyFgets
17 define i8* @SyFgets(i8* %line, i64 %length, i64 %fid) {
19 %sub.ptr.rhs.cast646 = ptrtoint i8* %line to i64
20 %old = alloca [512 x i8], align 16
21 %0 = getelementptr inbounds [512 x i8], [512 x i8]* %old, i64 0, i64 0
22 switch i64 %fid, label %if.then [
31 switch i64 undef, label %if.end25 [
32 i64 0, label %if.then4
33 i64 1, label %if.end25
37 br i1 undef, label %SyTime.exit, label %if.then.i
43 br i1 undef, label %SyTime.exit2681, label %if.then.i2673
55 br i1 undef, label %SyTime.exit2720, label %if.then.i2712
61 %add.ptr = getelementptr [512 x i8], [512 x i8]* %old, i64 0, i64 512
62 %cmp293427 = icmp ult i8* %0, %add.ptr
63 br i1 %cmp293427, label %for.body.lr.ph, label %while.body.preheader
66 call void @llvm.memset.p0i8.i64(i8* align 16 undef, i8 32, i64 512, i1 false)
67 br label %while.body.preheader
70 %add.ptr1603 = getelementptr [512 x i8], [512 x i8]* null, i64 0, i64 512
71 %echo.i3101 = getelementptr [16 x %struct.TMP.1], [16 x %struct.TMP.1]* @syBuf, i64 0, i64 %fid, i32 1
72 %1 = xor i64 %sub.ptr.rhs.cast646, -1
76 %ch2.0 = phi i32 [ 0, %while.body.preheader ], [ %ch.12.ch2.12, %do.body ]
77 %rep.0 = phi i32 [ 1, %while.body.preheader ], [ %rep.6, %do.body ]
78 store i32 0, i32* @syCTRO, align 4, !tbaa !1
79 %ch.0.ch2.0 = select i1 undef, i32 14, i32 %ch2.0
80 %ch2.2 = select i1 undef, i32 0, i32 %ch.0.ch2.0
81 %ch.2.ch2.2 = select i1 undef, i32 0, i32 %ch2.2
82 %ch2.4 = select i1 undef, i32 278, i32 %ch.2.ch2.2
83 %ch2.5 = select i1 undef, i32 0, i32 %ch2.4
84 %rep.2 = select i1 undef, i32 undef, i32 %rep.0
85 %ch.5.ch2.5 = select i1 undef, i32 undef, i32 %ch2.5
86 %ch2.7 = select i1 undef, i32 0, i32 %ch.5.ch2.5
87 %rep.3 = select i1 undef, i32 undef, i32 %rep.2
88 %ch.7.ch2.7 = select i1 false, i32 0, i32 %ch2.7
89 %mul98.rep.3 = select i1 false, i32 0, i32 %rep.3
90 %ch2.9 = select i1 undef, i32 undef, i32 %ch.7.ch2.7
91 %rep.5 = select i1 undef, i32 undef, i32 %mul98.rep.3
92 %ch2.10 = select i1 false, i32 undef, i32 %ch2.9
93 %rep.6 = select i1 false, i32 undef, i32 %rep.5
94 %isdigittmp = add i32 %ch2.10, -48
95 %isdigit = icmp ult i32 %isdigittmp, 10
96 %cmp119 = icmp eq i32 undef, 22
97 %or.cond1875 = and i1 %isdigit, %cmp119
98 %ch.10.ch2.10 = select i1 %or.cond1875, i32 undef, i32 %ch2.10
99 %.ch.10 = select i1 %or.cond1875, i32 0, i32 undef
100 %ch2.12 = select i1 undef, i32 %.ch.10, i32 %ch.10.ch2.10
101 %ch.12 = select i1 undef, i32 0, i32 %.ch.10
102 %ch.12.ch2.12 = select i1 false, i32 %ch.12, i32 %ch2.12
103 %.ch.12 = select i1 false, i32 0, i32 %ch.12
104 %cmp147 = icmp eq i32 %.ch.12, 0
105 br i1 %cmp147, label %do.body, label %do.end
108 %cmp164 = icmp eq i32 %ch.12.ch2.12, 21
109 %mul167 = shl i32 %rep.6, 2
110 %rep.8 = select i1 %cmp164, i32 %mul167, i32 %rep.6
111 %..ch.19 = select i1 false, i32 2, i32 0
112 br i1 undef, label %while.body200, label %while.end1465
115 %dec3386.in = phi i32 [ %dec3386, %while.cond197.backedge ], [ %rep.8, %do.end ]
116 %oldc.13384 = phi i32 [ %oldc.1.be, %while.cond197.backedge ], [ 0, %do.end ]
117 %ch.213379 = phi i32 [ %last.1.be, %while.cond197.backedge ], [ %..ch.19, %do.end ]
118 %last.13371 = phi i32 [ %last.1.be, %while.cond197.backedge ], [ 0, %do.end ]
119 %dec3386 = add i32 %dec3386.in, -1
120 switch i32 %ch.213379, label %sw.default [
121 i32 1, label %while.cond201.preheader
122 i32 322, label %sw.bb206
123 i32 354, label %sw.bb206
124 i32 2, label %sw.bb243
125 i32 364, label %sw.bb1077
126 i32 326, label %sw.bb256
127 i32 358, label %sw.bb256
128 i32 341, label %sw.bb979
129 i32 323, label %while.cond1037.preheader
130 i32 373, label %sw.bb979
131 i32 4, label %if.then1477
132 i32 332, label %sw.bb1077
133 i32 11, label %for.cond357
134 i32 355, label %while.cond1037.preheader
135 i32 324, label %sw.bb474
136 i32 356, label %sw.bb474
137 i32 20, label %sw.bb566
138 i32 -1, label %while.cond197.backedge
139 i32 268, label %sw.bb1134
140 i32 16, label %while.cond635.preheader
141 i32 18, label %sw.bb956
142 i32 316, label %while.cond864
145 while.cond1037.preheader:
146 %cmp10393273 = icmp eq i8 undef, 0
147 br i1 %cmp10393273, label %if.end1070, label %land.rhs1041
149 while.cond635.preheader:
150 br i1 undef, label %for.body643.us, label %while.cond661
153 br label %for.body643.us
155 while.cond201.preheader:
156 %umax = select i1 false, i64 undef, i64 %1
157 %2 = xor i64 %umax, -1
158 %3 = inttoptr i64 %2 to i8*
159 br label %while.cond197.backedge
162 br label %while.cond197.backedge
165 br label %while.cond197.backedge
168 br label %while.cond197.backedge
170 while.cond197.backedge:
171 %last.1.be = phi i32 [ %ch.213379, %sw.default ], [ -1, %while.body200 ], [ %ch.213379, %sw.bb1077 ], [ %ch.213379, %sw.bb979 ], [ 18, %sw.bb956 ], [ 20, %sw.bb566 ], [ %ch.213379, %for.end552 ], [ %ch.213379, %sw.bb256 ], [ 2, %sw.bb243 ], [ 1, %while.cond201.preheader ], [ 268, %for.cond1145.preheader ], [ %ch.213379, %sw.bb206 ]
172 %oldc.1.be = phi i32 [ %oldc.13384, %sw.default ], [ %oldc.13384, %while.body200 ], [ %oldc.13384, %sw.bb1077 ], [ %oldc.13384, %sw.bb979 ], [ %oldc.13384, %sw.bb956 ], [ %oldc.13384, %sw.bb566 ], [ %oldc.13384, %for.end552 ], [ %oldc.13384, %sw.bb256 ], [ %oldc.13384, %sw.bb243 ], [ %oldc.13384, %while.cond201.preheader ], [ 0, %for.cond1145.preheader ], [ %oldc.13384, %sw.bb206 ]
173 %cmp198 = icmp sgt i32 %dec3386, 0
174 br i1 %cmp198, label %while.body200, label %while.end1465
177 br label %for.cond357
181 ; spill is hoisted here. Although loop depth1 is even hotter than loop depth2, sw.bb474 is still cold.
182 ; CHECK: movq %r{{.*}}, {{[0-9]+}}(%rsp)
184 %cmp476 = icmp eq i8 undef, 0
185 br i1 %cmp476, label %if.end517, label %do.body479.preheader
187 do.body479.preheader:
188 %cmp4833314 = icmp eq i8 undef, 0
189 br i1 %cmp4833314, label %if.end517, label %land.rhs485
192 %incdec.ptr4803316 = phi i8* [ %incdec.ptr480, %do.body479.backedge.land.rhs485_crit_edge ], [ undef, %do.body479.preheader ]
193 %isascii.i.i27763151 = icmp sgt i8 undef, -1
194 br i1 %isascii.i.i27763151, label %cond.true.i.i2780, label %cond.false.i.i2782
197 br i1 undef, label %land.lhs.true490, label %lor.rhs500
203 br i1 false, label %lor.rhs500, label %do.body479.backedge
207 ; Make sure spill is hoisted to a cold preheader in outside loop.
208 ; CHECK-NOT: movq %r{{.*}}, {{[0-9]+}}(%rsp)
209 ; CHECK: callq {{.*}}maskrune
210 %call3.i.i2792 = call i32 @__maskrune(i32 undef, i64 256)
211 br i1 undef, label %land.lhs.true504, label %do.body479.backedge
214 br i1 undef, label %do.body479.backedge, label %if.end517
217 %incdec.ptr480 = getelementptr i8, i8* %incdec.ptr4803316, i64 1
218 %cmp483 = icmp eq i8 undef, 0
219 br i1 %cmp483, label %if.end517, label %do.body479.backedge.land.rhs485_crit_edge
221 do.body479.backedge.land.rhs485_crit_edge:
222 br label %land.rhs485
225 %q.4 = phi i8* [ undef, %sw.bb474 ], [ undef, %do.body479.preheader ], [ %incdec.ptr480, %do.body479.backedge ], [ %incdec.ptr4803316, %land.lhs.true504 ]
226 switch i32 %last.13371, label %if.then532 [
227 i32 383, label %for.cond534
228 i32 356, label %for.cond534
229 i32 324, label %for.cond534
230 i32 24, label %for.cond534
231 i32 11, label %for.cond534
235 store i8 0, i8* getelementptr inbounds ([512 x i8], [512 x i8]* @SyFgets.yank, i64 0, i64 0), align 16, !tbaa !5
236 br label %for.cond534
239 %cmp536 = icmp eq i8 undef, 0
240 br i1 %cmp536, label %for.cond542.preheader, label %for.cond534
242 for.cond542.preheader:
243 br i1 undef, label %for.body545, label %for.end552
246 br i1 undef, label %for.end552, label %for.body545
249 %s.2.lcssa = phi i8* [ undef, %for.cond542.preheader ], [ %q.4, %for.body545 ]
250 %sub.ptr.lhs.cast553 = ptrtoint i8* %s.2.lcssa to i64
251 %sub.ptr.sub555 = sub i64 %sub.ptr.lhs.cast553, 0
252 %arrayidx556 = getelementptr i8, i8* null, i64 %sub.ptr.sub555
253 store i8 0, i8* %arrayidx556, align 1, !tbaa !5
254 br label %while.cond197.backedge
257 br label %while.cond197.backedge
260 br label %while.cond661
263 br label %while.cond864
266 br i1 undef, label %if.then959, label %while.cond197.backedge
269 br label %while.cond962
272 br label %while.cond962
275 br label %while.cond197.backedge
284 br label %while.cond197.backedge
287 br i1 false, label %for.body1139, label %for.cond1145.preheader
289 for.cond1145.preheader:
290 br i1 %cmp293427, label %for.body1150.lr.ph, label %while.cond197.backedge
299 br label %while.cond197.backedge
302 %oldc.1.lcssa = phi i32 [ 0, %do.end ], [ %oldc.1.be, %while.cond197.backedge ]
303 %ch.21.lcssa = phi i32 [ %..ch.19, %do.end ], [ %last.1.be, %while.cond197.backedge ]
304 switch i32 %ch.21.lcssa, label %for.cond1480.preheader [
305 i32 -1, label %if.then1477
306 i32 15, label %if.then1477
307 i32 13, label %if.then1477
308 i32 10, label %if.then1477
311 for.cond1480.preheader:
312 br i1 undef, label %for.body1606.lr.ph, label %for.end1609
315 %p.1.lcssa3539 = phi i8* [ null, %while.end1465 ], [ null, %while.end1465 ], [ null, %while.end1465 ], [ null, %while.end1465 ], [ %line, %while.body200 ]
316 %call1.i3057 = call i64 @"\01_write"(i32 undef, i8* undef, i64 1)
317 %sub.ptr.lhs.cast1717 = ptrtoint i8* %p.1.lcssa3539 to i64
318 %sub.ptr.sub1719 = sub i64 %sub.ptr.lhs.cast1717, %sub.ptr.rhs.cast646
319 %idx.neg1727 = sub i64 0, %sub.ptr.sub1719
320 br label %for.body1723
323 br label %for.end1609
326 br i1 undef, label %for.cond1659.preheader, label %land.lhs.true1614
329 br label %for.cond1659.preheader
331 for.cond1659.preheader:
332 %cmp16623414 = icmp ult i8* undef, %add.ptr1603
333 br i1 %cmp16623414, label %for.body1664.lr.ph, label %while.body1703.lr.ph
336 %cmp16773405 = icmp slt i64 undef, undef
337 br i1 %cmp16773405, label %while.body1679, label %while.cond1683.preheader
339 while.body1703.lr.ph:
342 while.cond1683.preheader:
343 br i1 undef, label %while.body1691, label %while.end1693
346 %oldc.43406 = phi i32 [ %inc, %syEchoch.exit3070 ], [ %oldc.1.lcssa, %for.body1664.lr.ph ]
347 %4 = load %struct.TMP.2*, %struct.TMP.2** %echo.i3101, align 8, !tbaa !6
348 %call.i3062 = call i32 @fileno(%struct.TMP.2* %4)
349 br i1 undef, label %if.then.i3069, label %syEchoch.exit3070
352 br label %syEchoch.exit3070
355 %inc = add i32 %oldc.43406, 1
356 %conv1672 = sext i32 %inc to i64
357 %cmp1677 = icmp slt i64 %conv1672, undef
358 br i1 %cmp1677, label %while.body1679, label %while.cond1683.preheader
367 %q.303203 = phi i8* [ getelementptr inbounds ([8192 x i8], [8192 x i8]* @syHistory, i64 0, i64 8189), %if.then1477 ], [ %incdec.ptr1730, %for.body1723 ]
368 %add.ptr1728 = getelementptr i8, i8* %q.303203, i64 %idx.neg1727
369 %5 = load i8, i8* %add.ptr1728, align 1, !tbaa !5
370 %incdec.ptr1730 = getelementptr i8, i8* %q.303203, i64 -1
371 br label %for.body1723
377 declare i32 @fileno(%struct.TMP.2* nocapture)
378 declare i64 @"\01_write"(i32, i8*, i64)
379 declare i32 @__maskrune(i32, i64)
380 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1)
384 !0 = !{!"clang version 3.5.0 (trunk 204257)"}
385 !1 = !{!2, !2, i64 0}
386 !2 = !{!"int", !3, i64 0}
387 !3 = !{!"omnipotent char", !4, i64 0}
388 !4 = !{!"Simple C/C++ TBAA"}
389 !5 = !{!3, !3, i64 0}
390 !6 = !{!7, !8, i64 8}
391 !7 = !{!"", !8, i64 0, !8, i64 8, !3, i64 16}
392 !8 = !{!"any pointer", !3, i64 0}