| blob | fc80bcaa3b2965ea64e3964dd89835737e389b1e |
1 ; RUN: llc < %s -block-placement-exit-block-bias=20 -no-phi-elim-live-out-early-exit | FileCheck %s
2 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
3 target triple = "x86_64-apple-macosx10.9.0"
5 ; This is longest_match, the hot function from zlib's deflate implementation.
7 %struct.internal_state = type { %struct.z_stream_s*, i32, i8*, i64, i8*, i32, i32, %struct.gz_header_s*, i32, i8, i32, i32, i32, i32, i8*, i64, i16*, i16*, i32, i32, i32, i32, i32, i64, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, [573 x %struct.ct_data_s], [61 x %struct.ct_data_s], [39 x %struct.ct_data_s], %struct.tree_desc_s, %struct.tree_desc_s, %struct.tree_desc_s, [16 x i16], [573 x i32], i32, i32, [573 x i8], i8*, i32, i32, i16*, i64, i64, i32, i32, i16, i32, i64 }
8 %struct.z_stream_s = type { i8*, i32, i64, i8*, i32, i64, i8*, %struct.internal_state*, i8* (i8*, i32, i32)*, void (i8*, i8*)*, i8*, i32, i64, i64 }
9 %struct.gz_header_s = type { i32, i64, i32, i32, i8*, i32, i32, i8*, i32, i8*, i32, i32, i32 }
10 %struct.ct_data_s = type { %union.anon, %union.anon.0 }
11 %union.anon = type { i16 }
12 %union.anon.0 = type { i16 }
13 %struct.tree_desc_s = type { %struct.ct_data_s*, i32, %struct.static_tree_desc_s* }
14 %struct.static_tree_desc_s = type { i32 }
16 ; CHECK-LABEL: longest_match:
18 ; Verify that there are no spills or reloads in the loop exit block. This loop
19 ; is mostly cold, only %do.cond125 and %land.rhs131 are hot.
20 ; CHECK: %do.cond125
21 ; CHECK-NOT: {{Spill|Reload}}
22 ; CHECK: jbe
24 ; Verify that block placement doesn't destroy source order. It's important that
25 ; the two hot blocks are laid out close to each other.
26 ; CHECK-NEXT: %land.rhs131
27 ; CHECK: jne
28 define i32 @longest_match(%struct.internal_state* nocapture %s, i32 %cur_match) nounwind {
29 entry:
30 %max_chain_length = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 31
31 %0 = load i32, i32* %max_chain_length, align 4
32 %window = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 14
33 %1 = load i8*, i8** %window, align 8
34 %strstart = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 27
35 %2 = load i32, i32* %strstart, align 4
36 %idx.ext = zext i32 %2 to i64
37 %add.ptr = getelementptr inbounds i8, i8* %1, i64 %idx.ext
38 %prev_length = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 30
39 %3 = load i32, i32* %prev_length, align 4
40 %nice_match1 = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 36
41 %4 = load i32, i32* %nice_match1, align 4
42 %w_size = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 11
43 %5 = load i32, i32* %w_size, align 4
44 %sub = add i32 %5, -262
45 %cmp = icmp ugt i32 %2, %sub
46 %sub6 = sub i32 %2, %sub
47 %sub6. = select i1 %cmp, i32 %sub6, i32 0
48 %prev7 = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 16
49 %6 = load i16*, i16** %prev7, align 8
50 %w_mask = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 13
51 %7 = load i32, i32* %w_mask, align 4
52 %add.ptr11.sum = add i64 %idx.ext, 258
53 %add.ptr12 = getelementptr inbounds i8, i8* %1, i64 %add.ptr11.sum
54 %sub13 = add nsw i32 %3, -1
55 %idxprom = sext i32 %sub13 to i64
56 %add.ptr.sum = add i64 %idxprom, %idx.ext
57 %arrayidx = getelementptr inbounds i8, i8* %1, i64 %add.ptr.sum
58 %8 = load i8, i8* %arrayidx, align 1
59 %idxprom14 = sext i32 %3 to i64
60 %add.ptr.sum213 = add i64 %idxprom14, %idx.ext
61 %arrayidx15 = getelementptr inbounds i8, i8* %1, i64 %add.ptr.sum213
62 %9 = load i8, i8* %arrayidx15, align 1
63 %good_match = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 35
64 %10 = load i32, i32* %good_match, align 4
65 %cmp17 = icmp ult i32 %3, %10
66 %shr = lshr i32 %0, 2
67 %chain_length.0 = select i1 %cmp17, i32 %0, i32 %shr
68 %lookahead = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 29
69 %11 = load i32, i32* %lookahead, align 4
70 %cmp18 = icmp ugt i32 %4, %11
71 %. = select i1 %cmp18, i32 %11, i32 %4
72 %match_start = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 28
73 %add.ptr.sum217 = add i64 %idx.ext, 1
74 %arrayidx44 = getelementptr inbounds i8, i8* %1, i64 %add.ptr.sum217
75 %add.ptr.sum218 = add i64 %idx.ext, 2
76 %add.ptr50 = getelementptr inbounds i8, i8* %1, i64 %add.ptr.sum218
77 %sub.ptr.lhs.cast = ptrtoint i8* %add.ptr12 to i64
78 br label %do.body
80 do.body: ; preds = %land.rhs131, %entry
81 %best_len.0 = phi i32 [ %best_len.1, %land.rhs131 ], [ %3, %entry ]
82 %chain_length.1 = phi i32 [ %dec, %land.rhs131 ], [ %chain_length.0, %entry ]
83 %cur_match.addr.0 = phi i32 [ %conv128, %land.rhs131 ], [ %cur_match, %entry ]
84 %scan_end1.0 = phi i8 [ %scan_end1.1, %land.rhs131 ], [ %8, %entry ]
85 %scan_end.0 = phi i8 [ %scan_end.1, %land.rhs131 ], [ %9, %entry ]
86 %idx.ext23 = zext i32 %cur_match.addr.0 to i64
87 %add.ptr24 = getelementptr inbounds i8, i8* %1, i64 %idx.ext23
88 %idxprom25 = sext i32 %best_len.0 to i64
89 %add.ptr24.sum = add i64 %idx.ext23, %idxprom25
90 %arrayidx26 = getelementptr inbounds i8, i8* %1, i64 %add.ptr24.sum
91 %12 = load i8, i8* %arrayidx26, align 1
92 %cmp28 = icmp eq i8 %12, %scan_end.0
93 br i1 %cmp28, label %lor.lhs.false, label %do.cond125
95 lor.lhs.false: ; preds = %do.body
96 %sub30 = add nsw i32 %best_len.0, -1
97 %idxprom31 = sext i32 %sub30 to i64
98 %add.ptr24.sum214 = add i64 %idx.ext23, %idxprom31
99 %arrayidx32 = getelementptr inbounds i8, i8* %1, i64 %add.ptr24.sum214
100 %13 = load i8, i8* %arrayidx32, align 1
101 %cmp35 = icmp eq i8 %13, %scan_end1.0
102 br i1 %cmp35, label %lor.lhs.false37, label %do.cond125
104 lor.lhs.false37: ; preds = %lor.lhs.false
105 %14 = load i8, i8* %add.ptr24, align 1
106 %15 = load i8, i8* %add.ptr, align 1
107 %cmp40 = icmp eq i8 %14, %15
108 br i1 %cmp40, label %lor.lhs.false42, label %do.cond125
110 lor.lhs.false42: ; preds = %lor.lhs.false37
111 %add.ptr24.sum215 = add i64 %idx.ext23, 1
112 %incdec.ptr = getelementptr inbounds i8, i8* %1, i64 %add.ptr24.sum215
113 %16 = load i8, i8* %incdec.ptr, align 1
114 %17 = load i8, i8* %arrayidx44, align 1
115 %cmp46 = icmp eq i8 %16, %17
116 br i1 %cmp46, label %if.end49, label %do.cond125
118 if.end49: ; preds = %lor.lhs.false42
119 %incdec.ptr.sum = add i64 %idx.ext23, 2
120 %incdec.ptr51 = getelementptr inbounds i8, i8* %1, i64 %incdec.ptr.sum
121 br label %do.cond
123 do.cond: ; preds = %land.lhs.true100, %if.end49
124 %match.0 = phi i8* [ %incdec.ptr51, %if.end49 ], [ %incdec.ptr103, %land.lhs.true100 ]
125 %scan.1 = phi i8* [ %add.ptr50, %if.end49 ], [ %incdec.ptr101, %land.lhs.true100 ]
126 %incdec.ptr53 = getelementptr inbounds i8, i8* %scan.1, i64 1
127 %18 = load i8, i8* %incdec.ptr53, align 1
128 %incdec.ptr55 = getelementptr inbounds i8, i8* %match.0, i64 1
129 %19 = load i8, i8* %incdec.ptr55, align 1
130 %cmp57 = icmp eq i8 %18, %19
131 br i1 %cmp57, label %land.lhs.true, label %do.end
133 land.lhs.true: ; preds = %do.cond
134 %incdec.ptr59 = getelementptr inbounds i8, i8* %scan.1, i64 2
135 %20 = load i8, i8* %incdec.ptr59, align 1
136 %incdec.ptr61 = getelementptr inbounds i8, i8* %match.0, i64 2
137 %21 = load i8, i8* %incdec.ptr61, align 1
138 %cmp63 = icmp eq i8 %20, %21
139 br i1 %cmp63, label %land.lhs.true65, label %do.end
141 land.lhs.true65: ; preds = %land.lhs.true
142 %incdec.ptr66 = getelementptr inbounds i8, i8* %scan.1, i64 3
143 %22 = load i8, i8* %incdec.ptr66, align 1
144 %incdec.ptr68 = getelementptr inbounds i8, i8* %match.0, i64 3
145 %23 = load i8, i8* %incdec.ptr68, align 1
146 %cmp70 = icmp eq i8 %22, %23
147 br i1 %cmp70, label %land.lhs.true72, label %do.end
149 land.lhs.true72: ; preds = %land.lhs.true65
150 %incdec.ptr73 = getelementptr inbounds i8, i8* %scan.1, i64 4
151 %24 = load i8, i8* %incdec.ptr73, align 1
152 %incdec.ptr75 = getelementptr inbounds i8, i8* %match.0, i64 4
153 %25 = load i8, i8* %incdec.ptr75, align 1
154 %cmp77 = icmp eq i8 %24, %25
155 br i1 %cmp77, label %land.lhs.true79, label %do.end
157 land.lhs.true79: ; preds = %land.lhs.true72
158 %incdec.ptr80 = getelementptr inbounds i8, i8* %scan.1, i64 5
159 %26 = load i8, i8* %incdec.ptr80, align 1
160 %incdec.ptr82 = getelementptr inbounds i8, i8* %match.0, i64 5
161 %27 = load i8, i8* %incdec.ptr82, align 1
162 %cmp84 = icmp eq i8 %26, %27
163 br i1 %cmp84, label %land.lhs.true86, label %do.end
165 land.lhs.true86: ; preds = %land.lhs.true79
166 %incdec.ptr87 = getelementptr inbounds i8, i8* %scan.1, i64 6
167 %28 = load i8, i8* %incdec.ptr87, align 1
168 %incdec.ptr89 = getelementptr inbounds i8, i8* %match.0, i64 6
169 %29 = load i8, i8* %incdec.ptr89, align 1
170 %cmp91 = icmp eq i8 %28, %29
171 br i1 %cmp91, label %land.lhs.true93, label %do.end
173 land.lhs.true93: ; preds = %land.lhs.true86
174 %incdec.ptr94 = getelementptr inbounds i8, i8* %scan.1, i64 7
175 %30 = load i8, i8* %incdec.ptr94, align 1
176 %incdec.ptr96 = getelementptr inbounds i8, i8* %match.0, i64 7
177 %31 = load i8, i8* %incdec.ptr96, align 1
178 %cmp98 = icmp eq i8 %30, %31
179 br i1 %cmp98, label %land.lhs.true100, label %do.end
181 land.lhs.true100: ; preds = %land.lhs.true93
182 %incdec.ptr101 = getelementptr inbounds i8, i8* %scan.1, i64 8
183 %32 = load i8, i8* %incdec.ptr101, align 1
184 %incdec.ptr103 = getelementptr inbounds i8, i8* %match.0, i64 8
185 %33 = load i8, i8* %incdec.ptr103, align 1
186 %cmp105 = icmp eq i8 %32, %33
187 %cmp107 = icmp ult i8* %incdec.ptr101, %add.ptr12
188 %or.cond = and i1 %cmp105, %cmp107
189 br i1 %or.cond, label %do.cond, label %do.end
191 do.end: ; preds = %land.lhs.true100, %land.lhs.true93, %land.lhs.true86, %land.lhs.true79, %land.lhs.true72, %land.lhs.true65, %land.lhs.true, %do.cond
192 %scan.2 = phi i8* [ %incdec.ptr101, %land.lhs.true100 ], [ %incdec.ptr94, %land.lhs.true93 ], [ %incdec.ptr87, %land.lhs.true86 ], [ %incdec.ptr80, %land.lhs.true79 ], [ %incdec.ptr73, %land.lhs.true72 ], [ %incdec.ptr66, %land.lhs.true65 ], [ %incdec.ptr59, %land.lhs.true ], [ %incdec.ptr53, %do.cond ]
193 %sub.ptr.rhs.cast = ptrtoint i8* %scan.2 to i64
194 %sub.ptr.sub = sub i64 %sub.ptr.lhs.cast, %sub.ptr.rhs.cast
195 %conv109 = trunc i64 %sub.ptr.sub to i32
196 %sub110 = sub nsw i32 258, %conv109
197 %cmp112 = icmp sgt i32 %sub110, %best_len.0
198 br i1 %cmp112, label %if.then114, label %do.cond125
200 if.then114: ; preds = %do.end
201 store i32 %cur_match.addr.0, i32* %match_start, align 4
202 %cmp115 = icmp slt i32 %sub110, %.
203 br i1 %cmp115, label %if.end118, label %do.end135
205 if.end118: ; preds = %if.then114
206 %sub119 = add nsw i32 %sub110, -1
207 %idxprom120 = sext i32 %sub119 to i64
208 %add.ptr111.sum = add i64 %idxprom120, %idx.ext
209 %arrayidx121 = getelementptr inbounds i8, i8* %1, i64 %add.ptr111.sum
210 %34 = load i8, i8* %arrayidx121, align 1
211 %idxprom122 = sext i32 %sub110 to i64
212 %add.ptr111.sum216 = add i64 %idxprom122, %idx.ext
213 %arrayidx123 = getelementptr inbounds i8, i8* %1, i64 %add.ptr111.sum216
214 %35 = load i8, i8* %arrayidx123, align 1
215 br label %do.cond125
217 do.cond125: ; preds = %if.end118, %do.end, %lor.lhs.false42, %lor.lhs.false37, %lor.lhs.false, %do.body
218 %best_len.1 = phi i32 [ %best_len.0, %do.body ], [ %best_len.0, %lor.lhs.false ], [ %best_len.0, %lor.lhs.false37 ], [ %best_len.0, %lor.lhs.false42 ], [ %sub110, %if.end118 ], [ %best_len.0, %do.end ]
219 %scan_end1.1 = phi i8 [ %scan_end1.0, %do.body ], [ %scan_end1.0, %lor.lhs.false ], [ %scan_end1.0, %lor.lhs.false37 ], [ %scan_end1.0, %lor.lhs.false42 ], [ %34, %if.end118 ], [ %scan_end1.0, %do.end ]
220 %scan_end.1 = phi i8 [ %scan_end.0, %do.body ], [ %scan_end.0, %lor.lhs.false ], [ %scan_end.0, %lor.lhs.false37 ], [ %scan_end.0, %lor.lhs.false42 ], [ %35, %if.end118 ], [ %scan_end.0, %do.end ]
221 %and = and i32 %cur_match.addr.0, %7
222 %idxprom126 = zext i32 %and to i64
223 %arrayidx127 = getelementptr inbounds i16, i16* %6, i64 %idxprom126
224 %36 = load i16, i16* %arrayidx127, align 2
225 %conv128 = zext i16 %36 to i32
226 %cmp129 = icmp ugt i32 %conv128, %sub6.
227 br i1 %cmp129, label %land.rhs131, label %do.end135
229 land.rhs131: ; preds = %do.cond125
230 %dec = add i32 %chain_length.1, -1
231 %cmp132 = icmp eq i32 %dec, 0
232 br i1 %cmp132, label %do.end135, label %do.body
234 do.end135: ; preds = %land.rhs131, %do.cond125, %if.then114
235 %best_len.2 = phi i32 [ %best_len.1, %land.rhs131 ], [ %best_len.1, %do.cond125 ], [ %sub110, %if.then114 ]
236 %cmp137 = icmp ugt i32 %best_len.2, %11
237 %.best_len.2 = select i1 %cmp137, i32 %11, i32 %best_len.2
238 ret i32 %.best_len.2
239 }