1 ; RUN: llc < %s -mtriple=i686-- -disable-block-placement | FileCheck %s
3 ; Test RegistersDefinedFromSameValue. We have multiple copies of the same vreg:
7 ; critical edge from land.lhs.true.i -> if.end117.i:
9 ; critical edge from land.lhs.true103.i -> if.end117.i:
14 ; Prior to fixing PR10920 401.bzip miscompile, the coalescer would
15 ; consider %1 and %27 to be copies of the same value. It would
16 ; then remove one of the critical edge copes, which cannot safely be removed.
18 ; There are two obvious ways the register-allocator could go here, either
19 ; reusing the pre-addition register later, or the post-addition one. Currently,
20 ; it does the latter, so we check:
22 ; CHECK: # %while.body85.i{{$}}
25 ; CHECK: movl %[[POSTR:e[abcdxi]+]], %[[PRER:e[abcdxi]+]]
26 ; CHECK: addl %{{.*}}, %[[POSTR]]
27 ; CHECK: # %while.end.i
28 ; CHECK-NOT: movl %[[POSTR]]
29 ; CHECK: # %land.lhs.true.i
30 ; CHECK-NOT: movl %[[POSTR]]
31 ; CHECK: # %land.lhs.true103.i
32 ; CHECK-NOT: movl %[[POSTR]]
33 ; CHECK: # %if.then108.i
34 ; CHECK: movl %[[PRER]], %[[POSTR]]
35 ; CHECK: # %if.end117.i
36 ; and use it for fprintf:
37 ; CHECK: movl %[[POSTR]], 12(%esp)
40 ; If it ever reverts to reusing the pre-addition register then we should
41 ; *probably* check this instead (it certainly worked last time):
43 ; CHECKALT: # %while.body85.i
46 ; CHECKALT: movl %[[POSTR:e[abcdxi]+]], %[[PRER:e[abcdxi]+]]
47 ; CHECKALT: addl %{{.*}}, %[[POSTR]]
48 ; CHECKALT: # %while.end.i
49 ; CHECKALT: movl %[[POSTR]], %[[USER:e[abcdxi]+]]
50 ; CHECKALT: # %land.lhs.true.i
51 ; CHECKALT: movl %[[POSTR]], %[[USER]]
52 ; CHECKALT: # %land.lhs.true103.i
53 ; CHECKALT: movl %[[POSTR]], %[[USER]]
54 ; CHECKALT: # %if.then108.i
55 ; [[PRER] live out, so nothing on this path should define it.
56 ; CHECKALT-NOT: , %[[PRER]]
57 ; CHECKALT: # %if.end117.i
59 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
61 @.str3 = external unnamed_addr constant [59 x i8], align 1
63 define void @BZ2_compressBlock() nounwind ssp {
65 br i1 undef, label %if.then68, label %if.end85
67 if.then68: ; preds = %entry
68 br label %for.body.i.i
70 for.body.i.i: ; preds = %for.inc.i.i, %if.then68
71 br i1 undef, label %for.inc.i.i, label %if.then.i.i
73 if.then.i.i: ; preds = %for.body.i.i
76 for.inc.i.i: ; preds = %if.then.i.i, %for.body.i.i
77 br i1 undef, label %makeMaps_e.exit.i, label %for.body.i.i
79 makeMaps_e.exit.i: ; preds = %for.inc.i.i
80 br i1 undef, label %for.cond19.preheader.i, label %for.cond.for.cond19.preheader_crit_edge.i
82 for.cond.for.cond19.preheader_crit_edge.i: ; preds = %makeMaps_e.exit.i
85 for.cond19.preheader.i: ; preds = %makeMaps_e.exit.i
86 br i1 undef, label %for.body25.lr.ph.i, label %for.cond33.preheader.i
88 for.body25.lr.ph.i: ; preds = %for.cond19.preheader.i
89 br label %for.body25.i
91 for.cond33.preheader.i: ; preds = %for.body25.i, %for.cond19.preheader.i
92 br i1 undef, label %if.then.i, label %if.end.i
94 for.body25.i: ; preds = %for.body25.i, %for.body25.lr.ph.i
95 br i1 undef, label %for.body25.i, label %for.cond33.preheader.i
97 if.then.i: ; preds = %for.cond33.preheader.i
100 if.end.i: ; preds = %if.then.i, %for.cond33.preheader.i
101 br i1 undef, label %for.inc27.us.5.i, label %for.end30.i
103 for.end30.i: ; preds = %for.inc27.us.5.i, %if.end.i
104 br i1 undef, label %if.end36.i, label %if.then35.i
106 if.then35.i: ; preds = %for.end30.i
109 if.end36.i: ; preds = %for.end30.i
110 %sub83.i = add nsw i32 undef, 1
111 br label %while.body.i188
113 for.cond182.preheader.i: ; preds = %for.end173.i
114 br i1 undef, label %for.inc220.us.i, label %while.body300.preheader.i
116 while.body.i188: ; preds = %for.end173.i, %if.end36.i
117 %gs.0526.i = phi i32 [ 0, %if.end36.i ], [ %add177.i, %for.end173.i ]
118 %or.cond514517.i = and i1 false, undef
119 br i1 %or.cond514517.i, label %while.body85.i, label %if.end117.i
121 while.body85.i: ; preds = %while.body85.i, %while.body.i188
122 %aFreq.0518.i = phi i32 [ %add93.i, %while.body85.i ], [ 0, %while.body.i188 ]
123 %inc87.i = add nsw i32 0, 1
124 %tmp91.i = load i32, i32* undef, align 4
125 %add93.i = add nsw i32 %tmp91.i, %aFreq.0518.i
126 %or.cond514.i = and i1 undef, false
127 br i1 %or.cond514.i, label %while.body85.i, label %while.end.i
129 while.end.i: ; preds = %while.body85.i
130 br i1 undef, label %land.lhs.true.i, label %if.end117.i
132 land.lhs.true.i: ; preds = %while.end.i
133 br i1 undef, label %land.lhs.true103.i, label %if.end117.i
135 land.lhs.true103.i: ; preds = %land.lhs.true.i
136 br i1 undef, label %if.then108.i, label %if.end117.i
138 if.then108.i: ; preds = %land.lhs.true103.i
139 br label %if.end117.i
141 if.end117.i: ; preds = %if.then108.i, %land.lhs.true103.i, %land.lhs.true.i, %while.end.i, %while.body.i188
142 %aFreq.1.i = phi i32 [ %aFreq.0518.i, %if.then108.i ], [ %add93.i, %land.lhs.true103.i ], [ %add93.i, %land.lhs.true.i ], [ %add93.i, %while.end.i ], [ 0, %while.body.i188 ]
143 %ge.1.i = phi i32 [ 0, %if.then108.i ], [ %inc87.i, %land.lhs.true103.i ], [ %inc87.i, %land.lhs.true.i ], [ %inc87.i, %while.end.i ], [ 0, %while.body.i188 ]
144 br i1 undef, label %if.then122.i, label %for.cond138.preheader.i
146 if.then122.i: ; preds = %if.end117.i
147 call void (...) @fprintf(i32 undef, i32 %gs.0526.i, i32 %ge.1.i, i32 %aFreq.1.i, double undef) nounwind
148 br label %for.cond138.preheader.i
150 for.cond138.preheader.i: ; preds = %if.then122.i, %if.end117.i
151 br i1 undef, label %for.body143.lr.ph.i, label %for.end173.i
153 for.body143.lr.ph.i: ; preds = %for.cond138.preheader.i
154 br label %for.body143.i
156 for.body143.i: ; preds = %for.body143.i, %for.body143.lr.ph.i
157 br i1 undef, label %for.end173.i, label %for.body143.i
159 for.end173.i: ; preds = %for.body143.i, %for.cond138.preheader.i
160 %add177.i = add nsw i32 %ge.1.i, 1
161 %cmp73.i = icmp sgt i32 undef, 0
162 br i1 %cmp73.i, label %while.body.i188, label %for.cond182.preheader.i
164 for.inc220.us.i: ; preds = %for.cond182.preheader.i
167 while.body300.preheader.i: ; preds = %for.cond182.preheader.i
168 br i1 undef, label %for.end335.i, label %while.end2742.i
170 for.end335.i: ; preds = %for.end2039.i, %while.body300.preheader.i
171 br label %for.body2021.i
173 for.body2021.i: ; preds = %for.body2021.i, %for.end335.i
174 br i1 undef, label %for.body2021.i, label %for.end2039.i
176 for.end2039.i: ; preds = %for.body2021.i
177 br label %for.end335.i
179 while.end2742.i: ; preds = %while.body300.preheader.i
180 br i1 undef, label %if.then2748.i, label %for.body2778.i
182 if.then2748.i: ; preds = %while.end2742.i
185 for.body2778.i: ; preds = %while.end2742.i
188 for.inc27.us.5.i: ; preds = %if.end.i
189 br label %for.end30.i
191 if.end85: ; preds = %entry
195 declare void @fprintf(...) nounwind