1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -codegenprepare -S < %s | FileCheck %s
3 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
4 target triple = "x86_64-unknown-linux-gnu"
6 declare void @use(i32) local_unnamed_addr
7 declare void @useptr([2 x i8*]*) local_unnamed_addr
9 ; CHECK: @simple.targets = constant [2 x i8*] [i8* blockaddress(@simple, %bb0), i8* blockaddress(@simple, %bb1)], align 16
10 @simple.targets = constant [2 x i8*] [i8* blockaddress(@simple, %bb0), i8* blockaddress(@simple, %bb1)], align 16
12 ; CHECK: @multi.targets = constant [2 x i8*] [i8* blockaddress(@multi, %bb0), i8* blockaddress(@multi, %bb1)], align 16
13 @multi.targets = constant [2 x i8*] [i8* blockaddress(@multi, %bb0), i8* blockaddress(@multi, %bb1)], align 16
15 ; CHECK: @loop.targets = constant [2 x i8*] [i8* blockaddress(@loop, %bb0), i8* blockaddress(@loop, %bb1)], align 16
16 @loop.targets = constant [2 x i8*] [i8* blockaddress(@loop, %bb0), i8* blockaddress(@loop, %bb1)], align 16
18 ; CHECK: @nophi.targets = constant [2 x i8*] [i8* blockaddress(@nophi, %bb0), i8* blockaddress(@nophi, %bb1)], align 16
19 @nophi.targets = constant [2 x i8*] [i8* blockaddress(@nophi, %bb0), i8* blockaddress(@nophi, %bb1)], align 16
21 ; CHECK: @noncritical.targets = constant [2 x i8*] [i8* blockaddress(@noncritical, %bb0), i8* blockaddress(@noncritical, %bb1)], align 16
22 @noncritical.targets = constant [2 x i8*] [i8* blockaddress(@noncritical, %bb0), i8* blockaddress(@noncritical, %bb1)], align 16
24 ; Check that we break the critical edge when an jump table has only one use.
25 define void @simple(i32* nocapture readonly %p) {
26 ; CHECK-LABEL: @simple(
28 ; CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds i32, i32* [[P:%.*]], i64 1
29 ; CHECK-NEXT: [[INITVAL:%.*]] = load i32, i32* [[P]], align 4
30 ; CHECK-NEXT: [[INITOP:%.*]] = load i32, i32* [[INCDEC_PTR]], align 4
31 ; CHECK-NEXT: switch i32 [[INITOP]], label [[EXIT:%.*]] [
32 ; CHECK-NEXT: i32 0, label [[BB0_CLONE:%.*]]
33 ; CHECK-NEXT: i32 1, label [[BB1_CLONE:%.*]]
36 ; CHECK-NEXT: br label [[DOTSPLIT:%.*]]
38 ; CHECK-NEXT: [[MERGE:%.*]] = phi i32* [ [[PTR:%.*]], [[BB0:%.*]] ], [ [[INCDEC_PTR]], [[BB0_CLONE]] ]
39 ; CHECK-NEXT: [[MERGE2:%.*]] = phi i32 [ 0, [[BB0]] ], [ [[INITVAL]], [[BB0_CLONE]] ]
40 ; CHECK-NEXT: tail call void @use(i32 [[MERGE2]])
41 ; CHECK-NEXT: br label [[INDIRECTGOTO:%.*]]
43 ; CHECK-NEXT: br label [[DOTSPLIT3:%.*]]
45 ; CHECK-NEXT: [[MERGE5:%.*]] = phi i32* [ [[PTR]], [[BB1:%.*]] ], [ [[INCDEC_PTR]], [[BB1_CLONE]] ]
46 ; CHECK-NEXT: [[MERGE7:%.*]] = phi i32 [ 1, [[BB1]] ], [ [[INITVAL]], [[BB1_CLONE]] ]
47 ; CHECK-NEXT: tail call void @use(i32 [[MERGE7]])
48 ; CHECK-NEXT: br label [[INDIRECTGOTO]]
49 ; CHECK: indirectgoto:
50 ; CHECK-NEXT: [[P_ADDR_SINK:%.*]] = phi i32* [ [[MERGE5]], [[DOTSPLIT3]] ], [ [[MERGE]], [[DOTSPLIT]] ]
51 ; CHECK-NEXT: [[PTR]] = getelementptr inbounds i32, i32* [[P_ADDR_SINK]], i64 1
52 ; CHECK-NEXT: [[NEWP:%.*]] = load i32, i32* [[P_ADDR_SINK]], align 4
53 ; CHECK-NEXT: [[IDX:%.*]] = sext i32 [[NEWP]] to i64
54 ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [2 x i8*], [2 x i8*]* @simple.targets, i64 0, i64 [[IDX]]
55 ; CHECK-NEXT: [[NEWOP:%.*]] = load i8*, i8** [[ARRAYIDX]], align 8
56 ; CHECK-NEXT: indirectbr i8* [[NEWOP]], [label [[BB0]], label %bb1]
58 ; CHECK-NEXT: ret void
60 ; CHECK-NEXT: br label [[DOTSPLIT]]
62 ; CHECK-NEXT: br label [[DOTSPLIT3]]
65 %incdec.ptr = getelementptr inbounds i32, i32* %p, i64 1
66 %initval = load i32, i32* %p, align 4
67 %initop = load i32, i32* %incdec.ptr, align 4
68 switch i32 %initop, label %exit [
74 %p.addr.0 = phi i32* [ %incdec.ptr, %entry ], [ %ptr, %indirectgoto ]
75 %opcode.0 = phi i32 [ %initval, %entry ], [ 0, %indirectgoto ]
76 tail call void @use(i32 %opcode.0)
77 br label %indirectgoto
80 %p.addr.1 = phi i32* [ %incdec.ptr, %entry ], [ %ptr, %indirectgoto ]
81 %opcode.1 = phi i32 [ %initval, %entry ], [ 1, %indirectgoto ]
82 tail call void @use(i32 %opcode.1)
83 br label %indirectgoto
86 %p.addr.sink = phi i32* [ %p.addr.1, %bb1 ], [ %p.addr.0, %bb0 ]
87 %ptr = getelementptr inbounds i32, i32* %p.addr.sink, i64 1
88 %newp = load i32, i32* %p.addr.sink, align 4
89 %idx = sext i32 %newp to i64
90 %arrayidx = getelementptr inbounds [2 x i8*], [2 x i8*]* @simple.targets, i64 0, i64 %idx
91 %newop = load i8*, i8** %arrayidx, align 8
92 indirectbr i8* %newop, [label %bb0, label %bb1]
98 ; Don't try to break critical edges when several indirectbr point to a single block
99 define void @multi(i32* nocapture readonly %p) {
100 ; CHECK-LABEL: @multi(
102 ; CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds i32, i32* [[P:%.*]], i64 1
103 ; CHECK-NEXT: [[INITVAL:%.*]] = load i32, i32* [[P]], align 4
104 ; CHECK-NEXT: [[INITOP:%.*]] = load i32, i32* [[INCDEC_PTR]], align 4
105 ; CHECK-NEXT: switch i32 [[INITOP]], label [[EXIT:%.*]] [
106 ; CHECK-NEXT: i32 0, label [[BB0:%.*]]
107 ; CHECK-NEXT: i32 1, label [[BB1:%.*]]
110 ; CHECK-NEXT: [[P_ADDR_0:%.*]] = phi i32* [ [[INCDEC_PTR]], [[ENTRY:%.*]] ], [ [[NEXT0:%.*]], [[BB0]] ], [ [[NEXT1:%.*]], [[BB1]] ]
111 ; CHECK-NEXT: [[OPCODE_0:%.*]] = phi i32 [ [[INITVAL]], [[ENTRY]] ], [ 0, [[BB0]] ], [ 1, [[BB1]] ]
112 ; CHECK-NEXT: tail call void @use(i32 [[OPCODE_0]])
113 ; CHECK-NEXT: [[NEXT0]] = getelementptr inbounds i32, i32* [[P_ADDR_0]], i64 1
114 ; CHECK-NEXT: [[NEWP0:%.*]] = load i32, i32* [[P_ADDR_0]], align 4
115 ; CHECK-NEXT: [[IDX0:%.*]] = sext i32 [[NEWP0]] to i64
116 ; CHECK-NEXT: [[ARRAYIDX0:%.*]] = getelementptr inbounds [2 x i8*], [2 x i8*]* @multi.targets, i64 0, i64 [[IDX0]]
117 ; CHECK-NEXT: [[NEWOP0:%.*]] = load i8*, i8** [[ARRAYIDX0]], align 8
118 ; CHECK-NEXT: indirectbr i8* [[NEWOP0]], [label [[BB0]], label %bb1]
120 ; CHECK-NEXT: [[P_ADDR_1:%.*]] = phi i32* [ [[INCDEC_PTR]], [[ENTRY]] ], [ [[NEXT0]], [[BB0]] ], [ [[NEXT1]], [[BB1]] ]
121 ; CHECK-NEXT: [[OPCODE_1:%.*]] = phi i32 [ [[INITVAL]], [[ENTRY]] ], [ 0, [[BB0]] ], [ 1, [[BB1]] ]
122 ; CHECK-NEXT: tail call void @use(i32 [[OPCODE_1]])
123 ; CHECK-NEXT: [[NEXT1]] = getelementptr inbounds i32, i32* [[P_ADDR_1]], i64 1
124 ; CHECK-NEXT: [[NEWP1:%.*]] = load i32, i32* [[P_ADDR_1]], align 4
125 ; CHECK-NEXT: [[IDX1:%.*]] = sext i32 [[NEWP1]] to i64
126 ; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds [2 x i8*], [2 x i8*]* @multi.targets, i64 0, i64 [[IDX1]]
127 ; CHECK-NEXT: [[NEWOP1:%.*]] = load i8*, i8** [[ARRAYIDX1]], align 8
128 ; CHECK-NEXT: indirectbr i8* [[NEWOP1]], [label [[BB0]], label %bb1]
130 ; CHECK-NEXT: ret void
133 %incdec.ptr = getelementptr inbounds i32, i32* %p, i64 1
134 %initval = load i32, i32* %p, align 4
135 %initop = load i32, i32* %incdec.ptr, align 4
136 switch i32 %initop, label %exit [
142 %p.addr.0 = phi i32* [ %incdec.ptr, %entry ], [ %next0, %bb0 ], [ %next1, %bb1 ]
143 %opcode.0 = phi i32 [ %initval, %entry ], [ 0, %bb0 ], [ 1, %bb1 ]
144 tail call void @use(i32 %opcode.0)
145 %next0 = getelementptr inbounds i32, i32* %p.addr.0, i64 1
146 %newp0 = load i32, i32* %p.addr.0, align 4
147 %idx0 = sext i32 %newp0 to i64
148 %arrayidx0 = getelementptr inbounds [2 x i8*], [2 x i8*]* @multi.targets, i64 0, i64 %idx0
149 %newop0 = load i8*, i8** %arrayidx0, align 8
150 indirectbr i8* %newop0, [label %bb0, label %bb1]
153 %p.addr.1 = phi i32* [ %incdec.ptr, %entry ], [ %next0, %bb0 ], [ %next1, %bb1 ]
154 %opcode.1 = phi i32 [ %initval, %entry ], [ 0, %bb0 ], [ 1, %bb1 ]
155 tail call void @use(i32 %opcode.1)
156 %next1 = getelementptr inbounds i32, i32* %p.addr.1, i64 1
157 %newp1 = load i32, i32* %p.addr.1, align 4
158 %idx1 = sext i32 %newp1 to i64
159 %arrayidx1 = getelementptr inbounds [2 x i8*], [2 x i8*]* @multi.targets, i64 0, i64 %idx1
160 %newop1 = load i8*, i8** %arrayidx1, align 8
161 indirectbr i8* %newop1, [label %bb0, label %bb1]
167 ; Make sure we do the right thing for cases where the indirectbr branches to
168 ; the block it terminates.
169 define void @loop(i64* nocapture readonly %p) {
170 ; CHECK-LABEL: @loop(
172 ; CHECK-NEXT: br label [[DOTSPLIT:%.*]]
174 ; CHECK-NEXT: br label [[DOTSPLIT]]
176 ; CHECK-NEXT: [[MERGE:%.*]] = phi i64 [ [[I_NEXT:%.*]], [[BB0:%.*]] ], [ 0, [[BB0_CLONE:%.*]] ]
177 ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds i64, i64* [[P:%.*]], i64 [[MERGE]]
178 ; CHECK-NEXT: store i64 [[MERGE]], i64* [[TMP0]], align 4
179 ; CHECK-NEXT: [[I_NEXT]] = add nuw nsw i64 [[MERGE]], 1
180 ; CHECK-NEXT: [[IDX:%.*]] = srem i64 [[MERGE]], 2
181 ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [2 x i8*], [2 x i8*]* @loop.targets, i64 0, i64 [[IDX]]
182 ; CHECK-NEXT: [[TARGET:%.*]] = load i8*, i8** [[ARRAYIDX]], align 8
183 ; CHECK-NEXT: indirectbr i8* [[TARGET]], [label [[BB0]], label %bb1]
185 ; CHECK-NEXT: ret void
191 %i = phi i64 [ %i.next, %bb0 ], [ 0, %entry ]
192 %tmp0 = getelementptr inbounds i64, i64* %p, i64 %i
193 store i64 %i, i64* %tmp0, align 4
194 %i.next = add nuw nsw i64 %i, 1
195 %idx = srem i64 %i, 2
196 %arrayidx = getelementptr inbounds [2 x i8*], [2 x i8*]* @loop.targets, i64 0, i64 %idx
197 %target = load i8*, i8** %arrayidx, align 8
198 indirectbr i8* %target, [label %bb0, label %bb1]
204 ; Don't do anything for cases that contain no phis.
205 define void @nophi(i32* %p) {
206 ; CHECK-LABEL: @nophi(
208 ; CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds i32, i32* [[P:%.*]], i64 1
209 ; CHECK-NEXT: [[INITOP:%.*]] = load i32, i32* [[INCDEC_PTR]], align 4
210 ; CHECK-NEXT: switch i32 [[INITOP]], label [[EXIT:%.*]] [
211 ; CHECK-NEXT: i32 0, label [[BB0:%.*]]
212 ; CHECK-NEXT: i32 1, label [[BB1:%.*]]
215 ; CHECK-NEXT: tail call void @use(i32 0)
216 ; CHECK-NEXT: br label [[INDIRECTGOTO:%.*]]
218 ; CHECK-NEXT: tail call void @use(i32 1)
219 ; CHECK-NEXT: br label [[INDIRECTGOTO]]
220 ; CHECK: indirectgoto:
221 ; CHECK-NEXT: [[TMP0:%.*]] = bitcast i32* [[P]] to i8*
222 ; CHECK-NEXT: [[SUNKADDR:%.*]] = getelementptr inbounds i8, i8* [[TMP0]], i64 4
223 ; CHECK-NEXT: [[TMP1:%.*]] = bitcast i8* [[SUNKADDR]] to i32*
224 ; CHECK-NEXT: [[NEWP:%.*]] = load i32, i32* [[TMP1]], align 4
225 ; CHECK-NEXT: [[IDX:%.*]] = sext i32 [[NEWP]] to i64
226 ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [2 x i8*], [2 x i8*]* @nophi.targets, i64 0, i64 [[IDX]]
227 ; CHECK-NEXT: [[NEWOP:%.*]] = load i8*, i8** [[ARRAYIDX]], align 8
228 ; CHECK-NEXT: indirectbr i8* [[NEWOP]], [label [[BB0]], label %bb1]
230 ; CHECK-NEXT: ret void
233 %incdec.ptr = getelementptr inbounds i32, i32* %p, i64 1
234 %initop = load i32, i32* %incdec.ptr, align 4
235 switch i32 %initop, label %exit [
241 tail call void @use(i32 0) br label %indirectgoto
244 tail call void @use(i32 1)
245 br label %indirectgoto
248 %newp = load i32, i32* %incdec.ptr, align 4
249 %idx = sext i32 %newp to i64
250 %arrayidx = getelementptr inbounds [2 x i8*], [2 x i8*]* @nophi.targets, i64 0, i64 %idx
251 %newop = load i8*, i8** %arrayidx, align 8
252 indirectbr i8* %newop, [label %bb0, label %bb1]
258 ; Don't do anything if the edge isn't critical.
259 define i32 @noncritical(i32 %k, i8* %p)
260 ; CHECK-LABEL: @noncritical(
262 ; CHECK-NEXT: [[D:%.*]] = add i32 [[K:%.*]], 1
263 ; CHECK-NEXT: indirectbr i8* [[P:%.*]], [label [[BB0:%.*]], label %bb1]
265 ; CHECK-NEXT: [[R0:%.*]] = sub i32 [[K]], [[D]]
266 ; CHECK-NEXT: br label [[EXIT:%.*]]
268 ; CHECK-NEXT: [[R1:%.*]] = sub i32 [[D]], [[K]]
269 ; CHECK-NEXT: br label [[EXIT]]
271 ; CHECK-NEXT: [[V:%.*]] = phi i32 [ [[R0]], [[BB0]] ], [ [[R1]], [[BB1:%.*]] ]
272 ; CHECK-NEXT: ret i32 0
277 indirectbr i8* %p, [label %bb0, label %bb1]
280 %v00 = phi i32 [%k, %entry]
281 %v01 = phi i32 [%d, %entry]
282 %r0 = sub i32 %v00, %v01
286 %v10 = phi i32 [%d, %entry]
287 %v11 = phi i32 [%k, %entry]
288 %r1 = sub i32 %v10, %v11
292 %v = phi i32 [%r0, %bb0], [%r1, %bb1]