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davemgreendavemgreen
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[ARM] Additional Upper bound unrolling test. NFC
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‎llvm/test/Transforms/LoopUnroll/ARM/upperbound.ll

Lines changed: 176 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -1,14 +1,46 @@
1-
; RUN: opt -loop-unroll -S -mtriple arm-none-eabi -mcpu=cortex-m7 %s | FileCheck %s -check-prefix=UNROLL
1+
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2+
; RUN: opt -loop-unroll -simplifycfg -instcombine -simplifycfg -S -mtriple arm-none-eabi -mcpu=cortex-m7 %s | FileCheck %s
23

34
; This test is meant to check that this loop is unrolled into three iterations.
4-
5-
; UNROLL-LABEL: @test
6-
; UNROLL: load i32, i32*
7-
; UNROLL: load i32, i32*
8-
; UNROLL: load i32, i32*
9-
; UNROLL-NOT: load i32, i32*
10-
115
define void @test(i32* %x, i32 %n) {
6+
; CHECK-LABEL: @test(
7+
; CHECK-NEXT: entry:
8+
; CHECK-NEXT: [[SUB:%.*]] = add nsw i32 [[N:%.*]], -1
9+
; CHECK-NEXT: [[REM:%.*]] = srem i32 [[SUB]], 4
10+
; CHECK-NEXT: [[CMP7:%.*]] = icmp sgt i32 [[REM]], 0
11+
; CHECK-NEXT: br i1 [[CMP7]], label [[WHILE_BODY:%.*]], label [[WHILE_END:%.*]]
12+
; CHECK: while.body:
13+
; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[X:%.*]], align 4
14+
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[TMP0]], 10
15+
; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
16+
; CHECK: if.then:
17+
; CHECK-NEXT: store i32 0, i32* [[X]], align 4
18+
; CHECK-NEXT: br label [[IF_END]]
19+
; CHECK: if.end:
20+
; CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds i32, i32* [[X]], i64 1
21+
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[REM]], 1
22+
; CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY_1:%.*]], label [[WHILE_END]]
23+
; CHECK: while.end:
24+
; CHECK-NEXT: ret void
25+
; CHECK: while.body.1:
26+
; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* [[INCDEC_PTR]], align 4
27+
; CHECK-NEXT: [[CMP1_1:%.*]] = icmp slt i32 [[TMP1]], 10
28+
; CHECK-NEXT: br i1 [[CMP1_1]], label [[IF_THEN_1:%.*]], label [[IF_END_1:%.*]]
29+
; CHECK: if.then.1:
30+
; CHECK-NEXT: store i32 0, i32* [[INCDEC_PTR]], align 4
31+
; CHECK-NEXT: br label [[IF_END_1]]
32+
; CHECK: if.end.1:
33+
; CHECK-NEXT: [[INCDEC_PTR_1:%.*]] = getelementptr inbounds i32, i32* [[X]], i64 2
34+
; CHECK-NEXT: [[CMP_1:%.*]] = icmp sgt i32 [[REM]], 2
35+
; CHECK-NEXT: br i1 [[CMP_1]], label [[WHILE_BODY_2:%.*]], label [[WHILE_END]]
36+
; CHECK: while.body.2:
37+
; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[INCDEC_PTR_1]], align 4
38+
; CHECK-NEXT: [[CMP1_2:%.*]] = icmp slt i32 [[TMP2]], 10
39+
; CHECK-NEXT: br i1 [[CMP1_2]], label [[IF_THEN_2:%.*]], label [[WHILE_END]]
40+
; CHECK: if.then.2:
41+
; CHECK-NEXT: store i32 0, i32* [[INCDEC_PTR_1]], align 4
42+
; CHECK-NEXT: br label [[WHILE_END]]
43+
;
1244
entry:
1345
%sub = add nsw i32 %n, -1
1446
%rem = srem i32 %sub, 4
@@ -36,3 +68,139 @@ while.end: ; preds = %if.end, %entry
3668
ret void
3769
}
3870

71+
; Larger test that is still fully unrolled, thanks in part to the constant data and the max upper bound.
72+
@data = internal constant [50 x i32] [i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 32, i32 33, i32 34, i32 35, i32 36, i32 37, i32 38, i32 39, i32 40, i32 41, i32 42, i32 43, i32 44, i32 45, i32 46, i32 47, i32 48, i32 49, i32 50], align 4
73+
define i32 @test2(i32 %l86) {
74+
; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
76+
; CHECK-NEXT: br label [[FOR_BODY_I_I:%.*]]
77+
; CHECK: for.body.i.i:
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; CHECK-NEXT: [[I_0137_I_I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_I_3_I:%.*]], [[FOR_BODY_I_3_I:%.*]] ]
79+
; CHECK-NEXT: [[ADD_I_I:%.*]] = or i32 [[I_0137_I_I]], 1
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; CHECK-NEXT: [[TMP0:%.*]] = zext i32 [[ADD_I_I]] to i64
81+
; CHECK-NEXT: [[ARRAYIDX_I_I:%.*]] = getelementptr inbounds [50 x i32], [50 x i32]* @data, i64 0, i64 [[TMP0]]
82+
; CHECK-NEXT: [[L93:%.*]] = load i32, i32* [[ARRAYIDX_I_I]], align 4
83+
; CHECK-NEXT: [[CMP1_I_I:%.*]] = icmp sgt i32 [[L93]], [[L86:%.*]]
84+
; CHECK-NEXT: br i1 [[CMP1_I_I]], label [[LAND_LHS_TRUE_I_I:%.*]], label [[FOR_INC_I_I:%.*]]
85+
; CHECK: land.lhs.true.i.i:
86+
; CHECK-NEXT: [[TMP1:%.*]] = zext i32 [[I_0137_I_I]] to i64
87+
; CHECK-NEXT: [[ARRAYIDX2_I_I:%.*]] = getelementptr inbounds [50 x i32], [50 x i32]* @data, i64 0, i64 [[TMP1]]
88+
; CHECK-NEXT: [[L94:%.*]] = load i32, i32* [[ARRAYIDX2_I_I]], align 4
89+
; CHECK-NEXT: [[CMP3_NOT_I_I:%.*]] = icmp sgt i32 [[L94]], [[L86]]
90+
; CHECK-NEXT: br i1 [[CMP3_NOT_I_I]], label [[FOR_INC_I_I]], label [[FOR_END_I_IF_END8_I_CRIT_EDGE_I:%.*]]
91+
; CHECK: for.inc.i.i:
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; CHECK-NEXT: [[EXITCOND_NOT_I_I:%.*]] = icmp eq i32 [[ADD_I_I]], 25
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; CHECK-NEXT: br i1 [[EXITCOND_NOT_I_I]], label [[FOR_END_I_IF_END8_I_CRIT_EDGE_I]], label [[FOR_BODY_I_1_I:%.*]]
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; CHECK: for.body.i.1.i:
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; CHECK-NEXT: [[ADD_I_1_I:%.*]] = or i32 [[I_0137_I_I]], 2
96+
; CHECK-NEXT: [[TMP2:%.*]] = zext i32 [[ADD_I_1_I]] to i64
97+
; CHECK-NEXT: [[ARRAYIDX_I_1_I:%.*]] = getelementptr inbounds [50 x i32], [50 x i32]* @data, i64 0, i64 [[TMP2]]
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; CHECK-NEXT: [[L345:%.*]] = load i32, i32* [[ARRAYIDX_I_1_I]], align 4
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; CHECK-NEXT: [[CMP1_I_1_I:%.*]] = icmp sgt i32 [[L345]], [[L86]]
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; CHECK-NEXT: [[CMP1_I_1_I_NOT:%.*]] = xor i1 [[CMP1_I_1_I]], true
101+
; CHECK-NEXT: [[BRMERGE:%.*]] = or i1 [[CMP1_I_I]], [[CMP1_I_1_I_NOT]]
102+
; CHECK-NEXT: br i1 [[BRMERGE]], label [[FOR_INC_I_1_I:%.*]], label [[FOR_END_I_I:%.*]]
103+
; CHECK: for.inc.i.1.i:
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; CHECK-NEXT: [[ADD_I_2_I:%.*]] = or i32 [[I_0137_I_I]], 3
105+
; CHECK-NEXT: [[TMP3:%.*]] = zext i32 [[ADD_I_2_I]] to i64
106+
; CHECK-NEXT: [[ARRAYIDX_I_2_I:%.*]] = getelementptr inbounds [50 x i32], [50 x i32]* @data, i64 0, i64 [[TMP3]]
107+
; CHECK-NEXT: [[L346:%.*]] = load i32, i32* [[ARRAYIDX_I_2_I]], align 4
108+
; CHECK-NEXT: [[CMP1_I_2_I:%.*]] = icmp sgt i32 [[L346]], [[L86]]
109+
; CHECK-NEXT: [[CMP1_I_2_I_NOT:%.*]] = xor i1 [[CMP1_I_2_I]], true
110+
; CHECK-NEXT: [[BRMERGE1:%.*]] = or i1 [[CMP1_I_1_I]], [[CMP1_I_2_I_NOT]]
111+
; CHECK-NEXT: br i1 [[BRMERGE1]], label [[FOR_BODY_I_3_I]], label [[FOR_END_I_IF_END8_I_CRIT_EDGE_I]]
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; CHECK: for.body.i.3.i:
113+
; CHECK-NEXT: [[ADD_I_3_I]] = add nuw nsw i32 [[I_0137_I_I]], 4
114+
; CHECK-NEXT: [[TMP4:%.*]] = zext i32 [[ADD_I_3_I]] to i64
115+
; CHECK-NEXT: [[ARRAYIDX_I_3_I:%.*]] = getelementptr inbounds [50 x i32], [50 x i32]* @data, i64 0, i64 [[TMP4]]
116+
; CHECK-NEXT: [[L347:%.*]] = load i32, i32* [[ARRAYIDX_I_3_I]], align 4
117+
; CHECK-NEXT: [[CMP1_I_3_I:%.*]] = icmp sle i32 [[L347]], [[L86]]
118+
; CHECK-NEXT: [[BRMERGE2:%.*]] = or i1 [[CMP1_I_3_I]], [[CMP1_I_2_I]]
119+
; CHECK-NEXT: br i1 [[BRMERGE2]], label [[FOR_BODY_I_I]], label [[FOR_END_I_I]]
120+
; CHECK: for.end.i.i:
121+
; CHECK-NEXT: [[I_0_LCSSA_I_I:%.*]] = phi i32 [ [[ADD_I_I]], [[FOR_BODY_I_1_I]] ], [ [[ADD_I_2_I]], [[FOR_BODY_I_3_I]] ]
122+
; CHECK-NEXT: [[CMP5_I_I:%.*]] = icmp eq i32 [[I_0_LCSSA_I_I]], 25
123+
; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[CMP5_I_I]], i32 2, i32 0
124+
; CHECK-NEXT: br label [[FOR_END_I_IF_END8_I_CRIT_EDGE_I]]
125+
; CHECK: for.end.i.if.end8.i_crit_edge.i:
126+
; CHECK-NEXT: [[MERGE:%.*]] = phi i32 [ 0, [[FOR_INC_I_1_I]] ], [ 0, [[LAND_LHS_TRUE_I_I]] ], [ 1, [[FOR_INC_I_I]] ], [ [[SPEC_SELECT]], [[FOR_END_I_I]] ]
127+
; CHECK-NEXT: ret i32 [[MERGE]]
128+
;
129+
entry:
130+
br label %for.body.i.i
131+
132+
for.body.i.i: ; preds = %for.body.i.i.preheader, %for.inc.i.3.i
133+
%i.0137.i.i = phi i32 [ %add.i.3.i, %for.inc.i.3.i ], [ 0, %entry ]
134+
%add.i.i = or i32 %i.0137.i.i, 1
135+
%arrayidx.i.i = getelementptr inbounds i32, i32* getelementptr inbounds ([50 x i32], [50 x i32]* @data, i32 0, i32 0), i32 %add.i.i
136+
%l93 = load i32, i32* %arrayidx.i.i, align 4
137+
%cmp1.i.i = icmp sgt i32 %l93, %l86
138+
br i1 %cmp1.i.i, label %land.lhs.true.i.i, label %for.inc.i.i
139+
140+
land.lhs.true.i.i: ; preds = %for.body.i.i
141+
%arrayidx2.i.i = getelementptr inbounds i32, i32* getelementptr inbounds ([50 x i32], [50 x i32]* @data, i32 0, i32 0), i32 %i.0137.i.i
142+
%l94 = load i32, i32* %arrayidx2.i.i, align 4
143+
%cmp3.not.i.i = icmp sgt i32 %l94, %l86
144+
br i1 %cmp3.not.i.i, label %for.inc.i.i, label %for.end.i.if.end8.i_crit_edge.i.loopexit
145+
146+
for.inc.i.i: ; preds = %land.lhs.true.i.i, %for.body.i.i
147+
%exitcond.not.i.i = icmp eq i32 %add.i.i, 25
148+
br i1 %exitcond.not.i.i, label %if.then6.i.i.loopexitsplit, label %for.body.i.1.i
149+
150+
for.body.i.1.i: ; preds = %for.inc.i.i
151+
%add.i.1.i = or i32 %i.0137.i.i, 2
152+
%arrayidx.i.1.i = getelementptr inbounds i32, i32* getelementptr inbounds ([50 x i32], [50 x i32]* @data, i32 0, i32 0), i32 %add.i.1.i
153+
%l345 = load i32, i32* %arrayidx.i.1.i, align 4
154+
%cmp1.i.1.i = icmp sgt i32 %l345, %l86
155+
br i1 %cmp1.i.1.i, label %land.lhs.true.i.1.i, label %for.inc.i.1.i
156+
157+
land.lhs.true.i.1.i: ; preds = %for.body.i.1.i
158+
br i1 %cmp1.i.i, label %for.inc.i.1.i, label %for.end.i.i
159+
160+
for.inc.i.1.i: ; preds = %land.lhs.true.i.1.i, %for.body.i.1.i
161+
%add.i.2.i = or i32 %i.0137.i.i, 3
162+
%arrayidx.i.2.i = getelementptr inbounds i32, i32* getelementptr inbounds ([50 x i32], [50 x i32]* @data, i32 0, i32 0), i32 %add.i.2.i
163+
%l346 = load i32, i32* %arrayidx.i.2.i, align 4
164+
%cmp1.i.2.i = icmp sgt i32 %l346, %l86
165+
br i1 %cmp1.i.2.i, label %land.lhs.true.i.2.i, label %for.inc.i.2.i
166+
167+
land.lhs.true.i.2.i: ; preds = %for.inc.i.1.i
168+
br i1 %cmp1.i.1.i, label %for.inc.i.2.i, label %for.end.i.if.end8.i_crit_edge.i.loopexit
169+
170+
for.inc.i.2.i: ; preds = %land.lhs.true.i.2.i, %for.inc.i.1.i
171+
br label %for.body.i.3.i
172+
173+
for.body.i.3.i: ; preds = %for.inc.i.2.i
174+
%add.i.3.i = add nuw nsw i32 %i.0137.i.i, 4
175+
%arrayidx.i.3.i = getelementptr inbounds i32, i32* getelementptr inbounds ([50 x i32], [50 x i32]* @data, i32 0, i32 0), i32 %add.i.3.i
176+
%l347 = load i32, i32* %arrayidx.i.3.i, align 4
177+
%cmp1.i.3.i = icmp sgt i32 %l347, %l86
178+
br i1 %cmp1.i.3.i, label %land.lhs.true.i.3.i, label %for.inc.i.3.i
179+
180+
land.lhs.true.i.3.i: ; preds = %for.body.i.3.i
181+
br i1 %cmp1.i.2.i, label %for.inc.i.3.i, label %for.end.i.i
182+
183+
for.inc.i.3.i: ; preds = %land.lhs.true.i.3.i, %for.body.i.3.i
184+
br label %for.body.i.i
185+
186+
for.end.i.if.end8.i_crit_edge.i.loopexit: ; preds = %land.lhs.true.i.i, %land.lhs.true.i.2.i
187+
%i.0.lcssa.i.i3.ph = phi i32 [ %i.0137.i.i, %land.lhs.true.i.i ], [ %add.i.1.i, %land.lhs.true.i.2.i ]
188+
br label %for.end.i.if.end8.i_crit_edge.i
189+
190+
if.then6.i.i.loopexitsplit: ; preds = %for.inc.i.i
191+
br label %if.then6.i.i.loopexit
192+
193+
for.end.i.i: ; preds = %land.lhs.true.i.3.i, %land.lhs.true.i.1.i
194+
%i.0.lcssa.i.i = phi i32 [ %add.i.i, %land.lhs.true.i.1.i ], [ %add.i.2.i, %land.lhs.true.i.3.i ]
195+
%cmp5.i.i = icmp eq i32 %i.0.lcssa.i.i, 25
196+
br i1 %cmp5.i.i, label %if.then6.i.i, label %for.end.i.if.end8.i_crit_edge.i
197+
198+
for.end.i.if.end8.i_crit_edge.i:
199+
ret i32 0
200+
201+
if.then6.i.i.loopexit:
202+
ret i32 1
203+
204+
if.then6.i.i:
205+
ret i32 2
206+
}

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