2 ; RUN: opt -S -passes=loop-vectorize -force-vector-width=8 -force-vector-interleave=1 -enable-interleaved-mem-accesses -debug-only=loop-vectorize,vectorutils -disable-output < %s 2>&1 | FileCheck %s -check-prefix=STRIDED_UNMASKED
3 ; RUN: opt -S -passes=loop-vectorize -force-vector-width=8 -force-vector-interleave=1 -enable-interleaved-mem-accesses -enable-masked-interleaved-mem-accesses -debug-only=loop-vectorize,vectorutils -disable-output < %s 2>&1 | FileCheck %s -check-prefix=STRIDED_MASKED
5 target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
7 ; We test here that the loop-vectorizer forms an interleave-groups from
8 ; predicated memory accesses only if they are both in the same (predicated)
9 ; block (first scenario below).
10 ; If the accesses are not in the same predicated block, an interleave-group
11 ; is not formed (scenarios 2,3 below).
13 ; Scenario 1: Check the case where it is legal to create masked interleave-
14 ; groups. Altogether two groups are created (one for loads and one for stores)
15 ; when masked-interleaved-acceses are enabled. When masked-interleaved-acceses
16 ; are disabled we do not create any interleave-group.
18 ; void masked_strided1(const unsigned char* restrict p,
19 ; unsigned char* restrict q,
20 ; unsigned char guard) {
21 ; for(ix=0; ix < 1024; ++ix) {
23 ; char left = p[2*ix];
24 ; char right = p[2*ix + 1];
25 ; char max = max(left, right);
27 ; q[2*ix+1] = 0 - max;
33 ; STRIDED_UNMASKED: LV: Checking a loop in 'masked_strided1'
34 ; STRIDED_UNMASKED: LV: Analyzing interleaved accesses...
35 ; STRIDED_UNMASKED-NOT: LV: Creating an interleave group
37 ; STRIDED_MASKED: LV: Checking a loop in 'masked_strided1'
38 ; STRIDED_MASKED: LV: Analyzing interleaved accesses...
39 ; STRIDED_MASKED-NEXT: LV: Creating an interleave group with: store i8 %{{.*}}, ptr %{{.*}}, align 1
40 ; STRIDED_MASKED-NEXT: LV: Inserted: store i8 %{{.*}}, ptr %{{.*}}, align 1
41 ; STRIDED_MASKED-NEXT: into the interleave group with store i8 %{{.*}}, ptr %{{.*}}, align 1
42 ; STRIDED_MASKED-NEXT: LV: Creating an interleave group with: %{{.*}} = load i8, ptr %{{.*}}, align 1
43 ; STRIDED_MASKED-NEXT: LV: Inserted: %{{.*}} = load i8, ptr %{{.*}}, align 1
44 ; STRIDED_MASKED-NEXT: into the interleave group with %{{.*}} = load i8, ptr %{{.*}}, align 1
46 ; Scenario 2: Check the case where it is illegal to create a masked interleave-
47 ; group because the first access is predicated, and the second isn't.
48 ; We therefore create a separate interleave-group with gaps for each of the
49 ; stores (if masked-interleaved-accesses are enabled).
50 ; If masked-interleaved-accesses is not enabled we create only one interleave
51 ; group of stores (for the non-predicated store) and it is later invalidated
54 ; void masked_strided2(const unsigned char* restrict p,
55 ; unsigned char* restrict q,
56 ; unsigned char guard1,
57 ; unsigned char guard2) {
58 ; for(ix=0; ix < 1024; ++ix) {
66 ; STRIDED_UNMASKED: LV: Checking a loop in 'masked_strided2'
67 ; STRIDED_UNMASKED: LV: Analyzing interleaved accesses...
68 ; STRIDED_UNMASKED-NEXT: LV: Creating an interleave group with: store i8 1, ptr %{{.*}}, align 1
69 ; STRIDED_UNMASKED-NEXT: LV: Invalidate candidate interleaved store group due to gaps.
70 ; STRIDED_UNMASKED-NOT: LV: Creating an interleave group
72 ; STRIDED_MASKED: LV: Checking a loop in 'masked_strided2'
73 ; STRIDED_MASKED: LV: Analyzing interleaved accesses...
74 ; STRIDED_MASKED-NEXT: LV: Creating an interleave group with: store i8 2, ptr %{{.*}}, align 1
75 ; STRIDED_MASKED-NEXT: LV: Creating an interleave group with: store i8 1, ptr %{{.*}}, align 1
76 ; STRIDED_MASKED-NOT: LV: Invalidate candidate interleaved store group due to gaps.
79 ; Scenario 3: Check the case where it is illegal to create a masked interleave-
80 ; group because the two accesses are in separate predicated blocks.
81 ; We therefore create a separate interleave-group with gaps for each of the accesses,
82 ; If masked-interleaved-accesses is not enabled we don't create any interleave
83 ; group because all accesses are predicated.
85 ; void masked_strided3(const unsigned char* restrict p,
86 ; unsigned char* restrict q,
87 ; unsigned char guard1,
88 ; unsigned char guard2) {
89 ; for(ix=0; ix < 1024; ++ix) {
100 ; STRIDED_UNMASKED: LV: Checking a loop in 'masked_strided3'
101 ; STRIDED_UNMASKED: LV: Analyzing interleaved accesses...
102 ; STRIDED_UNMASKED-NOT: LV: Creating an interleave group
104 ; STRIDED_MASKED: LV: Checking a loop in 'masked_strided3'
105 ; STRIDED_MASKED: LV: Analyzing interleaved accesses...
106 ; STRIDED_MASKED-NEXT: LV: Creating an interleave group with: store i8 2, ptr %{{.*}}, align 1
107 ; STRIDED_MASKED-NEXT: LV: Creating an interleave group with: store i8 1, ptr %{{.*}}, align 1
108 ; STRIDED_MASKED-NOT: LV: Invalidate candidate interleaved store group due to gaps.
111 ; ModuleID = 'test.c'
112 source_filename = "test.c"
113 target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
114 target triple = "i386-unknown-linux-gnu"
116 define dso_local void @masked_strided1(ptr noalias nocapture readonly %p, ptr noalias nocapture %q, i8 zeroext %guard) local_unnamed_addr #0 {
118 %conv = zext i8 %guard to i32
122 %ix.024 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
123 %cmp1 = icmp ugt i32 %ix.024, %conv
124 br i1 %cmp1, label %if.then, label %for.inc
127 %mul = shl nuw nsw i32 %ix.024, 1
128 %arrayidx = getelementptr inbounds i8, ptr %p, i32 %mul
129 %0 = load i8, ptr %arrayidx, align 1
130 %add = or disjoint i32 %mul, 1
131 %arrayidx4 = getelementptr inbounds i8, ptr %p, i32 %add
132 %1 = load i8, ptr %arrayidx4, align 1
133 %cmp.i = icmp slt i8 %0, %1
134 %spec.select.i = select i1 %cmp.i, i8 %1, i8 %0
135 %arrayidx6 = getelementptr inbounds i8, ptr %q, i32 %mul
136 store i8 %spec.select.i, ptr %arrayidx6, align 1
137 %sub = sub i8 0, %spec.select.i
138 %arrayidx11 = getelementptr inbounds i8, ptr %q, i32 %add
139 store i8 %sub, ptr %arrayidx11, align 1
143 %inc = add nuw nsw i32 %ix.024, 1
144 %exitcond = icmp eq i32 %inc, 1024
145 br i1 %exitcond, label %for.end, label %for.body
152 define dso_local void @masked_strided2(ptr noalias nocapture readnone %p, ptr noalias nocapture %q, i8 zeroext %guard) local_unnamed_addr #0 {
154 %conv = zext i8 %guard to i32
158 %ix.012 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
159 %mul = shl nuw nsw i32 %ix.012, 1
160 %arrayidx = getelementptr inbounds i8, ptr %q, i32 %mul
161 store i8 1, ptr %arrayidx, align 1
162 %cmp1 = icmp ugt i32 %ix.012, %conv
163 br i1 %cmp1, label %if.then, label %for.inc
166 %add = or disjoint i32 %mul, 1
167 %arrayidx3 = getelementptr inbounds i8, ptr %q, i32 %add
168 store i8 2, ptr %arrayidx3, align 1
172 %inc = add nuw nsw i32 %ix.012, 1
173 %exitcond = icmp eq i32 %inc, 1024
174 br i1 %exitcond, label %for.end, label %for.body
181 define dso_local void @masked_strided3(ptr noalias nocapture readnone %p, ptr noalias nocapture %q, i8 zeroext %guard1, i8 zeroext %guard2) local_unnamed_addr #0 {
183 %conv = zext i8 %guard1 to i32
184 %conv3 = zext i8 %guard2 to i32
188 %ix.018 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
189 %mul = shl nuw nsw i32 %ix.018, 1
190 %cmp1 = icmp ugt i32 %ix.018, %conv
191 br i1 %cmp1, label %if.then, label %if.end
194 %arrayidx = getelementptr inbounds i8, ptr %q, i32 %mul
195 store i8 1, ptr %arrayidx, align 1
199 %cmp4 = icmp ugt i32 %ix.018, %conv3
200 br i1 %cmp4, label %if.then6, label %for.inc
203 %add = or disjoint i32 %mul, 1
204 %arrayidx7 = getelementptr inbounds i8, ptr %q, i32 %add
205 store i8 2, ptr %arrayidx7, align 1
209 %inc = add nuw nsw i32 %ix.018, 1
210 %exitcond = icmp eq i32 %inc, 1024
211 br i1 %exitcond, label %for.end, label %for.body
217 attributes #0 = { "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" }