2 ; RUN: llc < %s -mtriple=arm64-linux-gnu -mcpu=cortex-a53 -pre-RA-sched=source -enable-misched -verify-misched -debug-only=machine-scheduler -disable-machine-dce -o - 2>&1 > /dev/null | FileCheck %s
3 ; RUN: llc < %s -mtriple=arm64-linux-gnu -mcpu=cortex-a53 -pre-RA-sched=source -enable-misched -verify-misched -debug-only=machine-scheduler -disable-machine-dce -o - -misched-limit=2 2>&1 > /dev/null | FileCheck %s
5 ; The Cortex-A53 machine model will cause the MADD instruction to be scheduled
6 ; much higher than the ADD instructions in order to hide latency. When not
7 ; specifying a subtarget, the MADD will remain near the end of the block.
9 ; CHECK: ********** MI Scheduling **********
11 ; CHECK: *** Final schedule for %bb.2 ***
14 ; CHECK: ********** INTERVALS **********
15 @main.x = private unnamed_addr constant [8 x i32] [i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1], align 4
16 @main.y = private unnamed_addr constant [8 x i32] [i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2], align 4
18 ; Function Attrs: nounwind
19 define i32 @main() #0 {
21 %retval = alloca i32, align 4
22 %x = alloca [8 x i32], align 4
23 %y = alloca [8 x i32], align 4
24 %i = alloca i32, align 4
25 %xx = alloca i32, align 4
26 %yy = alloca i32, align 4
27 store i32 0, ptr %retval
28 %0 = bitcast ptr %x to ptr
29 call void @llvm.memcpy.p0.p0.i64(ptr align 4 %0, ptr align 4 @main.x, i64 32, i1 false)
30 %1 = bitcast ptr %y to ptr
31 call void @llvm.memcpy.p0.p0.i64(ptr align 4 %1, ptr align 4 @main.y, i64 32, i1 false)
32 store i32 0, ptr %xx, align 4
33 store i32 0, ptr %yy, align 4
34 store i32 0, ptr %i, align 4
37 for.cond: ; preds = %for.inc, %entry
38 %2 = load i32, ptr %i, align 4
39 %cmp = icmp slt i32 %2, 8
40 br i1 %cmp, label %for.body, label %for.end
42 for.body: ; preds = %for.cond
43 %3 = load i32, ptr %i, align 4
44 %idxprom = sext i32 %3 to i64
45 %arrayidx = getelementptr inbounds [8 x i32], ptr %x, i32 0, i64 %idxprom
46 %4 = load i32, ptr %arrayidx, align 4
47 %add = add nsw i32 %4, 1
48 store i32 %add, ptr %xx, align 4
49 %5 = load i32, ptr %xx, align 4
50 %add1 = add nsw i32 %5, 12
51 store i32 %add1, ptr %xx, align 4
52 %6 = load i32, ptr %xx, align 4
53 %add2 = add nsw i32 %6, 23
54 store i32 %add2, ptr %xx, align 4
55 %7 = load i32, ptr %xx, align 4
56 %add3 = add nsw i32 %7, 34
57 store i32 %add3, ptr %xx, align 4
58 %8 = load i32, ptr %i, align 4
59 %idxprom4 = sext i32 %8 to i64
60 %arrayidx5 = getelementptr inbounds [8 x i32], ptr %y, i32 0, i64 %idxprom4
61 %9 = load i32, ptr %arrayidx5, align 4
62 %10 = load i32, ptr %yy, align 4
63 %mul = mul nsw i32 %10, %9
64 store i32 %mul, ptr %yy, align 4
67 for.inc: ; preds = %for.body
68 %11 = load i32, ptr %i, align 4
69 %inc = add nsw i32 %11, 1
70 store i32 %inc, ptr %i, align 4
73 for.end: ; preds = %for.cond
74 %12 = load i32, ptr %xx, align 4
75 %13 = load i32, ptr %yy, align 4
76 %add6 = add nsw i32 %12, %13
81 ; The Cortex-A53 machine model will cause the FDIVvvv_42 to be raised to
82 ; hide latency. Whereas normally there would only be a single FADDvvv_4s
83 ; after it, this test checks to make sure there are more than one.
85 ; CHECK: ********** MI Scheduling **********
86 ; CHECK: neon4xfloat:%bb.0
87 ; CHECK: *** Final schedule for %bb.0 ***
91 ; CHECK: ********** INTERVALS **********
92 define <4 x float> @neon4xfloat(<4 x float> %A, <4 x float> %B) {
93 %tmp1 = fadd <4 x float> %A, %B;
94 %tmp2 = fadd <4 x float> %A, %tmp1;
95 %tmp3 = fadd <4 x float> %A, %tmp2;
96 %tmp4 = fadd <4 x float> %A, %tmp3;
97 %tmp5 = fadd <4 x float> %A, %tmp4;
98 %tmp6 = fadd <4 x float> %A, %tmp5;
99 %tmp7 = fadd <4 x float> %A, %tmp6;
100 %tmp8 = fadd <4 x float> %A, %tmp7;
101 %tmp9 = fdiv <4 x float> %A, %B;
102 %tmp10 = fadd <4 x float> %tmp8, %tmp9;
104 ret <4 x float> %tmp10
107 ; Function Attrs: nounwind
108 declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture readonly, i64, i1) #1
110 attributes #0 = { nounwind "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
111 attributes #1 = { nounwind }
114 ; Regression Test for PR19761
115 ; [ARM64] Cortex-a53 schedule mode can't handle NEON post-increment load
117 ; Nothing explicit to check other than llc not crashing.
118 define { <16 x i8>, <16 x i8> } @test_v16i8_post_imm_ld2(ptr %A, ptr %ptr) {
119 %ld2 = tail call { <16 x i8>, <16 x i8> } @llvm.aarch64.neon.ld2.v16i8.p0(ptr %A)
120 %tmp = getelementptr i8, ptr %A, i32 32
121 store ptr %tmp, ptr %ptr
122 ret { <16 x i8>, <16 x i8> } %ld2
125 declare { <16 x i8>, <16 x i8> } @llvm.aarch64.neon.ld2.v16i8.p0(ptr)
127 ; Regression Test for PR20057.
129 ; Cortex-A53 machine model stalls on A53UnitFPMDS contention. Instructions that
130 ; are otherwise ready are jammed in the pending queue.
131 ; CHECK: ********** MI Scheduling **********
132 ; CHECK: testResourceConflict
133 ; CHECK: *** Final schedule for %bb.0 ***
135 ; CHECK: ********** INTERVALS **********
136 define void @testResourceConflict(ptr %ptr) {
138 %add1 = fadd float undef, undef
139 %mul2 = fmul float undef, undef
140 %add3 = fadd float %mul2, undef
141 %mul4 = fmul float undef, %add3
142 %add5 = fadd float %mul4, undef
143 %sub6 = fsub float 0.000000e+00, undef
144 %sub7 = fsub float %add5, undef
145 %div8 = fdiv float 1.000000e+00, undef
146 %mul9 = fmul float %div8, %sub7
147 %mul14 = fmul float %sub6, %div8
148 %mul10 = fsub float -0.000000e+00, %mul14
149 %mul15 = fmul float undef, %div8
150 %mul11 = fsub float -0.000000e+00, %mul15
151 %mul12 = fmul float 0.000000e+00, %div8
152 %mul13 = fmul float %add1, %mul9
153 %mul21 = fmul float %add5, %mul11
154 %add22 = fadd float %mul13, %mul21
155 store float %add22, ptr %ptr, align 4
156 %mul28 = fmul float %add1, %mul10
157 %mul33 = fmul float %add5, %mul12
158 %add34 = fadd float %mul33, %mul28
159 store float %add34, ptr %ptr, align 4
160 %mul240 = fmul float undef, %mul9
161 %add246 = fadd float %mul240, undef
162 store float %add246, ptr %ptr, align 4
163 %mul52 = fmul float undef, %mul10
164 %mul57 = fmul float undef, %mul12
165 %add58 = fadd float %mul57, %mul52
166 store float %add58, ptr %ptr, align 4
167 %mul27 = fmul float 0.000000e+00, %mul9
168 %mul81 = fmul float undef, %mul10
169 %add82 = fadd float %mul27, %mul81
170 store float %add82, ptr %ptr, align 4
171 call void @llvm.trap()
175 declare void @llvm.trap()
177 ; Regression test for PR20057: "permanent hazard"'
178 ; Resource contention on LDST.
179 ; CHECK: ********** MI Scheduling **********
180 ; CHECK: testLdStConflict
181 ; CHECK: *** Final schedule for %bb.1 ***
184 ; CHECK: ********** INTERVALS **********
185 define void @testLdStConflict(<2 x i64> %v) {
190 %0 = call { <2 x i64>, <2 x i64>, <2 x i64>, <2 x i64> } @llvm.aarch64.neon.ld4.v2i64.p0(ptr null)
191 %ptr = bitcast ptr undef to ptr
192 store <2 x i64> %v, ptr %ptr, align 4
193 %ptr1 = bitcast ptr undef to ptr
194 store <2 x i64> %v, ptr %ptr1, align 4
195 %ptr2 = bitcast ptr undef to ptr
196 store <2 x i64> %v, ptr %ptr2, align 4
197 %ptr3 = bitcast ptr undef to ptr
198 store <2 x i64> %v, ptr %ptr3, align 4
199 %ptr4 = bitcast ptr undef to ptr
200 store <2 x i64> %v, ptr %ptr4, align 4
204 declare { <2 x i64>, <2 x i64>, <2 x i64>, <2 x i64> } @llvm.aarch64.neon.ld4.v2i64.p0(ptr)