1 ; RUN: opt -O2 -mtriple=bpf-pc-linux %s | llvm-dis > %t1
2 ; RUN: llc %t1 -o - | FileCheck -check-prefixes=CHECK-COMMON,CHECK %s
3 ; RUN: opt -O2 -mtriple=bpf-pc-linux -bpf-disable-avoid-speculation %s | llvm-dis > %t1
4 ; RUN: llc %t1 -o - | FileCheck -check-prefixes=CHECK-COMMON,CHECK-DISABLE %s
9 ; unsigned long ret = foo();
15 ; clang -target bpf -O2 -S -emit-llvm -Xclang -disable-llvm-passes test.c
17 ; Function Attrs: nounwind
18 define dso_local ptr @test(ptr %p) #0 {
20 %p.addr = alloca ptr, align 8
21 %ret = alloca i64, align 8
22 store ptr %p, ptr %p.addr, align 8, !tbaa !2
23 call void @llvm.lifetime.start.p0(i64 8, ptr %ret) #3
24 %call = call i64 @foo()
25 store i64 %call, ptr %ret, align 8, !tbaa !6
26 %0 = load i64, ptr %ret, align 8, !tbaa !6
27 %cmp = icmp ule i64 %0, 7
28 br i1 %cmp, label %if.then, label %if.end
30 if.then: ; preds = %entry
31 %1 = load i64, ptr %ret, align 8, !tbaa !6
32 %2 = load ptr, ptr %p.addr, align 8, !tbaa !2
33 %add.ptr = getelementptr i8, ptr %2, i64 %1
34 store ptr %add.ptr, ptr %p.addr, align 8, !tbaa !2
37 if.end: ; preds = %if.then, %entry
38 %3 = load ptr, ptr %p.addr, align 8, !tbaa !2
39 call void @llvm.lifetime.end.p0(i64 8, ptr %ret) #3
42 ; CHECK-COMMON: [[REG6:r[0-9]+]] = r1
43 ; CHECK-COMMON: call foo
45 ; CHECK: if r0 > 7 goto [[LABEL:.*]]
46 ; CHECK: [[REG6]] += r0
48 ; CHECK: r0 = [[REG6]]
50 ; CHECK-DISABLE: [[REG1:r[0-9]+]] = 8
51 ; CHECK-DISABLE: if [[REG1]] > r0 goto [[LABEL:.*]]
52 ; CHECK-DISABLE: r0 = 0
53 ; CHECK-DISABLE: [[LABEL]]:
54 ; CHECK-DISABLE: [[REG6]] += r0
55 ; CHECK-DISABLE: r0 = [[REG6]]
59 ; Function Attrs: argmemonly nounwind willreturn
60 declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1
62 declare dso_local i64 @foo(...) #2
64 ; Function Attrs: argmemonly nounwind willreturn
65 declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1
67 attributes #0 = { nounwind "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
68 attributes #1 = { argmemonly nounwind willreturn }
69 attributes #2 = { "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
70 attributes #3 = { nounwind }
72 !llvm.module.flags = !{!0}
75 !0 = !{i32 1, !"wchar_size", i32 4}
76 !1 = !{!"clang version 12.0.0 (https://github.com/llvm/llvm-project.git ca9c5433a6c31e372092fcd8bfd0e4fddd7e8784)"}
78 !3 = !{!"any pointer", !4, i64 0}
79 !4 = !{!"omnipotent char", !5, i64 0}
80 !5 = !{!"Simple C/C++ TBAA"}
82 !7 = !{!"long", !4, i64 0}