1 ; RUN: opt -O2 -mtriple=bpf-pc-linux -S -o - %s | FileCheck %s
3 ; Check handling of a simple store instruction by bpf-preserve-static-offset.
5 ; - presence of gep.and.store intrinsic call
6 ; - correct attributes for intrinsic call
7 ; - presence of tbaa annotations
10 ; #define __ctx __attribute__((preserve_static_offset))
17 ; void bar(struct foo *p) {
22 ; clang -cc1 -O2 -triple bpf -S -emit-llvm -disable-llvm-passes -o - \
23 ; | opt -passes=function(sroa) -S -o -
25 %struct.foo = type { i32, i32 }
27 ; Function Attrs: nounwind
28 define dso_local void @bar(ptr noundef %p) #0 {
30 %0 = call ptr @llvm.preserve.static.offset(ptr %p)
31 %a = getelementptr inbounds %struct.foo, ptr %0, i32 0, i32 1
32 store i32 7, ptr %a, align 4, !tbaa !2
36 ; CHECK: define dso_local void @bar(ptr nocapture noundef writeonly %[[p:.*]])
37 ; CHECK: tail call void (i32, ptr, i1, i8, i8, i8, i1, ...)
38 ; CHECK-SAME: @llvm.bpf.getelementptr.and.store.i32
40 ; CHECK-SAME: ptr writeonly elementtype(%struct.foo) %[[p]],
41 ; CHECK-SAME: i1 false, i8 0, i8 1, i8 2, i1 true, i32 immarg 0, i32 immarg 1)
42 ; CHECK-SAME: #[[v2:.*]], !tbaa
43 ; CHECK: attributes #[[v2]] = { memory(argmem: write) }
45 ; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
46 declare ptr @llvm.preserve.static.offset(ptr readnone) #1
48 attributes #0 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
49 attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
51 !llvm.module.flags = !{!0}
54 !0 = !{i32 1, !"wchar_size", i32 4}
57 !3 = !{!"foo", !4, i64 0, !4, i64 4}
58 !4 = !{!"int", !5, i64 0}
59 !5 = !{!"omnipotent char", !6, i64 0}
60 !6 = !{!"Simple C/C++ TBAA"}