1 ; RUN: opt -O2 -mtriple=bpf-pc-linux -S -o - %s | FileCheck %s
3 ; Check handling of a volatile store instruction by bpf-preserve-static-offset.
6 ; #define __ctx __attribute__((preserve_static_offset))
13 ; void bar(struct foo *p) {
18 ; clang -cc1 -O2 -triple bpf -S -emit-llvm -disable-llvm-passes -o - \
19 ; | opt -passes=function(sroa) -S -o -
21 %struct.foo = type { i32, i32 }
23 ; Function Attrs: nounwind
24 define dso_local void @bar(ptr noundef %p) #0 {
26 %0 = call ptr @llvm.preserve.static.offset(ptr %p)
27 %b = getelementptr inbounds %struct.foo, ptr %0, i32 0, i32 1
28 store volatile i32 42, ptr %b, align 4, !tbaa !2
32 ; CHECK: define dso_local void @bar(ptr nocapture noundef %[[p:.*]])
33 ; CHECK: tail call void (i32, ptr, i1, i8, i8, i8, i1, ...)
34 ; CHECK-SAME: @llvm.bpf.getelementptr.and.store.i32
35 ; CHECK-SAME: (i32 42,
36 ; CHECK-SAME: ptr elementtype(%struct.foo) %[[p]],
37 ; CHECK-SAME: i1 true, i8 0, i8 1, i8 2, i1 true, i32 immarg 0, i32 immarg 1),
38 ; CHECK-NOT: #{{[0-9]+}}
41 ; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
42 declare ptr @llvm.preserve.static.offset(ptr readnone) #1
44 attributes #0 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
45 attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
47 !llvm.module.flags = !{!0}
50 !0 = !{i32 1, !"wchar_size", i32 4}
53 !3 = !{!"foo", !4, i64 0, !4, i64 4}
54 !4 = !{!"int", !5, i64 0}
55 !5 = !{!"omnipotent char", !6, i64 0}
56 !6 = !{!"Simple C/C++ TBAA"}