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1; RUN: opt -O2 -mtriple=bpf-pc-linux -S -o - %s | FileCheck %s2;3; Check handling of atomic store instruction by bpf-preserve-static-offset.4;5; Source:6; #define __ctx __attribute__((preserve_static_offset))7; 8; struct foo {9; int _;10; int a;11; } __ctx;12; 13; void bar(struct foo *p) { 14; int r; 15; r = 7;16; __atomic_store(&p->a, &r, 3);17; }18;19; Compilation flag:20; clang -cc1 -O2 -triple bpf -S -emit-llvm -disable-llvm-passes -o - \21; | opt -passes=function(sroa) -S -o -22 23%struct.foo = type { i32, i32 }24 25; Function Attrs: nounwind26define dso_local void @bar(ptr noundef %p) #0 {27entry:28 %0 = call ptr @llvm.preserve.static.offset(ptr %p)29 %a = getelementptr inbounds %struct.foo, ptr %0, i32 0, i32 130 store atomic i32 7, ptr %a release, align 431 ret void32}33 34; CHECK: define dso_local void @bar(ptr noundef captures(none) %[[p:.*]])35; CHECK: tail call void (i32, ptr, i1, i8, i8, i8, i1, ...)36; CHECK-SAME: @llvm.bpf.getelementptr.and.store.i3237; CHECK-SAME: (i32 7,38; CHECK-SAME: ptr elementtype(%struct.foo) %[[p]],39; CHECK-SAME: i1 false, i8 5, i8 1, i8 2, i1 true, i32 immarg 0, i32 immarg 1)40; CHECK-NOT: #{{[0-9]+}}41; CHECK-NEXT: ret void42 43; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)44declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #145 46; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)47declare ptr @llvm.preserve.static.offset(ptr readnone) #248 49; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)50declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #151 52attributes #0 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" }53attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }54attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }55 56!llvm.module.flags = !{!0}57!llvm.ident = !{!1}58 59!0 = !{i32 1, !"wchar_size", i32 4}60!1 = !{!"clang"}61