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1; RUN: opt -O2 -mtriple=bpf-pc-linux -S -o - %s | FileCheck %s2;3; Check handling of a store instruction for a field with non-standard4; alignment by bpf-preserve-static-offset.5;6; Source:7; #define __ctx __attribute__((preserve_static_offset))8; 9; typedef int aligned_int __attribute__((aligned(128)));10; 11; struct foo {12; int _;13; aligned_int a;14; } __ctx;15; 16; void bar(struct foo *p) { 17; p->a = 7; 18; }19;20; Compilation flag:21; clang -cc1 -O2 -triple bpf -S -emit-llvm -disable-llvm-passes -o - \22; | opt -passes=function(sroa) -S -o -23 24%struct.foo = type { i32, [124 x i8], i32, [124 x i8] }25 26; Function Attrs: nounwind27define dso_local void @bar(ptr noundef %p) #0 {28entry:29 %0 = call ptr @llvm.preserve.static.offset(ptr %p)30 %a = getelementptr inbounds %struct.foo, ptr %0, i32 0, i32 231 store i32 7, ptr %a, align 128, !tbaa !232 ret void33}34 35; CHECK: define dso_local void @bar(ptr noundef writeonly captures(none) %[[p:.*]])36; CHECK: tail call void (i32, ptr, i1, i8, i8, i8, i1, ...)37; CHECK-SAME: @llvm.bpf.getelementptr.and.store.i3238; CHECK-SAME: (i32 7,39; CHECK-SAME: ptr writeonly elementtype(%struct.foo) %[[p]],40; CHECK-SAME: i1 false, i8 0, i8 1, i8 7, i1 true, i32 immarg 0, i32 immarg 2)41; CHECK-SAME: #[[v2:.*]], !tbaa42; CHECK: attributes #[[v2]] = { memory(argmem: write) }43 44; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)45declare ptr @llvm.preserve.static.offset(ptr readnone) #146 47attributes #0 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" }48attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }49 50!llvm.module.flags = !{!0}51!llvm.ident = !{!1}52 53!0 = !{i32 1, !"wchar_size", i32 4}54!1 = !{!"clang"}55!2 = !{!3, !4, i64 128}56!3 = !{!"foo", !4, i64 0, !4, i64 128}57!4 = !{!"int", !5, i64 0}58!5 = !{!"omnipotent char", !6, i64 0}59!6 = !{!"Simple C/C++ TBAA"}60