1; RUN: opt -O2 -mtriple=bpf-pc-linux -S -o - %s | FileCheck %s 2; 3; Check handling of a store instruction for a field with non-standard 4; 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: nounwind 27define 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 2 31 store i32 7, ptr %a, align 128, !tbaa !2 32 ret void 33} 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.i32 38; 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:.*]], !tbaa 42; 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) #1 46 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