1; RUN: opt --bpf-check-and-opt-ir -mtriple=bpf-pc-linux -S -o - %s | FileCheck %s 2; 3; Check unroll of getelementptr.and.store when several field indexes 4; are specified in a chain. 5; 6; Source: 7; #define __ctx __attribute__((preserve_static_offset)) 8; 9; struct bar { 10; int aa; 11; int bb; 12; }; 13; 14; struct foo { 15; int a; 16; struct bar b; 17; } __ctx; 18; 19; void buz(struct foo *p) { 20; p->b.bb = 42; 21; } 22; 23; Compilation flag: 24; clang -cc1 -O2 -triple bpf -S -emit-llvm -disable-llvm-passes -o - \ 25; | opt -passes=sroa,bpf-preserve-static-offset -S -o - 26 27%struct.foo = type { i32, %struct.bar } 28%struct.bar = type { i32, i32 } 29 30; Function Attrs: nounwind 31define dso_local void @buz(ptr noundef %p) #0 { 32entry: 33 call void (i32, ptr, i1, i8, i8, i8, i1, ...) 34 @llvm.bpf.getelementptr.and.store.i32 35 (i32 42, 36 ptr writeonly elementtype(%struct.foo) %p, 37 i1 false, i8 0, i8 1, i8 2, i1 true, i32 immarg 0, i32 immarg 1, i32 immarg 1) 38 #3, !tbaa !2 39 ret void 40} 41 42; CHECK: define dso_local void @buz(ptr noundef %[[p:.*]]) 43; CHECK: %[[v2:.*]] = getelementptr inbounds %struct.foo, ptr %[[p]], i32 0, i32 1, i32 1 44; CHECK: store i32 42, ptr %[[v2]], align 4 45; CHECK: ret void 46 47; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none) 48declare ptr @llvm.preserve.static.offset(ptr readnone) #1 49 50; Function Attrs: nocallback nofree nounwind willreturn 51declare void @llvm.bpf.getelementptr.and.store.i32(i32, ptr nocapture, i1 immarg, i8 immarg, i8 immarg, i8 immarg, i1 immarg, ...) #2 52 53attributes #0 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 54attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) } 55attributes #2 = { nocallback nofree nounwind willreturn } 56attributes #3 = { memory(argmem: write) } 57 58!llvm.module.flags = !{!0} 59!llvm.ident = !{!1} 60 61!0 = !{i32 1, !"wchar_size", i32 4} 62!1 = !{!"clang"} 63!2 = !{!3, !4, i64 8} 64!3 = !{!"foo", !4, i64 0, !7, i64 4} 65!4 = !{!"int", !5, i64 0} 66!5 = !{!"omnipotent char", !6, i64 0} 67!6 = !{!"Simple C/C++ TBAA"} 68!7 = !{!"bar", !4, i64 0, !4, i64 4} 69