1; RUN: opt --bpf-check-and-opt-ir -mtriple=bpf-pc-linux -S -o - %s | FileCheck %s 2; 3; Check that getelementptr.and.load unroll can skip 'inbounds' flag. 4; 5; Source (IR modified by hand): 6; #define __ctx __attribute__((preserve_static_offset)) 7; 8; struct bar { 9; int aa; 10; int bb; 11; }; 12; 13; struct foo { 14; int a; 15; struct bar b; 16; } __ctx; 17; 18; extern void consume(int); 19; 20; void buz(struct foo *p) { 21; consume(p->b.bb); 22; } 23; 24; Compilation flag: 25; clang -cc1 -O2 -triple bpf -S -emit-llvm -disable-llvm-passes -o - \ 26; | opt -passes=sroa,bpf-preserve-static-offset -S -o - 27; 28; Modified to set 'inbounds' flag to false. 29 30%struct.foo = type { i32, %struct.bar } 31%struct.bar = type { i32, i32 } 32 33; Function Attrs: nounwind 34define dso_local void @buz(ptr noundef %p) #0 { 35entry: 36 %bb1 = call i32 (ptr, i1, i8, i8, i8, i1, ...) 37 @llvm.bpf.getelementptr.and.load.i32 38 (ptr readonly elementtype(%struct.foo) %p, 39 i1 false, i8 0, i8 1, i8 2, i1 false, i32 immarg 0, i32 immarg 1, i32 immarg 1) 40 #4, !tbaa !2 41 call void @consume(i32 noundef %bb1) 42 ret void 43} 44 45; CHECK: define dso_local void @buz(ptr noundef %[[p:.*]]) 46; CHECK: %[[bb11:.*]] = getelementptr %struct.foo, ptr %[[p]], i32 0, i32 1, i32 1 47; CHECK: %[[v2:.*]] = load i32, ptr %[[bb11]], align 4 48; CHECK: call void @consume(i32 noundef %[[v2]]) 49 50declare void @consume(i32 noundef) #1 51 52; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none) 53declare ptr @llvm.preserve.static.offset(ptr readnone) #2 54 55; Function Attrs: nocallback nofree nounwind willreturn 56declare i32 @llvm.bpf.getelementptr.and.load.i32(ptr nocapture, i1 immarg, i8 immarg, i8 immarg, i8 immarg, i1 immarg, ...) #3 57 58attributes #0 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 59attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 60attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) } 61attributes #3 = { nocallback nofree nounwind willreturn } 62attributes #4 = { memory(argmem: read) } 63 64!llvm.module.flags = !{!0} 65!llvm.ident = !{!1} 66 67!0 = !{i32 1, !"wchar_size", i32 4} 68!1 = !{!"clang"} 69!2 = !{!3, !4, i64 8} 70!3 = !{!"foo", !4, i64 0, !7, i64 4} 71!4 = !{!"int", !5, i64 0} 72!5 = !{!"omnipotent char", !6, i64 0} 73!6 = !{!"Simple C/C++ TBAA"} 74!7 = !{!"bar", !4, i64 0, !4, i64 4} 75