1; RUN: opt --bpf-check-and-opt-ir -mtriple=bpf-pc-linux -S -o - %s | FileCheck %s 2; 3; Check unroll of getelementptr.and.load. 4; 5; Source: 6; #define __ctx __attribute__((preserve_static_offset)) 7; 8; struct foo { 9; int a; 10; int b; 11; } __ctx; 12; 13; extern void consume(int); 14; 15; void bar(struct foo *p){ 16; consume(p->b); 17; } 18; 19; Compilation flag: 20; clang -cc1 -O2 -triple bpf -S -emit-llvm -disable-llvm-passes -o - \ 21; | opt -passes=sroa,bpf-preserve-static-offset -S -o - 22 23%struct.foo = type { i32, i32 } 24 25; Function Attrs: nounwind 26define dso_local void @bar(ptr noundef %p) #0 { 27entry: 28 %b1 = call i32 (ptr, i1, i8, i8, i8, i1, ...) 29 @llvm.bpf.getelementptr.and.load.i32 30 (ptr readonly elementtype(%struct.foo) %p, 31 i1 false, i8 0, i8 1, i8 2, i1 true, i32 immarg 0, i32 immarg 1) 32 #4, !tbaa !2 33 call void @consume(i32 noundef %b1) 34 ret void 35} 36 37; CHECK: define dso_local void @bar(ptr noundef %[[p:.*]]) #[[v1:.*]] { 38; CHECK: %[[b11:.*]] = getelementptr inbounds %struct.foo, ptr %[[p]], i32 0, i32 1 39; CHECK-NEXT: %[[v2:.*]] = load i32, ptr %[[b11]], align 4 40; CHECK-NEXT: call void @consume(i32 noundef %[[v2]]) 41 42declare void @consume(i32 noundef) #1 43 44; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none) 45declare ptr @llvm.preserve.static.offset(ptr readnone) #2 46 47; Function Attrs: nocallback nofree nounwind willreturn 48declare i32 @llvm.bpf.getelementptr.and.load.i32(ptr nocapture, i1 immarg, i8 immarg, i8 immarg, i8 immarg, i1 immarg, ...) #3 49 50attributes #0 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 51attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 52attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) } 53attributes #3 = { nocallback nofree nounwind willreturn } 54attributes #4 = { memory(argmem: read) } 55 56!llvm.module.flags = !{!0} 57!llvm.ident = !{!1} 58 59!0 = !{i32 1, !"wchar_size", i32 4} 60!1 = !{!"clang"} 61!2 = !{!3, !4, i64 4} 62!3 = !{!"foo", !4, i64 0, !4, i64 4} 63!4 = !{!"int", !5, i64 0} 64!5 = !{!"omnipotent char", !6, i64 0} 65!6 = !{!"Simple C/C++ TBAA"} 66