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1; RUN: opt -passes=bpf-preserve-static-offset -mtriple=bpf-pc-linux -S -o - %s | FileCheck %s2;3; Check handling of a load 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; extern void consume(int);17; 18; void bar(struct foo *p) {19; consume(p->a);20; }21;22; Compilation flag:23; clang -cc1 -O2 -triple bpf -S -emit-llvm -disable-llvm-passes -o - \24; | opt -passes=function(sroa) -S -o -25 26%struct.foo = type { i32, [124 x i8], i32, [124 x i8] }27 28; Function Attrs: nounwind29define dso_local void @bar(ptr noundef %p) #0 {30entry:31 %0 = call ptr @llvm.preserve.static.offset(ptr %p)32 %a = getelementptr inbounds %struct.foo, ptr %0, i32 0, i32 233 %1 = load i32, ptr %a, align 128, !tbaa !234 call void @consume(i32 noundef %1)35 ret void36}37 38; CHECK: %[[a1:.*]] = call i32 (ptr, i1, i8, i8, i8, i1, ...)39; CHECK-SAME: @llvm.bpf.getelementptr.and.load.i3240; CHECK-SAME: (ptr readonly elementtype(%struct.foo) %{{[^,]+}},41; CHECK-SAME: i1 false, i8 0, i8 1, i8 7, i1 true, i32 immarg 0, i32 immarg 2)42; ^^^^43; alignment 2**744; CHECK-SAME: #[[v2:.*]], !tbaa45; CHECK-NEXT: call void @consume(i32 noundef %[[a1]])46; CHECK: attributes #[[v2]] = { memory(argmem: read) }47 48declare void @consume(i32 noundef) #149 50; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)51declare ptr @llvm.preserve.static.offset(ptr readnone) #252 53attributes #0 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" }54attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" }55attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }56 57!llvm.module.flags = !{!0}58!llvm.ident = !{!1}59 60!0 = !{i32 1, !"wchar_size", i32 4}61!1 = !{!"clang"}62!2 = !{!3, !4, i64 128}63!3 = !{!"foo", !4, i64 0, !4, i64 128}64!4 = !{!"int", !5, i64 0}65!5 = !{!"omnipotent char", !6, i64 0}66!6 = !{!"Simple C/C++ TBAA"}67