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 restores alignment spec. 4; 5; Source: 6; #define __ctx __attribute__((preserve_static_offset)) 7; 8; typedef int aligned_int __attribute__((aligned(128))); 9; 10; struct foo { 11; int _; 12; aligned_int a; 13; } __ctx; 14; 15; extern void consume(int); 16; 17; void bar(struct foo *p) { 18; consume(p->a); 19; } 20; 21; Compilation flag: 22; clang -cc1 -O2 -triple bpf -S -emit-llvm -disable-llvm-passes -o - \ 23; | opt -passes=sroa,bpf-preserve-static-offset -S -o - 24 25%struct.foo = type { i32, [124 x i8], i32, [124 x i8] } 26 27; Function Attrs: nounwind 28define dso_local void @bar(ptr noundef %p) #0 { 29entry: 30 %a1 = call i32 (ptr, i1, i8, i8, i8, i1, ...) 31 @llvm.bpf.getelementptr.and.load.i32 32 (ptr readonly elementtype(%struct.foo) %p, 33 i1 false, i8 0, i8 1, i8 7, i1 true, i32 immarg 0, i32 immarg 2) 34 #4, !tbaa !2 35 call void @consume(i32 noundef %a1) 36 ret void 37} 38 39; CHECK: define dso_local void @bar(ptr noundef %[[p:.*]]) 40; CHECK: %[[a11:.*]] = getelementptr inbounds %struct.foo, ptr %[[p]], i32 0, i32 2 41; CHECK: %[[v2:.*]] = load i32, ptr %[[a11]], align 128 42; CHECK: call void @consume(i32 noundef %[[v2]]) 43 44declare void @consume(i32 noundef) #1 45 46; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none) 47declare ptr @llvm.preserve.static.offset(ptr readnone) #2 48 49; Function Attrs: nocallback nofree nounwind willreturn 50declare i32 @llvm.bpf.getelementptr.and.load.i32(ptr nocapture, i1 immarg, i8 immarg, i8 immarg, i8 immarg, i1 immarg, ...) #3 51 52attributes #0 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 53attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 54attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) } 55attributes #3 = { nocallback nofree nounwind willreturn } 56attributes #4 = { memory(argmem: read) } 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 128} 64!3 = !{!"foo", !4, i64 0, !4, i64 128} 65!4 = !{!"int", !5, i64 0} 66!5 = !{!"omnipotent char", !6, i64 0} 67!6 = !{!"Simple C/C++ TBAA"} 68