derek.holloway
7502bf64a4
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60 lines
1.9 KiB
LLVM
60 lines
1.9 KiB
LLVM
; RUN: llc -mtriple=bpfel -mcpu=v1 -o - %s | FileCheck %s
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; RUN: llc -mtriple=bpfeb -mcpu=v1 -o - %s | FileCheck %s
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; Source code:
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; struct ipv6_key_t {
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; unsigned pid;
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; unsigned __int128 saddr;
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; unsigned short lport;
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; };
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;
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; extern void test1(ptr);
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; int test(int pid) {
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; struct ipv6_key_t ipv6_key = {.pid = pid};
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; test1(&ipv6_key);
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; return 0;
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; }
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; Compilation flag:
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; clang -target bpf -O2 -S -emit-llvm t.c
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%struct.ipv6_key_t = type { i32, i128, i16 }
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; Function Attrs: nounwind
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define dso_local i32 @test(i32 %pid) local_unnamed_addr {
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entry:
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%ipv6_key = alloca %struct.ipv6_key_t, align 16
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call void @llvm.lifetime.start.p0(i64 48, ptr nonnull %ipv6_key)
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call void @llvm.memset.p0.i64(ptr nonnull align 16 dereferenceable(48) %ipv6_key, i8 0, i64 48, i1 false)
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store i32 %pid, ptr %ipv6_key, align 16, !tbaa !2
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call void @test1(ptr nonnull %ipv6_key)
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call void @llvm.lifetime.end.p0(i64 48, ptr nonnull %ipv6_key)
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ret i32 0
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}
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; CHECK-LABEL: test
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; CHECK: *(u64 *)(r10 - 48) = r{{[0-9]+}}
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; CHECK: *(u32 *)(r10 - 48) = r{{[0-9]+}}
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; Function Attrs: argmemonly nounwind willreturn
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declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture)
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; Function Attrs: argmemonly nounwind willreturn writeonly
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declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg)
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declare dso_local void @test1(ptr) local_unnamed_addr
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; Function Attrs: argmemonly nounwind willreturn
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declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture)
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!llvm.module.flags = !{!0}
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!llvm.ident = !{!1}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{!"clang version 11.0.0 (https://github.com/llvm/llvm-project.git 55fc7a47f8f18f84b44ff16f4e7a420c0a42ddf1)"}
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!2 = !{!3, !4, i64 0}
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!3 = !{!"ipv6_key_t", !4, i64 0, !7, i64 16, !8, i64 32}
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!4 = !{!"int", !5, i64 0}
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!5 = !{!"omnipotent char", !6, i64 0}
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!6 = !{!"Simple C/C++ TBAA"}
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!7 = !{!"__int128", !5, i64 0}
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!8 = !{!"short", !5, i64 0}
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