79 lines
3.0 KiB
LLVM
79 lines
3.0 KiB
LLVM
; RUN: llc -march=bpfel < %s | FileCheck %s
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; RUN: llc -march=bpfel -mcpu=v3 < %s | FileCheck %s
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;
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; Source code:
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; /* set aligned 4 to minimize the number of loads */
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; struct build_id {
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; unsigned char id[20];
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; } __attribute__((aligned(4)));
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;
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; /* try to compute a local build_id */
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; void bar1(void *);
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;
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; /* the global build_id to compare */
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; struct build_id id2;
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;
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; int foo()
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; {
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; struct build_id id1;
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;
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; bar1(&id1);
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; return __builtin_memcmp(&id1, &id2, sizeof(id1)) == 0;
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; }
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; Compilation flags:
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; clang -target bpf -S -O2 t.c -emit-llvm
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%struct.build_id = type { [20 x i8] }
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@id2 = dso_local global %struct.build_id zeroinitializer, align 4
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; Function Attrs: nounwind
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define dso_local i32 @foo() local_unnamed_addr #0 {
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entry:
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%id11 = alloca [20 x i8], align 4
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%id11.sub = getelementptr inbounds [20 x i8], [20 x i8]* %id11, i64 0, i64 0
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call void @llvm.lifetime.start.p0i8(i64 20, i8* nonnull %id11.sub) #4
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call void @bar1(i8* noundef nonnull %id11.sub) #4
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%call = call i32 @memcmp(i8* noundef nonnull dereferenceable(20) %id11.sub, i8* noundef nonnull dereferenceable(20) getelementptr inbounds (%struct.build_id, %struct.build_id* @id2, i64 0, i32 0, i64 0), i64 noundef 20) #4
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%cmp = icmp eq i32 %call, 0
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%conv = zext i1 %cmp to i32
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call void @llvm.lifetime.end.p0i8(i64 20, i8* nonnull %id11.sub) #4
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ret i32 %conv
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}
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; CHECK-DAG: *(u32 *)(r1 + 0)
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; CHECK-DAG: *(u32 *)(r1 + 4)
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; CHECK-DAG: *(u32 *)(r10 - 16)
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; CHECK-DAG: *(u32 *)(r10 - 20)
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; CHECK-DAG: *(u32 *)(r10 - 8)
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; CHECK-DAG: *(u32 *)(r10 - 12)
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; CHECK-DAG: *(u32 *)(r1 + 8)
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; CHECK-DAG: *(u32 *)(r1 + 12)
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; CHECK-DAG: *(u32 *)(r2 + 16)
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; CHECK-DAG: *(u32 *)(r10 - 4)
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; Function Attrs: argmemonly mustprogress nofree nosync nounwind willreturn
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declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
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declare dso_local void @bar1(i8* noundef) local_unnamed_addr #2
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; Function Attrs: argmemonly mustprogress nofree nounwind readonly willreturn
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declare dso_local i32 @memcmp(i8* nocapture noundef, i8* nocapture noundef, i64 noundef) local_unnamed_addr #3
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; Function Attrs: argmemonly mustprogress nofree nosync nounwind willreturn
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declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
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attributes #0 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
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attributes #1 = { argmemonly mustprogress nofree nosync nounwind willreturn }
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attributes #2 = { "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
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attributes #3 = { argmemonly mustprogress nofree nounwind readonly willreturn "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
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attributes #4 = { nounwind }
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!llvm.module.flags = !{!0, !1}
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!llvm.ident = !{!2}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{i32 7, !"frame-pointer", i32 2}
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!2 = !{!"clang version 15.0.0 (https://github.com/llvm/llvm-project.git dea65874b2505f8f5e8e51fd8cad6908feb375ec)"}
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