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719b0399a8
since bpf instruction set was introduced people learned to read and understand kernel verifier output whereas llvm asm output stayed obscure and unknown. Convert llvm to emit assembler text similar to kernel to avoid this discrepancy Signed-off-by: Alexei Starovoitov <ast@kernel.org> llvm-svn: 287300
47 lines
2.1 KiB
LLVM
47 lines
2.1 KiB
LLVM
; RUN: llc < %s -march=bpfel | FileCheck %s
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%struct.bpf_context = type { i64, i64, i64, i64, i64, i64, i64 }
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%struct.sk_buff = type { i64, i64, i64, i64, i64, i64, i64 }
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%struct.net_device = type { i64, i64, i64, i64, i64, i64, i64 }
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@bpf_prog1.devname = private unnamed_addr constant [3 x i8] c"lo\00", align 1
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@bpf_prog1.fmt = private unnamed_addr constant [15 x i8] c"skb %x dev %x\0A\00", align 1
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; Function Attrs: nounwind uwtable
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define i32 @bpf_prog1(%struct.bpf_context* nocapture %ctx) #0 section "events/net/netif_receive_skb" {
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%devname = alloca [3 x i8], align 1
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%fmt = alloca [15 x i8], align 1
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%1 = getelementptr inbounds [3 x i8], [3 x i8]* %devname, i64 0, i64 0
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %1, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @bpf_prog1.devname, i64 0, i64 0), i64 3, i32 1, i1 false)
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%2 = getelementptr inbounds %struct.bpf_context, %struct.bpf_context* %ctx, i64 0, i32 0
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%3 = load i64, i64* %2, align 8
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%4 = inttoptr i64 %3 to %struct.sk_buff*
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%5 = getelementptr inbounds %struct.sk_buff, %struct.sk_buff* %4, i64 0, i32 2
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%6 = bitcast i64* %5 to i8*
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%7 = call i8* inttoptr (i64 4 to i8* (i8*)*)(i8* %6) #1
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%8 = call i32 inttoptr (i64 9 to i32 (i8*, i8*, i32)*)(i8* %7, i8* %1, i32 2) #1
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%9 = icmp eq i32 %8, 0
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br i1 %9, label %10, label %13
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; <label>:10 ; preds = %0
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%11 = getelementptr inbounds [15 x i8], [15 x i8]* %fmt, i64 0, i64 0
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %11, i8* getelementptr inbounds ([15 x i8], [15 x i8]* @bpf_prog1.fmt, i64 0, i64 0), i64 15, i32 1, i1 false)
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%12 = call i32 (i8*, i32, ...) inttoptr (i64 11 to i32 (i8*, i32, ...)*)(i8* %11, i32 15, %struct.sk_buff* %4, i8* %7) #1
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; CHECK-LABEL: bpf_prog1:
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; CHECK: call 4
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; CHECK: call 9
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; CHECK: if r0 != 0
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; CHECK: r1 = 622884453
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; CHECK: r1 = 7214898703899978611ll
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; CHECK: call 11
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; CHECK: r0 = 0
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; CHECK: exit
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br label %13
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; <label>:13 ; preds = %10, %0
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ret i32 0
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}
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; Function Attrs: nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) #1
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