derek.holloway
7502bf64a4
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50 lines
1.6 KiB
LLVM
50 lines
1.6 KiB
LLVM
; RUN: llc < %s -mtriple=bpfel -mattr=+alu32 -verify-machineinstrs | FileCheck %s
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; RUN: llc < %s -mtriple=bpfeb -mattr=+alu32 -verify-machineinstrs | FileCheck %s
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;
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; Source Code:
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; struct t {
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; unsigned char a;
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; unsigned char b;
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; unsigned char c;
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; };
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; extern void foo(ptr);
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; int test() {
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; struct t v = {
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; .b = 2,
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; };
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; foo(&v);
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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.t = type { i8, i8, i8 }
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@__const.test.v = private unnamed_addr constant %struct.t { i8 0, i8 2, i8 0 }, align 1
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; Function Attrs: nounwind
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define dso_local i32 @test() local_unnamed_addr {
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entry:
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%v1 = alloca [3 x i8], align 1
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call void @llvm.lifetime.start.p0(i64 3, ptr nonnull %v1)
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call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 1 dereferenceable(3) %v1, ptr nonnull align 1 dereferenceable(3) @__const.test.v, i64 3, i1 false)
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call void @foo(ptr nonnull %v1)
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call void @llvm.lifetime.end.p0(i64 3, ptr nonnull %v1)
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ret i32 0
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}
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; CHECK-NOT: w{{[0-9]+}} = *(u16 *)
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; CHECK-NOT: w{{[0-9]+}} = *(u8 *)
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; CHECK: *(u16 *)(r10 - 4) = w{{[0-9]+}}
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; CHECK: *(u8 *)(r10 - 2) = w{{[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
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declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg)
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declare dso_local void @foo(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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