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| author | Yonghong Song <yhs@fb.com> | 2017-09-18 23:29:36 +0000 |
|---|---|---|
| committer | Yonghong Song <yhs@fb.com> | 2017-09-18 23:29:36 +0000 |
| commit | 9ef85f06775dea8b5f11b118421e5ce997eb7c88 (patch) | |
| tree | 2cdadafbcfcde59e72c70040c43c30d3204983e1 /llvm/test | |
| parent | bb4b4eef61d3377863a2fa7688db0d0c67fe5285 (diff) | |
| download | bcm5719-llvm-9ef85f06775dea8b5f11b118421e5ce997eb7c88.tar.gz bcm5719-llvm-9ef85f06775dea8b5f11b118421e5ce997eb7c88.zip | |
bpf: add inline-asm support
Signed-off-by: Yonghong Song <yhs@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
llvm-svn: 313593
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/CodeGen/BPF/inline_asm.ll | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/BPF/inline_asm.ll b/llvm/test/CodeGen/BPF/inline_asm.ll new file mode 100644 index 00000000000..7822ac49ed8 --- /dev/null +++ b/llvm/test/CodeGen/BPF/inline_asm.ll @@ -0,0 +1,54 @@ +; RUN: llc < %s -march=bpfel -verify-machineinstrs | FileCheck %s +; RUN: llc < %s -march=bpfeb -verify-machineinstrs | FileCheck %s + +; Source code: +; int g[2]; +; +; int test(void *ctx) { +; int a = 4, b; +; unsigned long long c = 333333333333ULL; +; asm volatile("r0 = *(u16 *)skb[%0]" : : "i"(2)); +; asm volatile("r0 = *(u16 *)skb[%0]" : : "r"(a)); +; asm volatile("%0 = %1" : "=r"(b) : "i"(4)); +; asm volatile("%0 = %1 ll" : "=r"(b) : "i"(c)); +; asm volatile("%0 = *(u16 *) %1" : "=r"(b) : "m"(a)); +; asm volatile("%0 = *(u32 *) %1" : "=r"(b) : "m"(g[1])); +; return b; +; } +; + +@g = common global [2 x i32] zeroinitializer, align 4 + +; Function Attrs: nounwind +define i32 @test(i8* nocapture readnone %ctx) local_unnamed_addr #0 { +entry: + %a = alloca i32, align 4 + %0 = bitcast i32* %a to i8* + call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0) #2 + store i32 4, i32* %a, align 4 + tail call void asm sideeffect "r0 = *(u16 *)skb[$0]", "i"(i32 2) #2 +; CHECK: r0 = *(u16 *)skb[2] + tail call void asm sideeffect "r0 = *(u16 *)skb[$0]", "r"(i32 4) #2 +; CHECK: r0 = *(u16 *)skb[r1] + %1 = tail call i32 asm sideeffect "$0 = $1", "=r,i"(i32 4) #2 +; CHECK: r1 = 4 + %2 = tail call i32 asm sideeffect "$0 = $1 ll", "=r,i"(i64 333333333333) #2 +; CHECK: r1 = 333333333333 ll + %3 = call i32 asm sideeffect "$0 = *(u16 *) $1", "=r,*m"(i32* nonnull %a) #2 +; CHECK: r1 = *(u16 *) (r10 - 4) + %4 = call i32 asm sideeffect "$0 = *(u32 *) $1", "=r,*m"(i32* getelementptr inbounds ([2 x i32], [2 x i32]* @g, i64 0, i64 1)) #2 +; CHECK: r1 = g ll +; CHECK: r0 = *(u32 *) (r1 + 4) + call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %0) #2 + ret i32 %4 +} + +; Function Attrs: argmemonly nounwind +declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1 + +; Function Attrs: argmemonly nounwind +declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1 + +attributes #0 = { nounwind } +attributes #1 = { argmemonly nounwind } +attributes #2 = { nounwind } |
