55 lines
1.9 KiB
LLVM
55 lines
1.9 KiB
LLVM
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; RUN: llc < %s -march=bpfel -verify-machineinstrs | FileCheck %s
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; RUN: llc < %s -march=bpfeb -verify-machineinstrs | FileCheck %s
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; Source code:
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; int g[2];
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;
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; int test(void *ctx) {
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; int a = 4, b;
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; unsigned long long c = 333333333333ULL;
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; asm volatile("r0 = *(u16 *)skb[%0]" : : "i"(2));
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; asm volatile("r0 = *(u16 *)skb[%0]" : : "r"(a));
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; asm volatile("%0 = %1" : "=r"(b) : "i"(4));
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; asm volatile("%0 = %1 ll" : "=r"(b) : "i"(c));
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; asm volatile("%0 = *(u16 *) %1" : "=r"(b) : "m"(a));
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; asm volatile("%0 = *(u32 *) %1" : "=r"(b) : "m"(g[1]));
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; return b;
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; }
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;
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@g = common global [2 x i32] zeroinitializer, align 4
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; Function Attrs: nounwind
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define i32 @test(i8* nocapture readnone %ctx) local_unnamed_addr #0 {
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entry:
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%a = alloca i32, align 4
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%0 = bitcast i32* %a to i8*
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call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0) #2
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store i32 4, i32* %a, align 4
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tail call void asm sideeffect "r0 = *(u16 *)skb[$0]", "i"(i32 2) #2
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; CHECK: r0 = *(u16 *)skb[2]
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tail call void asm sideeffect "r0 = *(u16 *)skb[$0]", "r"(i32 4) #2
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; CHECK: r0 = *(u16 *)skb[r1]
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%1 = tail call i32 asm sideeffect "$0 = $1", "=r,i"(i32 4) #2
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; CHECK: r1 = 4
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%2 = tail call i32 asm sideeffect "$0 = $1 ll", "=r,i"(i64 333333333333) #2
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; CHECK: r1 = 333333333333 ll
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%3 = call i32 asm sideeffect "$0 = *(u16 *) $1", "=r,*m"(i32* nonnull %a) #2
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; CHECK: r1 = *(u16 *) (r10 - 4)
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%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
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; CHECK: r1 = g ll
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; CHECK: r0 = *(u32 *) (r1 + 4)
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call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %0) #2
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ret i32 %4
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}
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
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attributes #0 = { nounwind }
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attributes #1 = { argmemonly nounwind }
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attributes #2 = { nounwind }
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