derek.holloway
7502bf64a4
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65 lines
1.7 KiB
LLVM
65 lines
1.7 KiB
LLVM
; RUN: llc < %s -mtriple=bpf -mcpu=v1 -verify-machineinstrs | FileCheck %s
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; Source code:
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; struct xdp_md {
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; unsigned data;
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; unsigned data_end;
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; };
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;
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; int gbl;
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; int xdp_dummy(struct xdp_md *xdp)
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; {
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; char addr = *(char *)(long)xdp->data;
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; if (gbl) {
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; if (gbl == 1)
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; return 1;
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; if (addr == 1)
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; return 3;
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; } else if (addr == 0)
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; return 2;
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; return 0;
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; }
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%struct.xdp_md = type { i32, i32 }
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@gbl = common local_unnamed_addr global i32 0, align 4
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; Function Attrs: norecurse nounwind readonly
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define i32 @xdp_dummy(ptr nocapture readonly %xdp) local_unnamed_addr #0 {
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entry:
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%0 = load i32, ptr %xdp, align 4
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%conv = zext i32 %0 to i64
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%1 = inttoptr i64 %conv to ptr
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%2 = load i8, ptr %1, align 1
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; CHECK: r1 = *(u32 *)(r1 + 0)
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; CHECK: r1 = *(u8 *)(r1 + 0)
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%3 = load i32, ptr @gbl, align 4
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switch i32 %3, label %if.end [
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i32 0, label %if.else
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i32 1, label %cleanup
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]
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if.end: ; preds = %entry
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%cmp4 = icmp eq i8 %2, 1
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; CHECK: r0 = 3
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; CHECK-NOT: r1 &= 255
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; CHECK: if r1 == 1 goto
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br i1 %cmp4, label %cleanup, label %if.end13
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if.else: ; preds = %entry
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%cmp9 = icmp eq i8 %2, 0
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; CHECK: r0 = 2
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; CHECK-NOT: r1 &= 255
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; CHECK: if r1 == 0 goto
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br i1 %cmp9, label %cleanup, label %if.end13
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if.end13: ; preds = %if.else, %if.end
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br label %cleanup
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cleanup: ; preds = %if.else, %if.end, %entry, %if.end13
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%retval.0 = phi i32 [ 0, %if.end13 ], [ 1, %entry ], [ 3, %if.end ], [ 2, %if.else ]
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ret i32 %retval.0
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}
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attributes #0 = { norecurse nounwind readonly }
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