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