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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 tmp;
; long addr;
;
; if (gbl) {
; long addr1 = (long)xdp->data;
; tmp = *(char *)addr1;
; if (tmp == 1)
; return 3;
; } else {
; tmp = *(volatile char *)(long)xdp->data_end;
; if (tmp == 1)
; return 2;
; }
; addr = (long)xdp->data;
; tmp = *(volatile char *)addr;
; if (tmp == 0)
; return 1;
; return 0;
; }
;
; unsigned int rol32(unsigned int word, unsigned int shift)
; {
; return (word << shift) | (word >> ((-shift) & 31));
; }
%struct.xdp_md = type { i32, i32 }
@gbl = common local_unnamed_addr global i32 0, align 4
; Function Attrs: norecurse nounwind
define i32 @xdp_dummy(%struct.xdp_md* nocapture readonly) local_unnamed_addr #0 {
%2 = load i32, i32* @gbl, align 4
%3 = icmp eq i32 %2, 0
br i1 %3, label %11, label %4
; <label>:4: ; preds = %1
%5 = getelementptr inbounds %struct.xdp_md, %struct.xdp_md* %0, i64 0, i32 0
%6 = load i32, i32* %5, align 4
%7 = zext i32 %6 to i64
%8 = inttoptr i64 %7 to i8*
%9 = load i8, i8* %8, align 1
%10 = icmp eq i8 %9, 1
br i1 %10, label %28, label %23
; CHECK: r1 = *(u32 *)(r1 + 0)
; CHECK: r2 = *(u8 *)(r1 + 0)
; <label>:11: ; preds = %1
%12 = getelementptr inbounds %struct.xdp_md, %struct.xdp_md* %0, i64 0, i32 1
%13 = load i32, i32* %12, align 4
%14 = zext i32 %13 to i64
; CHECK: r2 = *(u32 *)(r1 + 4)
%15 = inttoptr i64 %14 to i8*
%16 = load volatile i8, i8* %15, align 1
; CHECK: r2 = *(u8 *)(r2 + 0)
%17 = icmp eq i8 %16, 1
br i1 %17, label %28, label %18
; <label>:18: ; preds = %11
%19 = getelementptr inbounds %struct.xdp_md, %struct.xdp_md* %0, i64 0, i32 0
%20 = load i32, i32* %19, align 4
%21 = zext i32 %20 to i64
%22 = inttoptr i64 %21 to i8*
br label %23
; CHECK: r1 = *(u32 *)(r1 + 0)
; <label>:23: ; preds = %18, %4
%24 = phi i8* [ %22, %18 ], [ %8, %4 ]
; CHECK-NOT: r1 <<= 32
; CHECK-NOT: r1 >>= 32
%25 = load volatile i8, i8* %24, align 1
; CHECK: r1 = *(u8 *)(r1 + 0)
%26 = icmp eq i8 %25, 0
%27 = zext i1 %26 to i32
br label %28
; <label>:28: ; preds = %4, %23, %11
%29 = phi i32 [ 3, %4 ], [ 2, %11 ], [ %27, %23 ]
ret i32 %29
}
; Function Attrs: norecurse nounwind readnone
define i32 @rol32(i32, i32) local_unnamed_addr #1 {
%3 = shl i32 %0, %1
; CHECK: r3 <<= 32
; CHECK: r3 >>= 32
%4 = sub i32 0, %1
%5 = and i32 %4, 31
%6 = lshr i32 %0, %5
; CHECK: r1 <<= 32
; CHECK: r1 >>= 32
%7 = or i32 %6, %3
ret i32 %7
}
attributes #0 = { norecurse nounwind }
attributes #1 = { norecurse nounwind readnone }
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