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; RUN: llc < %s -march=bpf -verify-machineinstrs | FileCheck %s
; Source Code:
; struct loc_prog {
; unsigned int ip;
; int len;
; };
; int exec_prog(struct loc_prog *prog) {
; if (prog->ip < prog->len) {
; int x = prog->ip;
; if (x < 3)
; prog->ip += 2;
; }
; return 3;
; }
; Compilation flag:
; clang -target bpf -O2 -S -emit-llvm t.c
%struct.loc_prog = type { i32, i32 }
; Function Attrs: nofree norecurse nounwind willreturn
define dso_local i32 @exec_prog(%struct.loc_prog* nocapture %prog) local_unnamed_addr {
entry:
%ip = getelementptr inbounds %struct.loc_prog, %struct.loc_prog* %prog, i64 0, i32 0
%0 = load i32, i32* %ip, align 4
%len = getelementptr inbounds %struct.loc_prog, %struct.loc_prog* %prog, i64 0, i32 1
%1 = load i32, i32* %len, align 4
%cmp = icmp ult i32 %0, %1
%cmp2 = icmp slt i32 %0, 3
%or.cond = and i1 %cmp2, %cmp
; CHECK: r{{[0-9]+}} <<= 32
; CHECK: r{{[0-9]+}} s>>= 32
br i1 %or.cond, label %if.then3, label %if.end5
if.then3: ; preds = %entry
%add = add nsw i32 %0, 2
store i32 %add, i32* %ip, align 4
br label %if.end5
if.end5: ; preds = %if.then3, %entry
ret i32 3
}
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