1 ; RUN: opt -S -basicaa -gvn < %s | FileCheck %s 2 3 target datalayout = "e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128" 4 target triple = "i386-apple-macosx10.6.0" 5 6 ; The load and store address in the loop body could alias so the load 7 ; can't be hoisted above the store and out of the loop. 8 9 declare void @llvm.memset.p0i8.i32(i8* nocapture writeonly, i8, i32, i1) 10 11 define i32 @foo(i32 %x, i32 %z, i32 %n) { 12 entry: 13 %pool = alloca [59 x i32], align 4 14 %tmp = bitcast [59 x i32]* %pool to i8* 15 call void @llvm.memset.p0i8.i32(i8* align 4 nonnull %tmp, i8 0, i32 236, i1 false) 16 %cmp3 = icmp eq i32 %n, 0 17 br i1 %cmp3, label %for.end, label %for.body.lr.ph 18 19 for.body.lr.ph: ; preds = %entry 20 %add = add i32 %z, %x 21 %and = and i32 %add, 2147483647 22 %sub = add nsw i32 %and, -2137521902 23 %arrayidx = getelementptr inbounds [59 x i32], [59 x i32]* %pool, i32 0, i32 %sub 24 %arrayidx1 = getelementptr inbounds [59 x i32], [59 x i32]* %pool, i32 0, i32 42 25 br label %for.body 26 27 for.body: ; preds = %for.body.lr.ph, %for.body 28 %i.04 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ] 29 store i32 %i.04, i32* %arrayidx, align 4 30 %tmp1 = load i32, i32* %arrayidx1, align 4 31 %inc = add nuw i32 %i.04, 1 32 %exitcond = icmp ne i32 %inc, %n 33 br i1 %exitcond, label %for.body, label %for.end.loopexit 34 35 for.end.loopexit: ; preds = %for.body 36 %lcssa = phi i32 [ %tmp1, %for.body ] 37 br label %for.end 38 39 for.end: ; preds = %for.end.loopexit, %entry 40 %s = phi i32 [ 0, %entry ], [ %lcssa, %for.end.loopexit ] 41 ; CHECK: ret i32 %s 42 ret i32 %s 43 } 44
