1 ; RUN: llc < %s -mtriple=i386-apple-macosx -mcpu=core2 -mattr=+sse | FileCheck %s 2 ; PR11940: Do not optimize away movb %al, %ch 3 4 %struct.APInt = type { i64* } 5 6 declare noalias i8* @calloc(i32, i32) nounwind 7 8 define void @bug(%struct.APInt* noalias nocapture sret %agg.result, %struct.APInt* nocapture %this, i32 %rotateAmt) nounwind align 2 { 9 entry: 10 ; CHECK: bug: 11 %call = tail call i8* @calloc(i32 1, i32 32) 12 %call.i = tail call i8* @calloc(i32 1, i32 32) nounwind 13 %0 = bitcast i8* %call.i to i64* 14 %rem.i = and i32 %rotateAmt, 63 15 %div.i = lshr i32 %rotateAmt, 6 16 %cmp.i = icmp eq i32 %rem.i, 0 17 br i1 %cmp.i, label %for.cond.preheader.i, label %if.end.i 18 19 for.cond.preheader.i: ; preds = %entry 20 %sub.i = sub i32 4, %div.i 21 %cmp23.i = icmp eq i32 %div.i, 4 22 br i1 %cmp23.i, label %for.body9.lr.ph.i, label %for.body.lr.ph.i 23 24 for.body.lr.ph.i: ; preds = %for.cond.preheader.i 25 %pVal.i = getelementptr inbounds %struct.APInt* %this, i32 0, i32 0 26 %.pre5.i = load i64** %pVal.i, align 4 27 br label %for.body.i 28 29 for.body.i: ; preds = %for.body.i, %for.body.lr.ph.i 30 %i.04.i = phi i32 [ 0, %for.body.lr.ph.i ], [ %inc.i, %for.body.i ] 31 %add.i = add i32 %i.04.i, %div.i 32 %arrayidx.i = getelementptr inbounds i64* %.pre5.i, i32 %add.i 33 %1 = load i64* %arrayidx.i, align 4 34 %arrayidx3.i = getelementptr inbounds i64* %0, i32 %i.04.i 35 store i64 %1, i64* %arrayidx3.i, align 4 36 %inc.i = add i32 %i.04.i, 1 37 %cmp2.i = icmp ult i32 %inc.i, %sub.i 38 br i1 %cmp2.i, label %for.body.i, label %if.end.i 39 40 if.end.i: ; preds = %for.body.i, %entry 41 %cmp81.i = icmp eq i32 %div.i, 3 42 br i1 %cmp81.i, label %_ZNK5APInt4lshrEj.exit, label %for.body9.lr.ph.i 43 44 for.body9.lr.ph.i: ; preds = %if.end.i, %for.cond.preheader.i 45 %sub58.i = sub i32 3, %div.i 46 %pVal11.i = getelementptr inbounds %struct.APInt* %this, i32 0, i32 0 47 %sh_prom.i = zext i32 %rem.i to i64 48 %sub17.i = sub i32 64, %rem.i 49 %sh_prom18.i = zext i32 %sub17.i to i64 50 %.pre.i = load i64** %pVal11.i, align 4 51 br label %for.body9.i 52 53 for.body9.i: ; preds = %for.body9.i, %for.body9.lr.ph.i 54 ; CHECK: %for.body9.i 55 ; CHECK: movb 56 ; CHECK: shrdl 57 %i6.02.i = phi i32 [ 0, %for.body9.lr.ph.i ], [ %inc21.i, %for.body9.i ] 58 %add10.i = add i32 %i6.02.i, %div.i 59 %arrayidx12.i = getelementptr inbounds i64* %.pre.i, i32 %add10.i 60 %2 = load i64* %arrayidx12.i, align 4 61 %shr.i = lshr i64 %2, %sh_prom.i 62 %add14.i = add i32 %add10.i, 1 63 %arrayidx16.i = getelementptr inbounds i64* %.pre.i, i32 %add14.i 64 %3 = load i64* %arrayidx16.i, align 4 65 %shl.i = shl i64 %3, %sh_prom18.i 66 %or.i = or i64 %shl.i, %shr.i 67 %arrayidx19.i = getelementptr inbounds i64* %0, i32 %i6.02.i 68 store i64 %or.i, i64* %arrayidx19.i, align 4 69 %inc21.i = add i32 %i6.02.i, 1 70 %cmp8.i = icmp ult i32 %inc21.i, %sub58.i 71 br i1 %cmp8.i, label %for.body9.i, label %_ZNK5APInt4lshrEj.exit 72 73 _ZNK5APInt4lshrEj.exit: ; preds = %for.body9.i, %if.end.i 74 %call.i1 = tail call i8* @calloc(i32 1, i32 32) nounwind 75 %4 = getelementptr inbounds %struct.APInt* %agg.result, i32 0, i32 0 76 store i64* %0, i64** %4, align 4 77 ret void 78 } 79
