| ; RUN: llc -mtriple=i386-unknown-linux-gnu -mattr=-slow-incdec < %s | FileCheck -check-prefix=INCDEC %s |
| ; RUN: llc -mtriple=i386-unknown-linux-gnu -mattr=+slow-incdec < %s | FileCheck -check-prefix=ADD %s |
| |
| ; check -mattr=-slow-incdec |
| ; INCDEC-NOT: addl $-1 |
| ; INCDEC: dec |
| ; INCDEC-NOT: addl $1 |
| ; INCDEC: inc |
| |
| ; check -mattr=+slow-incdec |
| ; ADD: addl $-1 |
| ; ADD-NOT: dec |
| ; ADD: addl $1 |
| ; ADD-NOT: inc |
| |
| ; Function Attrs: nounwind readonly |
| define i32 @slow_1(i32* nocapture readonly %a, i32 %s) #0 { |
| entry: |
| %cmp5 = icmp eq i32 %s, 0 |
| br i1 %cmp5, label %for.end, label %for.body.preheader |
| |
| for.body.preheader: ; preds = %entry |
| br label %for.body |
| |
| for.cond: ; preds = %for.body |
| %cmp = icmp eq i32 %dec, 0 |
| br i1 %cmp, label %for.end.loopexit, label %for.body |
| |
| for.body: ; preds = %for.body.preheader, %for.cond |
| %i.06 = phi i32 [ %dec, %for.cond ], [ %s, %for.body.preheader ] |
| %arrayidx = getelementptr inbounds i32, i32* %a, i32 %i.06 |
| %0 = load i32, i32* %arrayidx, align 4, !tbaa !1 |
| %cmp1 = icmp eq i32 %0, 0 |
| ; |
| %dec = add nsw i32 %i.06, -1 |
| br i1 %cmp1, label %for.end.loopexit, label %for.cond |
| |
| for.end.loopexit: ; preds = %for.cond, %for.body |
| %i.0.lcssa.ph = phi i32 [ 0, %for.cond ], [ %i.06, %for.body ] |
| br label %for.end |
| |
| for.end: ; preds = %for.end.loopexit, %entry |
| %i.0.lcssa = phi i32 [ 0, %entry ], [ %i.0.lcssa.ph, %for.end.loopexit ] |
| ret i32 %i.0.lcssa |
| } |
| |
| ; Function Attrs: nounwind readonly |
| define i32 @slow_2(i32* nocapture readonly %a, i32 %s) #0 { |
| entry: |
| %cmp5 = icmp eq i32 %s, 0 |
| br i1 %cmp5, label %for.end, label %for.body.preheader |
| |
| for.body.preheader: ; preds = %entry |
| br label %for.body |
| |
| for.cond: ; preds = %for.body |
| %cmp = icmp eq i32 %inc, 0 |
| br i1 %cmp, label %for.end.loopexit, label %for.body |
| |
| for.body: ; preds = %for.body.preheader, %for.cond |
| %i.06 = phi i32 [ %inc, %for.cond ], [ %s, %for.body.preheader ] |
| %arrayidx = getelementptr inbounds i32, i32* %a, i32 %i.06 |
| %0 = load i32, i32* %arrayidx, align 4, !tbaa !1 |
| %cmp1 = icmp eq i32 %0, 0 |
| %inc = add nsw i32 %i.06, 1 |
| br i1 %cmp1, label %for.end.loopexit, label %for.cond |
| |
| for.end.loopexit: ; preds = %for.cond, %for.body |
| %i.0.lcssa.ph = phi i32 [ 0, %for.cond ], [ %i.06, %for.body ] |
| br label %for.end |
| |
| for.end: ; preds = %for.end.loopexit, %entry |
| %i.0.lcssa = phi i32 [ 0, %entry ], [ %i.0.lcssa.ph, %for.end.loopexit ] |
| ret i32 %i.0.lcssa |
| } |
| |
| !1 = !{!2, !2, i64 0} |
| !2 = !{!"int", !3, i64 0} |
| !3 = !{!"omnipotent char", !4, i64 0} |
| !4 = !{!"Simple C/C++ TBAA"} |