| ; Check that we don't crash on corner cases. |
| ; RUN: opt < %s -S -loop-unroll -unroll-max-iteration-count-to-analyze=1000 -unroll-threshold=10 -unroll-percent-dynamic-cost-saved-threshold=20 -o /dev/null |
| target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| |
| @known_constant = internal unnamed_addr constant [10 x i32] [i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1], align 16 |
| |
| define void @foo1() { |
| entry: |
| br label %for.body |
| |
| for.body: |
| %phi = phi i64 [ 0, %entry ], [ %inc, %for.body ] |
| %idx = zext i32 undef to i64 |
| %add.ptr = getelementptr inbounds i64, i64* null, i64 %idx |
| %inc = add nuw nsw i64 %phi, 1 |
| %cmp = icmp ult i64 %inc, 999 |
| br i1 %cmp, label %for.body, label %for.exit |
| |
| for.exit: |
| ret void |
| } |
| |
| define void @foo2() { |
| entry: |
| br label %for.body |
| |
| for.body: |
| %phi = phi i64 [ 0, %entry ], [ %inc, %for.body ] |
| %x = getelementptr i32, <4 x i32*> undef, <4 x i32> <i32 1, i32 1, i32 1, i32 1> |
| %inc = add nuw nsw i64 %phi, 1 |
| %cmp = icmp ult i64 %inc, 999 |
| br i1 %cmp, label %for.body, label %for.exit |
| |
| for.exit: |
| ret void |
| } |
| |
| define void @cmp_undef() { |
| entry: |
| br label %for.body |
| |
| for.body: ; preds = %for.inc, %entry |
| %iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.inc ] |
| %arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %iv.0 |
| %x1 = load i32, i32* %arrayidx1, align 4 |
| %cmp = icmp eq i32 %x1, undef |
| br i1 %cmp, label %if.then, label %for.inc |
| |
| if.then: ; preds = %for.body |
| br label %for.inc |
| |
| for.inc: ; preds = %for.body, %if.then |
| %iv.1 = add nuw nsw i64 %iv.0, 1 |
| %exitcond = icmp eq i64 %iv.1, 10 |
| br i1 %exitcond, label %for.end, label %for.body |
| |
| for.end: ; preds = %for.inc |
| ret void |
| } |
| |
| define void @switch() { |
| entry: |
| br label %for.body |
| |
| for.body: |
| %iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.inc ] |
| %arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %iv.0 |
| %x1 = load i32, i32* %arrayidx1, align 4 |
| switch i32 %x1, label %l1 [ |
| ] |
| |
| l1: |
| %x2 = add i32 %x1, 2 |
| br label %for.inc |
| |
| for.inc: |
| %iv.1 = add nuw nsw i64 %iv.0, 1 |
| %exitcond = icmp eq i64 %iv.1, 10 |
| br i1 %exitcond, label %for.end, label %for.body |
| |
| for.end: |
| ret void |
| } |
| |
| define <4 x i32> @vec_load() { |
| entry: |
| br label %for.body |
| |
| for.body: |
| %phi = phi i64 [ 0, %entry ], [ %inc, %for.body ] |
| %vec_phi = phi <4 x i32> [ <i32 0, i32 0, i32 0, i32 0>, %entry ], [ %r, %for.body ] |
| %arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %phi |
| %bc = bitcast i32* %arrayidx to <4 x i32>* |
| %x = load <4 x i32>, < 4 x i32>* %bc, align 4 |
| %r = add <4 x i32> %x, %vec_phi |
| %inc = add nuw nsw i64 %phi, 1 |
| %cmp = icmp ult i64 %inc, 999 |
| br i1 %cmp, label %for.body, label %for.exit |
| |
| for.exit: |
| ret <4 x i32> %r |
| } |