diff options
Diffstat (limited to 'llvm/test/Transforms/LoopVectorize/SystemZ/branch-for-predicated-block.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopVectorize/SystemZ/branch-for-predicated-block.ll | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopVectorize/SystemZ/branch-for-predicated-block.ll b/llvm/test/Transforms/LoopVectorize/SystemZ/branch-for-predicated-block.ll new file mode 100644 index 00000000000..d2e59452033 --- /dev/null +++ b/llvm/test/Transforms/LoopVectorize/SystemZ/branch-for-predicated-block.ll @@ -0,0 +1,38 @@ +; REQUIRES: asserts +; RUN: opt -mtriple=s390x-unknown-linux -mcpu=z13 -loop-vectorize \ +; RUN: -force-vector-width=2 -debug-only=loop-vectorize \ +; RUN: -disable-output < %s 2>&1 | FileCheck %s + +; Check costs for branches inside a vectorized loop around predicated +; blocks. Each such branch will be guarded with an extractelement from the +; vector compare plus a test under mask instruction. This cost is modelled on +; the extractelement of i1. + +define void @fun(i32* %arr, i64 %trip.count) { +entry: + br label %for.body + +for.body: + %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ] + %arrayidx = getelementptr inbounds i32, i32* %arr, i64 %indvars.iv + %l = load i32, i32* %arrayidx, align 4 + %cmp55 = icmp sgt i32 %l, 0 + br i1 %cmp55, label %if.then, label %for.inc + +if.then: + %sub = sub nsw i32 0, %l + store i32 %sub, i32* %arrayidx, align 4 + br label %for.inc + +for.inc: + %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 + %exitcond = icmp eq i64 %indvars.iv.next, %trip.count + br i1 %exitcond, label %for.end.loopexit, label %for.body + +for.end.loopexit: + ret void + +; CHECK: LV: Found an estimated cost of 5 for VF 2 For instruction: br i1 %cmp55, label %if.then, label %for.inc +; CHECK: LV: Found an estimated cost of 0 for VF 2 For instruction: br label %for.inc +; CHECK: LV: Found an estimated cost of 0 for VF 2 For instruction: br i1 %exitcond, label %for.end.loopexit, label %for.body +} |
