diff options
Diffstat (limited to 'llvm/test/Transforms/LoopUnroll/runtime-loop-non-exiting-latch.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopUnroll/runtime-loop-non-exiting-latch.ll | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopUnroll/runtime-loop-non-exiting-latch.ll b/llvm/test/Transforms/LoopUnroll/runtime-loop-non-exiting-latch.ll new file mode 100644 index 00000000000..6915981375a --- /dev/null +++ b/llvm/test/Transforms/LoopUnroll/runtime-loop-non-exiting-latch.ll @@ -0,0 +1,27 @@ +; REQUIRES: asserts +; RUN: opt < %s -S -loop-unroll -unroll-runtime=true -unroll-allow-remainder=true -unroll-count=4 + +; Make sure that the runtime unroll does not break with a non-exiting latch. +define i32 @test(i32* %a, i32* %b, i32* %c, i64 %n) { +entry: + br label %while.cond + +while.cond: ; preds = %while.body, %entry + %i.0 = phi i64 [ 0, %entry ], [ %inc, %while.body ] + %cmp = icmp slt i64 %i.0, %n + br i1 %cmp, label %while.body, label %while.end + +while.body: ; preds = %while.cond + %arrayidx = getelementptr inbounds i32, i32* %b, i64 %i.0 + %0 = load i32, i32* %arrayidx + %arrayidx1 = getelementptr inbounds i32, i32* %c, i64 %i.0 + %1 = load i32, i32* %arrayidx1 + %mul = mul nsw i32 %0, %1 + %arrayidx2 = getelementptr inbounds i32, i32* %a, i64 %i.0 + store i32 %mul, i32* %arrayidx2 + %inc = add nsw i64 %i.0, 1 + br label %while.cond + +while.end: ; preds = %while.cond + ret i32 0 +} |
