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| author | Stephen Hines <srhines@google.com> | 2014-12-01 14:51:49 -0800 |
|---|---|---|
| committer | Stephen Hines <srhines@google.com> | 2014-12-02 16:08:10 -0800 |
| commit | 37ed9c199ca639565f6ce88105f9e39e898d82d0 (patch) | |
| tree | 8fb36d3910e3ee4c4e1b7422f4f017108efc52f5 /test/Transforms/LoopUnroll/ephemeral.ll | |
| parent | d2327b22152ced7bc46dc629fc908959e8a52d03 (diff) | |
| download | external_llvm-37ed9c199ca639565f6ce88105f9e39e898d82d0.zip external_llvm-37ed9c199ca639565f6ce88105f9e39e898d82d0.tar.gz external_llvm-37ed9c199ca639565f6ce88105f9e39e898d82d0.tar.bz2 | |
Update aosp/master LLVM for rebase to r222494.
Change-Id: Ic787f5e0124df789bd26f3f24680f45e678eef2d
Diffstat (limited to 'test/Transforms/LoopUnroll/ephemeral.ll')
| -rw-r--r-- | test/Transforms/LoopUnroll/ephemeral.ll | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/test/Transforms/LoopUnroll/ephemeral.ll b/test/Transforms/LoopUnroll/ephemeral.ll new file mode 100644 index 0000000..9d40613 --- /dev/null +++ b/test/Transforms/LoopUnroll/ephemeral.ll @@ -0,0 +1,44 @@ +; RUN: opt < %s -S -loop-unroll -unroll-threshold=50 | FileCheck %s + +; Make sure this loop is completely unrolled... +; CHECK-LABEL: @test1 +; CHECK: for.body: +; CHECK-NOT: for.end: + +define i32 @test1(i32* nocapture %a) nounwind uwtable readonly { +entry: + br label %for.body + +for.body: ; preds = %for.body, %entry + %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] + %sum.01 = phi i32 [ 0, %entry ], [ %add, %for.body ] + %arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv + %0 = load i32* %arrayidx, align 4 + + ; This loop will be completely unrolled, even with these extra instructions, + ; but only because they're ephemeral (and, thus, free). + %1 = add nsw i32 %0, 2 + %2 = add nsw i32 %1, 4 + %3 = add nsw i32 %2, 4 + %4 = add nsw i32 %3, 4 + %5 = add nsw i32 %4, 4 + %6 = add nsw i32 %5, 4 + %7 = add nsw i32 %6, 4 + %8 = add nsw i32 %7, 4 + %9 = add nsw i32 %8, 4 + %10 = add nsw i32 %9, 4 + %ca = icmp sgt i32 %10, -7 + call void @llvm.assume(i1 %ca) + + %add = add nsw i32 %0, %sum.01 + %indvars.iv.next = add i64 %indvars.iv, 1 + %lftr.wideiv = trunc i64 %indvars.iv.next to i32 + %exitcond = icmp eq i32 %lftr.wideiv, 5 + br i1 %exitcond, label %for.end, label %for.body + +for.end: ; preds = %for.body + ret i32 %add +} + +declare void @llvm.assume(i1) nounwind + |