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Diffstat (limited to 'llvm/test/Transforms/LoopUnroll/full-unroll-heuristics-dce.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopUnroll/full-unroll-heuristics-dce.ll | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/llvm/test/Transforms/LoopUnroll/full-unroll-heuristics-dce.ll b/llvm/test/Transforms/LoopUnroll/full-unroll-heuristics-dce.ll deleted file mode 100644 index 6ee73b6fe4f..00000000000 --- a/llvm/test/Transforms/LoopUnroll/full-unroll-heuristics-dce.ll +++ /dev/null @@ -1,38 +0,0 @@ -; RUN: opt < %s -S -loop-unroll -unroll-max-iteration-count-to-analyze=100 -unroll-dynamic-cost-savings-discount=1000 -unroll-threshold=10 -unroll-percent-dynamic-cost-saved-threshold=60 | FileCheck %s -target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" - -@known_constant = internal unnamed_addr constant [10 x i32] [i32 0, i32 0, i32 0, i32 0, i32 1, i32 0, i32 0, i32 0, i32 0, i32 0], align 16 - -; If a load becomes a constant after loop unrolling, we sometimes can simplify -; CFG. This test verifies that we handle such cases. -; After one operand in an instruction is constant-folded and the -; instruction is simplified, the other operand might become dead. -; In this test we have:: -; for i in 1..10: -; r += A[i] * B[i] -; A[i] is 0 almost at every iteration, so there is no need in loading B[i] at -; all. - - -; CHECK-LABEL: @unroll_dce -; CHECK-NOT: br i1 %exitcond, label %for.end, label %for.body -define i32 @unroll_dce(i32* noalias nocapture readonly %b) { -entry: - br label %for.body - -for.body: ; preds = %for.body, %entry - %iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.body ] - %r.0 = phi i32 [ 0, %entry ], [ %r.1, %for.body ] - %arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %iv.0 - %x1 = load i32, i32* %arrayidx1, align 4 - %arrayidx2 = getelementptr inbounds i32, i32* %b, i64 %iv.0 - %x2 = load i32, i32* %arrayidx2, align 4 - %mul = mul i32 %x1, %x2 - %r.1 = add i32 %mul, %r.0 - %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.body - ret i32 %r.1 -} |
