Temporarily Revert "Add basic loop fusion pass."

As it's causing some bot failures (and per request from kbarton).

This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda.

llvm-svn: 358546

1 files changed, 0 insertions, 39 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 57de3041f57..00000000000
--- a/llvm/test/Transforms/LoopUnroll/full-unroll-heuristics-dce.ll
+++ /dev/null
@@ -1,39 +0,0 @@
-; RUN: opt < %s -S -loop-unroll -unroll-max-iteration-count-to-analyze=100 -unroll-threshold=12 -unroll-max-percent-threshold-boost=400 | FileCheck %s
-; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop(unroll-full)' -unroll-max-iteration-count-to-analyze=100 -unroll-threshold=12 -unroll-max-percent-threshold-boost=400 | 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
-}