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, 54 deletions

diff --git a/llvm/test/Transforms/IndVarSimplify/inner-loop.ll b/llvm/test/Transforms/IndVarSimplify/inner-loop.ll
deleted file mode 100644
index b849c4e3423..00000000000
--- a/llvm/test/Transforms/IndVarSimplify/inner-loop.ll
+++ /dev/null
@@ -1,54 +0,0 @@
-; RUN: opt < %s -indvars -S | FileCheck %s
-
-; This is regression test for the bug in ScalarEvolution::isKnownPredicate.
-; It does not check whether SCEV is available at loop entry before invoking
-; and utility function isLoopEntryGuardedByCond and that leads to miscompile.
-
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128-ni:1"
-target triple = "x86_64-unknown-linux-gnu"
-
-declare void @foo(i64)
-declare void @bar(i32)
-
-define void @test(i8* %arr) {
-entry:
-  br label %outer_header
-
-outer_header:
-  %i = phi i32 [40, %entry], [%i.next, %outer_latch]
-  %i.64 = sext i32 %i to i64
-  br label %inner_header
-
-inner_header:
-  %j = phi i32 [27, %outer_header], [%j.next, %inner_backedge]
-  %j1 = zext i32 %j to i64
-; The next 4 lines are required for avoid widening of %j and
-; SCEV at %cmp would not be AddRec.
-  %gep = getelementptr inbounds i8, i8*  %arr, i64 %j1
-  %ld = load i8, i8* %gep
-  %ec = icmp eq i8 %ld, 0
-  br i1 %ec, label %return, label %inner_backedge
-
-inner_backedge:
-  %cmp = icmp ult i32 %j, %i
-  %s = select i1 %cmp, i32 %i, i32 %j
-; Select should not be simplified because if
-; %i == 26 and %j == 27, %s should be equal to %j.
-; In case of a bug the instruction is simplified to
-; %s = select i1 true, i32 %0, i32 %j
-; CHECK-NOT: %s = select i1 true
-  call void @bar(i32 %s)
-  %j.next = add nsw i32 %j, -2
-  %cond = icmp ult i32 %j, 3
-  br i1 %cond, label %outer_latch, label %inner_header
-
-outer_latch:
-  %i.next = add i32 %i, -1
-  %cond2 = icmp sgt i32 %i.next, 13
-; This line is just for forcing widening of %i
-  call void @foo(i64 %i.64)
-  br i1 %cond2, label %outer_header, label %return
-
-return:
-  ret void
-}