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, 185 deletions

diff --git a/llvm/test/Transforms/SimpleLoopUnswitch/basictest.ll b/llvm/test/Transforms/SimpleLoopUnswitch/basictest.ll
deleted file mode 100644
index 240f433a8db..00000000000
--- a/llvm/test/Transforms/SimpleLoopUnswitch/basictest.ll
+++ /dev/null
@@ -1,185 +0,0 @@
-; RUN: opt -passes='loop(unswitch),verify<loops>' -S < %s | FileCheck %s
-; RUN: opt -enable-mssa-loop-dependency=true -verify-memoryssa -passes='loop(unswitch),verify<loops>' -S < %s | FileCheck %s
-
-define i32 @test(i32* %A, i1 %C) {
-entry:
-	br label %no_exit
-no_exit:		; preds = %no_exit.backedge, %entry
-	%i.0.0 = phi i32 [ 0, %entry ], [ %i.0.0.be, %no_exit.backedge ]		; <i32> [#uses=3]
-	%gep.upgrd.1 = zext i32 %i.0.0 to i64		; <i64> [#uses=1]
-	%tmp.7 = getelementptr i32, i32* %A, i64 %gep.upgrd.1		; <i32*> [#uses=4]
-	%tmp.13 = load i32, i32* %tmp.7		; <i32> [#uses=2]
-	%tmp.14 = add i32 %tmp.13, 1		; <i32> [#uses=1]
-	store i32 %tmp.14, i32* %tmp.7
-	br i1 %C, label %then, label %endif
-then:		; preds = %no_exit
-	%tmp.29 = load i32, i32* %tmp.7		; <i32> [#uses=1]
-	%tmp.30 = add i32 %tmp.29, 2		; <i32> [#uses=1]
-	store i32 %tmp.30, i32* %tmp.7
-	%inc9 = add i32 %i.0.0, 1		; <i32> [#uses=2]
-	%tmp.112 = icmp ult i32 %inc9, 100000		; <i1> [#uses=1]
-	br i1 %tmp.112, label %no_exit.backedge, label %return
-no_exit.backedge:		; preds = %endif, %then
-	%i.0.0.be = phi i32 [ %inc9, %then ], [ %inc, %endif ]		; <i32> [#uses=1]
-	br label %no_exit
-endif:		; preds = %no_exit
-	%inc = add i32 %i.0.0, 1		; <i32> [#uses=2]
-	%tmp.1 = icmp ult i32 %inc, 100000		; <i1> [#uses=1]
-	br i1 %tmp.1, label %no_exit.backedge, label %return
-return:		; preds = %endif, %then
-	ret i32 %tmp.13
-}
-
-; This simple test would normally unswitch, but should be inhibited by the presence of
-; the noduplicate call.
-
-; CHECK-LABEL: @test2(
-define i32 @test2(i32* %var) {
-  %mem = alloca i32
-  store i32 2, i32* %mem
-  %c = load i32, i32* %mem
-
-  br label %loop_begin
-
-loop_begin:
-
-  %var_val = load i32, i32* %var
-
-  switch i32 %c, label %default [
-      i32 1, label %inc
-      i32 2, label %dec
-  ]
-
-inc:
-  call void @incf() noreturn nounwind
-  br label %loop_begin
-dec:
-; CHECK: call void @decf()
-; CHECK-NOT: call void @decf()
-  call void @decf() noreturn nounwind noduplicate
-  br label %loop_begin
-default:
-  br label %loop_exit
-loop_exit:
-  ret i32 0
-; CHECK: }
-}
-
-; This simple test would normally unswitch, but should be inhibited by the presence of
-; the convergent call that is not control-dependent on the unswitch condition.
-
-; CHECK-LABEL: @test3(
-define i32 @test3(i32* %var) {
-  %mem = alloca i32
-  store i32 2, i32* %mem
-  %c = load i32, i32* %mem
-
-  br label %loop_begin
-
-loop_begin:
-
-  %var_val = load i32, i32* %var
-
-; CHECK: call void @conv()
-; CHECK-NOT: call void @conv()
-  call void @conv() convergent
-
-  switch i32 %c, label %default [
-      i32 1, label %inc
-      i32 2, label %dec
-  ]
-
-inc:
-  call void @incf() noreturn nounwind
-  br label %loop_begin
-dec:
-  call void @decf() noreturn nounwind
-  br label %loop_begin
-default:
-  br label %loop_exit
-loop_exit:
-  ret i32 0
-; CHECK: }
-}
-
-; Make sure we don't unswitch, as we can not find an input value %a
-; that will effectively unswitch 0 or 3 out of the loop.
-;
-; CHECK: define void @and_or_i2_as_switch_input(i2
-; CHECK: entry:
-; This is an indication that the loop has NOT been unswitched.
-; CHECK-NOT: icmp
-; CHECK: br
-define void @and_or_i2_as_switch_input(i2 %a) {
-entry:
-  br label %for.body
-
-for.body:
-  %i = phi i2 [ 0, %entry ], [ %inc, %for.inc ]
-  %and = and i2 %a, %i 
-  %or = or i2 %and, %i
-  switch i2 %or, label %sw.default [
-    i2 0, label %sw.bb
-    i2 3, label %sw.bb1
-  ]
-
-sw.bb:
-  br label %sw.epilog
-
-sw.bb1:
-  br label %sw.epilog
-
-sw.default:
-  br label %sw.epilog
-
-sw.epilog:
-  br label %for.inc
-
-for.inc:
-  %inc = add nsw i2 %i, 1
-  %cmp = icmp slt i2 %inc, 3 
-  br i1 %cmp, label %for.body, label %for.end
-
-for.end:
-  ret void
-}
-
-; Make sure we don't unswitch, as we can not find an input value %a
-; that will effectively unswitch true/false out of the loop.
-;
-; CHECK: define void @and_or_i1_as_branch_input(i1
-; CHECK: entry:
-; This is an indication that the loop has NOT been unswitched.
-; CHECK-NOT: icmp
-; CHECK: br
-define void @and_or_i1_as_branch_input(i1 %a) {
-entry:
-  br label %for.body
-
-for.body:
-  %i = phi i1 [ 0, %entry ], [ %inc, %for.inc ]
-  %and = and i1 %a, %i 
-  %or = or i1 %and, %i
-  br i1 %or, label %sw.bb, label %sw.bb1
-
-sw.bb:
-  br label %sw.epilog
-
-sw.bb1:
-  br label %sw.epilog
-
-sw.epilog:
-  br label %for.inc
-
-for.inc:
-  %inc = add nsw i1 %i, 1
-  %cmp = icmp slt i1 %inc, 1 
-  br i1 %cmp, label %for.body, label %for.end
-
-for.end:
-  ret void
-}
-
-declare void @incf() noreturn
-declare void @decf() noreturn
-declare void @conv() convergent