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, 197 deletions

diff --git a/llvm/test/Transforms/LoopVectorize/if-conversion.ll b/llvm/test/Transforms/LoopVectorize/if-conversion.ll
deleted file mode 100644
index dfc062eaada..00000000000
--- a/llvm/test/Transforms/LoopVectorize/if-conversion.ll
+++ /dev/null
@@ -1,197 +0,0 @@
-; RUN: opt < %s  -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -enable-if-conversion -dce -instcombine -S | FileCheck %s
-
-target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
-
-; This is the loop in this example:
-;
-;int function0(int *a, int *b, int start, int end) {
-;
-;  for (int i=start; i<end; ++i) {
-;    unsigned k = a[i];
-;
-;    if (a[i] > b[i])   <------ notice the IF inside the loop.
-;      k = k * 5 + 3;
-;
-;    a[i] = k;  <---- K is a phi node that becomes vector-select.
-;  }
-;}
-
-;CHECK-LABEL: @function0(
-;CHECK: load <4 x i32>
-;CHECK: icmp sgt <4 x i32>
-;CHECK: mul <4 x i32>
-;CHECK: add <4 x i32>
-;CHECK: select <4 x i1>
-;CHECK: ret i32
-define i32 @function0(i32* nocapture %a, i32* nocapture %b, i32 %start, i32 %end) nounwind uwtable ssp {
-entry:
-  %cmp16 = icmp slt i32 %start, %end
-  br i1 %cmp16, label %for.body.lr.ph, label %for.end
-
-for.body.lr.ph:
-  %0 = sext i32 %start to i64
-  br label %for.body
-
-for.body:
-  %indvars.iv = phi i64 [ %0, %for.body.lr.ph ], [ %indvars.iv.next, %if.end ]
-  %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
-  %1 = load i32, i32* %arrayidx, align 4
-  %arrayidx4 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
-  %2 = load i32, i32* %arrayidx4, align 4
-  %cmp5 = icmp sgt i32 %1, %2
-  br i1 %cmp5, label %if.then, label %if.end
-
-if.then:
-  %mul = mul i32 %1, 5
-  %add = add i32 %mul, 3
-  br label %if.end
-
-if.end:
-  %k.0 = phi i32 [ %add, %if.then ], [ %1, %for.body ]
-  store i32 %k.0, i32* %arrayidx, align 4
-  %indvars.iv.next = add i64 %indvars.iv, 1
-  %3 = trunc i64 %indvars.iv.next to i32
-  %cmp = icmp slt i32 %3, %end
-  br i1 %cmp, label %for.body, label %for.end
-
-for.end:
-  ret i32 undef
-}
-
-
-
-; int func(int *A, int n) {
-;   unsigned sum = 0;
-;   for (int i = 0; i < n; ++i)
-;     if (A[i] > 30)
-;       sum += A[i] + 2;
-;
-;   return sum;
-; }
-
-;CHECK-LABEL: @reduction_func(
-;CHECK: load <4 x i32>
-;CHECK: icmp slt <4 x i32>
-;CHECK: add <4 x i32>
-;CHECK: select <4 x i1>
-;CHECK: ret i32
-define i32 @reduction_func(i32* nocapture %A, i32 %n) nounwind uwtable readonly ssp {
-entry:
-  %cmp10 = icmp sgt i32 %n, 0
-  br i1 %cmp10, label %for.body, label %for.end
-
-for.body:                                         ; preds = %entry, %for.inc
-  %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
-  %sum.011 = phi i32 [ %sum.1, %for.inc ], [ 0, %entry ]
-  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
-  %0 = load i32, i32* %arrayidx, align 4
-  %cmp1 = icmp sgt i32 %0, 30
-  br i1 %cmp1, label %if.then, label %for.inc
-
-if.then:                                          ; preds = %for.body
-  %add = add i32 %sum.011, 2
-  %add4 = add i32 %add, %0
-  br label %for.inc
-
-for.inc:                                          ; preds = %for.body, %if.then
-  %sum.1 = phi i32 [ %add4, %if.then ], [ %sum.011, %for.body ]
-  %indvars.iv.next = add i64 %indvars.iv, 1
-  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
-  %exitcond = icmp eq i32 %lftr.wideiv, %n
-  br i1 %exitcond, label %for.end, label %for.body
-
-for.end:                                          ; preds = %for.inc, %entry
-  %sum.0.lcssa = phi i32 [ 0, %entry ], [ %sum.1, %for.inc ]
-  ret i32 %sum.0.lcssa
-}
-
-@a = common global [1 x i32*] zeroinitializer, align 8
-@c = common global i32* null, align 8
-
-; We use to if convert this loop. This is not safe because there is a trapping
-; constant expression.
-; PR16729
-
-; CHECK-LABEL: trapping_constant_expression
-; CHECK-NOT: or <4 x i32>
-
-define i32 @trapping_constant_expression() {
-entry:
-  br label %for.body
-
-for.body:
-  %inc3 = phi i32 [ 0, %entry ], [ %inc, %cond.end ]
-  %or2 = phi i32 [ 0, %entry ], [ %or, %cond.end ]
-  br i1 icmp eq (i32** getelementptr inbounds ([1 x i32*], [1 x i32*]* @a, i64 0, i64 0), i32** @c), label %cond.false, label %cond.end
-
-cond.false:
-  br label %cond.end
-
-cond.end:
-  %cond = phi i32 [ sdiv (i32 1, i32 zext (i1 icmp eq (i32** getelementptr inbounds ([1 x i32*], [1 x i32*]* @a, i64 0, i64 0), i32** @c) to i32)), %cond.false ], [ 0, %for.body ]
-  %or = or i32 %or2, %cond
-  %inc = add nsw i32 %inc3, 1
-  %cmp = icmp slt i32 %inc, 128
-  br i1 %cmp, label %for.body, label %for.end
-
-for.end:
-  ret i32 %or
-}
-
-; Neither should we if-convert if there is an instruction operand that is a
-; trapping constant expression.
-; PR16729
-
-; CHECK-LABEL: trapping_constant_expression2
-; CHECK-NOT: or <4 x i32>
-
-define i32 @trapping_constant_expression2() {
-entry:
-  br label %for.body
-
-for.body:
-  %inc3 = phi i32 [ 0, %entry ], [ %inc, %cond.end ]
-  %or2 = phi i32 [ 0, %entry ], [ %or, %cond.end ]
-  br i1 icmp eq (i32** getelementptr inbounds ([1 x i32*], [1 x i32*]* @a, i64 0, i64 0), i32** @c), label %cond.false, label %cond.end
-
-cond.false:
-  %cond.1 = or i32 %inc3, sdiv (i32 1, i32 zext (i1 icmp eq (i32** getelementptr inbounds ([1 x i32*], [1 x i32*]* @a, i64 0, i64 1), i32** @c) to i32))
-  br label %cond.end
-
-cond.end:
-  %cond = phi i32 [ %cond.1, %cond.false ], [ %inc3, %for.body ]
-  %or = or i32 %or2, %cond
-  %inc = add nsw i32 %inc3, 1
-  %cmp = icmp slt i32 %inc, 128
-  br i1 %cmp, label %for.body, label %for.end
-
-for.end:
-  ret i32 %or
-}
-
-; Handle PHI with single incoming value having a full mask.
-; PR34523
-
-; CHECK-LABEL: PR34523
-; CHECK: vector.body
-
-define void @PR34523() {
-bb1:
-  br label %bb2
-
-bb2:                                             ; preds = %bb4, %bb1
-  %i = phi i16 [ undef, %bb1 ], [ %_tmp2, %bb4 ]
-  br label %bb3
-
-bb3:                                             ; preds = %bb2
-  %_tmp1 = phi [1 x [1 x i32]]* [ undef, %bb2 ]
-  br label %bb4
-
-bb4:                                             ; preds = %bb3
-  %_tmp2 = add i16 %i, 1
-  %_tmp3 = icmp slt i16 %_tmp2, 2
-  br i1 %_tmp3, label %bb2, label %bb5
-
-bb5:                                             ; preds = %bb4
-  unreachable
-}