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, 139 deletions

diff --git a/llvm/test/Transforms/SimpleLoopUnswitch/exponential-nontrivial-unswitch-nested.ll b/llvm/test/Transforms/SimpleLoopUnswitch/exponential-nontrivial-unswitch-nested.ll
deleted file mode 100644
index 711c476a5e5..00000000000
--- a/llvm/test/Transforms/SimpleLoopUnswitch/exponential-nontrivial-unswitch-nested.ll
+++ /dev/null
@@ -1,139 +0,0 @@
-;
-; There should be just a single copy of each loop when strictest mutiplier
-; candidates formula (unscaled candidates == 0) is enforced:
-
-; RUN: opt < %s -enable-nontrivial-unswitch -enable-unswitch-cost-multiplier=true \
-; RUN:     -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=1 \
-; RUN:     -passes='loop(unswitch),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP1
-;
-; RUN: opt < %s -enable-nontrivial-unswitch -enable-unswitch-cost-multiplier=true \
-; RUN:     -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=16 \
-; RUN:     -passes='loop(unswitch),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP1
-;
-;
-; When we relax the candidates part of a multiplier formula
-; (unscaled candidates == 4) we start getting  some unswitches,
-; which leads to siblings multiplier kicking in.
-;
-; RUN: opt < %s -enable-nontrivial-unswitch -enable-unswitch-cost-multiplier=true \
-; RUN:     -unswitch-num-initial-unscaled-candidates=4 -unswitch-siblings-toplevel-div=1 \
-; RUN:     -passes='loop(unswitch),print<loops>' -disable-output 2>&1 | \
-; RUN:     sort -b -k 1 | FileCheck %s --check-prefixes=LOOP-UNSCALE4-DIV1
-;
-; NB: sort -b is essential here and below, otherwise blanks might lead to different
-; order depending on locale.
-;
-; RUN: opt < %s -enable-nontrivial-unswitch -enable-unswitch-cost-multiplier=true \
-; RUN:     -unswitch-num-initial-unscaled-candidates=4 -unswitch-siblings-toplevel-div=2 \
-; RUN:     -passes='loop(unswitch),print<loops>' -disable-output 2>&1 | \
-; RUN:     sort -b -k 1 | FileCheck %s --check-prefixes=LOOP-UNSCALE4-DIV2
-;
-;
-; Get
-;    2^(num conds) == 2^5 = 32
-; loop nests when cost multiplier is disabled:
-;
-; RUN: opt < %s -enable-nontrivial-unswitch -enable-unswitch-cost-multiplier=false \
-; RUN:     -passes='loop(unswitch),print<loops>' -disable-output 2>&1 | \
-; RUN:	   sort -b -k 1 | FileCheck %s --check-prefixes=LOOP32
-;
-; Single loop nest, not unswitched
-; LOOP1:     Loop at depth 1 containing:
-; LOOP1:     Loop at depth 2 containing:
-; LOOP1:     Loop at depth 3 containing:
-; LOOP1-NOT: Loop at depth {{[0-9]+}} containing:
-;
-; Half unswitched loop nests, with unscaled4 and div1 it gets less depth1 loops unswitched
-; since they have more cost.
-; LOOP-UNSCALE4-DIV1-COUNT-6: Loop at depth 1 containing:
-; LOOP-UNSCALE4-DIV1-COUNT-19: Loop at depth 2 containing:
-; LOOP-UNSCALE4-DIV1-COUNT-29: Loop at depth 3 containing:
-; LOOP-UNSCALE4-DIV1-NOT:      Loop at depth {{[0-9]+}} containing:
-;
-; Half unswitched loop nests, with unscaled4 and div2 it gets more depth1 loops unswitched
-; as div2 kicks in.
-; LOOP-UNSCALE4-DIV2-COUNT-11: Loop at depth 1 containing:
-; LOOP-UNSCALE4-DIV2-COUNT-22: Loop at depth 2 containing:
-; LOOP-UNSCALE4-DIV2-COUNT-29: Loop at depth 3 containing:
-; LOOP-UNSCALE4-DIV2-NOT:      Loop at depth {{[0-9]+}} containing:
-;
-; 32 loop nests, fully unswitched
-; LOOP32-COUNT-32: Loop at depth 1 containing:
-; LOOP32-COUNT-32: Loop at depth 2 containing:
-; LOOP32-COUNT-32: Loop at depth 3 containing:
-; LOOP32-NOT:      Loop at depth {{[0-9]+}} containing:
-
-declare void @bar()
-
-define void @loop_nested3_conds5(i32* %addr, i1 %c1, i1 %c2, i1 %c3, i1 %c4, i1 %c5) {
-entry:
-  %addr1 = getelementptr i32, i32* %addr, i64 0
-  %addr2 = getelementptr i32, i32* %addr, i64 1
-  %addr3 = getelementptr i32, i32* %addr, i64 2
-  br label %outer
-outer:
-  %iv1 = phi i32 [0, %entry], [%iv1.next, %outer_latch]
-  %iv1.next = add i32 %iv1, 1
-  ;; skip nontrivial unswitch
-  call void @bar()
-  br label %middle
-middle:
-  %iv2 = phi i32 [0, %outer], [%iv2.next, %middle_latch]
-  %iv2.next = add i32 %iv2, 1
-  ;; skip nontrivial unswitch
-  call void @bar()
-  br label %loop
-loop:
-  %iv3 = phi i32 [0, %middle], [%iv3.next, %loop_latch]
-  %iv3.next = add i32 %iv3, 1
-  ;; skip nontrivial unswitch
-  call void @bar()
-  br i1 %c1, label %loop_next1_left, label %loop_next1_right
-loop_next1_left:
-  br label %loop_next1
-loop_next1_right:
-  br label %loop_next1
-
-loop_next1:
-  br i1 %c2, label %loop_next2_left, label %loop_next2_right
-loop_next2_left:
-  br label %loop_next2
-loop_next2_right:
-  br label %loop_next2
-
-loop_next2:
-  br i1 %c3, label %loop_next3_left, label %loop_next3_right
-loop_next3_left:
-  br label %loop_next3
-loop_next3_right:
-  br label %loop_next3
-
-loop_next3:
-  br i1 %c4, label %loop_next4_left, label %loop_next4_right
-loop_next4_left:
-  br label %loop_next4
-loop_next4_right:
-  br label %loop_next4
-
-loop_next4:
-  br i1 %c5, label %loop_latch_left, label %loop_latch_right
-loop_latch_left:
-  br label %loop_latch
-loop_latch_right:
-  br label %loop_latch
-
-loop_latch:
-  store volatile i32 0, i32* %addr1
-  %test_loop = icmp slt i32 %iv3, 50
-  br i1 %test_loop, label %loop, label %middle_latch
-middle_latch:
-  store volatile i32 0, i32* %addr2
-  %test_middle = icmp slt i32 %iv2, 50
-  br i1 %test_middle, label %middle, label %outer_latch
-outer_latch:
-  store volatile i32 0, i32* %addr3
-  %test_outer = icmp slt i32 %iv1, 50
-  br i1 %test_outer, label %outer, label %exit
-exit:
-  ret void
-}