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, 136 deletions

diff --git a/llvm/test/Transforms/IRCE/bad_expander.ll b/llvm/test/Transforms/IRCE/bad_expander.ll
deleted file mode 100644
index bc98456a31b..00000000000
--- a/llvm/test/Transforms/IRCE/bad_expander.ll
+++ /dev/null
@@ -1,136 +0,0 @@
-; RUN: opt -verify-loop-info -irce-print-changed-loops -irce -S < %s 2>&1 | FileCheck %s
-; RUN: opt -verify-loop-info -irce-print-changed-loops -passes='require<branch-prob>,loop(irce)' -S < %s 2>&1 | FileCheck %s
-
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128-ni:1"
-target triple = "x86_64-unknown-linux-gnu"
-
-; IRCE should fail here because the preheader's exiting value is a phi from the
-; loop, and this value cannot be expanded at loop's preheader.
-
-; CHECK-NOT:   irce: in function test_01: constrained Loop
-; CHECK-NOT:   irce: in function test_02: constrained Loop
-; CHECK-LABEL: irce: in function test_03: constrained Loop
-
-define void @test_01() {
-
-; CHECK-NOT:   irce: in function test_01: constrained Loop
-
-; CHECK-LABEL: test_01
-; CHECK-NOT:   preloop
-; CHECK-NOT:   postloop
-; CHECK-NOT:   br i1 false
-; CHECK-NOT:   br i1 true
-
-entry:
-  br label %loop
-
-exit:                                       ; preds = %guarded, %loop
-  ret void
-
-loop:                                      ; preds = %guarded, %entry
-  %iv = phi i64 [ 380, %entry ], [ %limit, %guarded ]
-  %bad_phi = phi i32 [ 3, %entry ], [ %bad_phi.next, %guarded ]
-  %bad_phi.next = add nuw nsw i32 %bad_phi, 1
-  %iv.next = add nuw nsw i64 %iv, 1
-  %rc = icmp slt i64 %iv.next, 5
-  br i1 %rc, label %guarded, label %exit
-
-guarded:
-  %limit = add nsw i64 %iv, -1
-  %tmp5 = add nuw nsw i32 %bad_phi, 8
-  %tmp6 = zext i32 %tmp5 to i64
-  %tmp7 = icmp eq i64 %limit, %tmp6
-  br i1 %tmp7, label %exit, label %loop
-}
-
-; This test should fail because we are unable to prove that the division is
-; safe to expand it to preheader: if we exit by maybe_exit condition, it is
-; unsafe to execute it there.
-
-define void @test_02(i64* %p1, i64* %p2, i1 %maybe_exit) {
-
-; CHECK-LABEL: test_02
-; CHECK-NOT:   preloop
-; CHECK-NOT:   postloop
-; CHECK-NOT:   br i1 false
-; CHECK-NOT:   br i1 true
-
-
-entry:
-  %num = load i64, i64* %p1, align 4, !range !0
-  %denom = load i64, i64* %p2, align 4, !range !0
-  br label %loop
-
-exit:                                       ; preds = %guarded, %loop
-  ret void
-
-loop:                                      ; preds = %guarded, %entry
-  %iv = phi i64 [ 0, %entry ], [ %iv.next, %guarded ]
-  %iv.next = add nuw nsw i64 %iv, 1
-  br i1 %maybe_exit, label %range_check, label %exit
-
-range_check:
-  %div_result = udiv i64 %num, %denom
-  %rc = icmp slt i64 %iv.next, %div_result
-  br i1 %rc, label %guarded, label %exit
-
-guarded:
-  %gep = getelementptr i64, i64* %p1, i64 %iv.next
-  %loaded = load i64, i64* %gep, align 4
-  %tmp7 = icmp slt i64 %iv.next, 1000
-  br i1 %tmp7, label %loop, label %exit
-}
-
-define void @test_03(i64* %p1, i64* %p2, i1 %maybe_exit) {
-
-; Show that IRCE would hit test_02 if the division was safe (denom not zero).
-
-; CHECK-LABEL: test_03
-; CHECK:       entry:
-; CHECK-NEXT:    %num = load i64, i64* %p1, align 4
-; CHECK-NEXT:    [[DIV:%[^ ]+]] = udiv i64 %num, 13
-; CHECK-NEXT:    [[DIV_MINUS_1:%[^ ]+]] = add i64 [[DIV]], -1
-; CHECK-NEXT:    [[COMP1:%[^ ]+]] = icmp sgt i64 [[DIV_MINUS_1]], 0
-; CHECK-NEXT:    %exit.mainloop.at = select i1 [[COMP1]], i64 [[DIV_MINUS_1]], i64 0
-; CHECK-NEXT:    [[COMP2:%[^ ]+]] = icmp slt i64 0, %exit.mainloop.at
-; CHECK-NEXT:    br i1 [[COMP2]], label %loop.preheader, label %main.pseudo.exit
-; CHECK-NOT:     preloop
-; CHECK:       loop:
-; CHECK-NEXT:    %iv = phi i64 [ %iv.next, %guarded ], [ 0, %loop.preheader ]
-; CHECK-NEXT:    %iv.next = add nuw nsw i64 %iv, 1
-; CHECK-NEXT:    %rc = icmp slt i64 %iv.next, %div_result
-; CHECK-NEXT:    %or.cond = and i1 %maybe_exit, true
-; CHECK-NEXT:    br i1 %or.cond, label %guarded, label %exit.loopexit1
-; CHECK:       guarded:
-; CHECK-NEXT:    %gep = getelementptr i64, i64* %p1, i64 %iv.next
-; CHECK-NEXT:    %loaded = load i64, i64* %gep, align 4
-; CHECK-NEXT:    %tmp7 = icmp slt i64 %iv.next, 1000
-; CHECK-NEXT:    [[EXIT_MAIN_LOOP:%[^ ]+]] = icmp slt i64 %iv.next, %exit.mainloop.at
-; CHECK-NEXT:    br i1 [[EXIT_MAIN_LOOP]], label %loop, label %main.exit.selector
-; CHECK:       postloop
-
-entry:
-  %num = load i64, i64* %p1, align 4, !range !0
-  br label %loop
-
-exit:                                       ; preds = %guarded, %loop
-  ret void
-
-loop:                                      ; preds = %guarded, %entry
-  %iv = phi i64 [ 0, %entry ], [ %iv.next, %guarded ]
-  %iv.next = add nuw nsw i64 %iv, 1
-  br i1 %maybe_exit, label %range_check, label %exit
-
-range_check:
-  %div_result = udiv i64 %num, 13
-  %rc = icmp slt i64 %iv.next, %div_result
-  br i1 %rc, label %guarded, label %exit
-
-guarded:
-  %gep = getelementptr i64, i64* %p1, i64 %iv.next
-  %loaded = load i64, i64* %gep, align 4
-  %tmp7 = icmp slt i64 %iv.next, 1000
-  br i1 %tmp7, label %loop, label %exit
-}
-
-!0 = !{i64 0, i64 100}