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, 186 deletions

diff --git a/llvm/test/Transforms/DeadArgElim/aggregates.ll b/llvm/test/Transforms/DeadArgElim/aggregates.ll
deleted file mode 100644
index 2eca76a4a4e..00000000000
--- a/llvm/test/Transforms/DeadArgElim/aggregates.ll
+++ /dev/null
@@ -1,186 +0,0 @@
-; RUN: opt -S -deadargelim %s | FileCheck %s
-
-; Case 0: the basic example: an entire aggregate use is returned, but it's
-; actually only used in ways we can eliminate. We gain benefit from analysing
-; the "use" and applying its results to all sub-values.
-
-; CHECK-LABEL: define internal void @agguse_dead()
-
-define internal { i32, i32 } @agguse_dead() {
-  ret { i32, i32 } { i32 0, i32 1 }
-}
-
-define internal { i32, i32 } @test_agguse_dead() {
-  %val = call { i32, i32 } @agguse_dead()
-  ret { i32, i32 } %val
-}
-
-
-
-; Case 1: an opaque use of the aggregate exists (in this case dead). Otherwise
-; only one value is used, so function can be simplified.
-
-; CHECK-LABEL: define internal i32 @rets_independent_if_agguse_dead()
-; CHECK: [[RET:%.*]] = extractvalue { i32, i32 } { i32 0, i32 1 }, 1
-; CHECK: ret i32 [[RET]]
-
-define internal { i32, i32 } @rets_independent_if_agguse_dead() {
-  ret { i32, i32 } { i32 0, i32 1 }
-}
-
-define internal { i32, i32 } @test_rets_independent_if_agguse_dead(i1 %tst) {
-  %val = call { i32, i32 } @rets_independent_if_agguse_dead()
-  br i1 %tst, label %use_1, label %use_aggregate
-
-use_1:
-  ; This use can be classified as applying only to ret 1.
-  %val0 = extractvalue { i32, i32 } %val, 1
-  call void @callee(i32 %val0)
-  ret { i32, i32 } undef
-
-use_aggregate:
-  ; This use is assumed to apply to both 0 and 1.
-  ret { i32, i32 } %val
-}
-
-; Case 2: an opaque use of the aggregate exists (in this case *live*). Other
-; uses shouldn't matter.
-
-; CHECK-LABEL: define internal { i32, i32 } @rets_live_agguse()
-; CHECK: ret { i32, i32 } { i32 0, i32 1 }
-
-define internal { i32, i32 } @rets_live_agguse() {
-  ret { i32, i32} { i32 0, i32 1 }
-}
-
-define { i32, i32 } @test_rets_live_aggues(i1 %tst) {
-  %val = call { i32, i32 } @rets_live_agguse()
-  br i1 %tst, label %use_1, label %use_aggregate
-
-use_1:
-  ; This use can be classified as applying only to ret 1.
-  %val0 = extractvalue { i32, i32 } %val, 1
-  call void @callee(i32 %val0)
-  ret { i32, i32 } undef
-
-use_aggregate:
-  ; This use is assumed to apply to both 0 and 1.
-  ret { i32, i32 } %val
-}
-
-declare void @callee(i32)
-
-; Case 3: the insertvalue meant %in was live if ret-slot-1 was, but we were only
-; tracking multiple ret-slots for struct types. So %in was eliminated
-; incorrectly.
-
-; CHECK-LABEL: define internal [2 x i32] @array_rets_have_multiple_slots(i32 %in)
-
-define internal [2 x i32] @array_rets_have_multiple_slots(i32 %in) {
-  %ret = insertvalue [2 x i32] undef, i32 %in, 1
-  ret [2 x i32] %ret
-}
-
-define [2 x i32] @test_array_rets_have_multiple_slots() {
-  %res = call [2 x i32] @array_rets_have_multiple_slots(i32 42)
-  ret [2 x i32] %res
-}
-
-; Case 4: we can remove some retvals from the array. It's nice to produce an
-; array again having done so (rather than converting it to a struct).
-
-; CHECK-LABEL: define internal [2 x i32] @can_shrink_arrays()
-; CHECK: [[VAL0:%.*]] = extractvalue [3 x i32] [i32 42, i32 43, i32 44], 0
-; CHECK: [[RESTMP:%.*]] = insertvalue [2 x i32] undef, i32 [[VAL0]], 0
-; CHECK: [[VAL2:%.*]] = extractvalue [3 x i32] [i32 42, i32 43, i32 44], 2
-; CHECK: [[RES:%.*]] = insertvalue [2 x i32] [[RESTMP]], i32 [[VAL2]], 1
-; CHECK: ret [2 x i32] [[RES]]
-
-; CHECK-LABEL: define void @test_can_shrink_arrays()
-
-define internal [3 x i32] @can_shrink_arrays() {
-  ret [3 x i32] [i32 42, i32 43, i32 44]
-}
-
-define void @test_can_shrink_arrays() {
-  %res = call [3 x i32] @can_shrink_arrays()
-
-  %res.0 = extractvalue [3 x i32] %res, 0
-  call void @callee(i32 %res.0)
-
-  %res.2 = extractvalue [3 x i32] %res, 2
-  call void @callee(i32 %res.2)
-
-  ret void
-}
-
-; Case 5: %in gets passed directly to the return. It should mark be marked as
-; used if *any* of the return values are, not just if value 0 is.
-
-; CHECK-LABEL: define internal i32 @ret_applies_to_all({ i32, i32 } %in)
-; CHECK: [[RET:%.*]] = extractvalue { i32, i32 } %in, 1
-; CHECK: ret i32 [[RET]]
-
-define internal {i32, i32} @ret_applies_to_all({i32, i32} %in) {
-  ret {i32, i32} %in
-}
-
-define i32 @test_ret_applies_to_all() {
-  %val = call {i32, i32} @ret_applies_to_all({i32, i32} {i32 42, i32 43})
-  %ret = extractvalue {i32, i32} %val, 1
-  ret i32 %ret
-}
-
-; Case 6: When considering @mid, the return instruciton has sub-value 0
-; unconditionally live, but 1 only conditionally live. Since at that level we're
-; applying the results to the whole of %res, this means %res is live and cannot
-; be reduced. There is scope for further optimisation here (though not visible
-; in this test-case).
-
-; CHECK-LABEL: define internal { i8*, i32 } @inner()
-
-define internal {i8*, i32} @mid() {
-  %res = call {i8*, i32} @inner()
-  %intval = extractvalue {i8*, i32} %res, 1
-  %tst = icmp eq i32 %intval, 42
-  br i1 %tst, label %true, label %true
-
-true:
-  ret {i8*, i32} %res
-}
-
-define internal {i8*, i32} @inner() {
-  ret {i8*, i32} {i8* null, i32 42}
-}
-
-define internal i8 @outer() {
-  %res = call {i8*, i32} @mid()
-  %resptr = extractvalue {i8*, i32} %res, 0
-
-  %val = load i8, i8* %resptr
-  ret i8 %val
-}
-
-define internal { i32 } @agg_ret() {
-entry:
-  unreachable
-}
-
-; CHECK-LABEL: define void @PR24906
-; CHECK: %[[invoke:.*]] = invoke i32 @agg_ret()
-; CHECK: %[[oldret:.*]] = insertvalue { i32 } undef, i32 %[[invoke]], 0
-; CHECK: phi { i32 } [ %[[oldret]],
-define void @PR24906() personality i32 (i32)* undef {
-entry:
-  %tmp2 = invoke { i32 } @agg_ret()
-          to label %bb3 unwind label %bb4
-
-bb3:
-  %tmp3 = phi { i32 } [ %tmp2, %entry ]
-  unreachable
-
-bb4:
-  %tmp4 = landingpad { i8*, i32 }
-          cleanup
-  unreachable
-}