Revert r255247, r255265, and r255286 due to serious compile-time regressions.

Revert "[DSE] Disable non-local DSE to see if the bots go green."
Revert "[DeadStoreElimination] Use range-based loops. NFC."
Revert "[DeadStoreElimination] Add support for non-local DSE."

llvm-svn: 255354

5 files changed, 0 insertions, 151 deletions

diff --git a/llvm/test/Transforms/DeadStoreElimination/cycle.ll b/llvm/test/Transforms/DeadStoreElimination/cycle.ll
deleted file mode 100644
index aa2de415c60..00000000000
--- a/llvm/test/Transforms/DeadStoreElimination/cycle.ll
+++ /dev/null
@@ -1,26 +0,0 @@
-; RUN: opt < %s -basicaa -dse -S | FileCheck %s
-
-@Table = global [535 x i32] zeroinitializer, align 4
-
-; The store in for.inc block should NOT be removed by non-local DSE.
-; CHECK: store i32 64, i32* %arrayidx
-;
-define void @foo() {
-entry:
-  br label %for.body
-
-for.body:
-  %i = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
-  %arrayidx = getelementptr inbounds [535 x i32], [535 x i32]* @Table, i32 0, i32 %i
-  store i32 %i, i32* %arrayidx, align 4
-  %cmp1 = icmp slt i32 %i, 64
-  br i1 %cmp1, label %for.inc, label %for.end
-
-for.inc:
-  store i32 64, i32* %arrayidx, align 4
-  %inc = add nsw i32 %i, 1
-  br label %for.body
-
-for.end:
-  ret void
-}
diff --git a/llvm/test/Transforms/DeadStoreElimination/ifthen.ll b/llvm/test/Transforms/DeadStoreElimination/ifthen.ll
deleted file mode 100644
index 21c87f89256..00000000000
--- a/llvm/test/Transforms/DeadStoreElimination/ifthen.ll
+++ /dev/null
@@ -1,22 +0,0 @@
-; RUN: opt < %s -basicaa -dse -enable-nonlocal-dse -S | FileCheck %s
-
-; The store and add in if.then block should be removed by non-local DSE.
-; CHECK-NOT: %stval = add
-; CHECK-NOT: store i32 %stval
-;
-define void @foo(i32* noalias nocapture %a, i32* noalias nocapture readonly %b, i32 %c) {
-entry:
-  %cmp = icmp sgt i32 %c, 0
-  br i1 %cmp, label %if.then, label %if.end
-
-if.then:
-  %0 = load i32, i32* %b, align 4
-  %stval = add nsw i32 %0, 1
-  store i32 %stval, i32* %a, align 4
-  br label %if.end
-
-if.end:
-  %m.0 = phi i32 [ 13, %if.then ], [ 10, %entry ]
-  store i32 %m.0, i32* %a, align 4
-  ret void
-}
diff --git a/llvm/test/Transforms/DeadStoreElimination/ifthenelse.ll b/llvm/test/Transforms/DeadStoreElimination/ifthenelse.ll
deleted file mode 100644
index 59ef17e37a5..00000000000
--- a/llvm/test/Transforms/DeadStoreElimination/ifthenelse.ll
+++ /dev/null
@@ -1,27 +0,0 @@
-; RUN: opt < %s -basicaa -dse -enable-nonlocal-dse -S | FileCheck %s
-
-; The add and store in entry block should be removed by non-local DSE.
-; CHECK-NOT: %stval = add
-; CHECK-NOT: store i32 %stval
-;
-define void @foo(i32* noalias nocapture %a, i32* noalias nocapture readonly %b, i32 %c) {
-entry:
-  %0 = load i32, i32* %b, align 4
-  %stval = add nsw i32 %0, 1
-  store i32 %stval, i32* %a, align 4
-  %cmp = icmp sgt i32 %c, 0
-  br i1 %cmp, label %if.then, label %if.else
-
-if.then:
-  %1 = add nsw i32 %c, 10
-  br label %if.end
-
-if.else:
-  %2 = add nsw i32 %c, 13
-  br label %if.end
-
-if.end:
-  %3 = phi i32 [ %1, %if.then ], [ %2, %if.else ]
-  store i32 %3, i32* %a, align 4
-  ret void
-}
diff --git a/llvm/test/Transforms/DeadStoreElimination/ifthenelse2.ll b/llvm/test/Transforms/DeadStoreElimination/ifthenelse2.ll
deleted file mode 100644
index 7aab0300477..00000000000
--- a/llvm/test/Transforms/DeadStoreElimination/ifthenelse2.ll
+++ /dev/null
@@ -1,34 +0,0 @@
-; RUN: opt < %s -basicaa -dse -enable-nonlocal-dse -S | FileCheck %s
-
-; The add and store in entry block should be removed by non-local DSE.
-; CHECK-NOT: %stval = add
-; CHECK-NOT: store i32 %stval
-;
-; The stores in if.then and if.else blocks should be removed by non-local DSE.
-; CHECK-NOT: store i32 %1
-; CHECK-NOT: store i32 %2
-;
-define void @foo(i32* noalias nocapture %a, i32* noalias nocapture readonly %b, i32 %c) {
-entry:
-  %0 = load i32, i32* %b, align 4
-  %stval = add nsw i32 %0, 1
-  store i32 %stval, i32* %a, align 4
-  %cmp = icmp sgt i32 %c, 0
-  br i1 %cmp, label %if.then, label %if.else
-
-if.then:
-  %1 = add nsw i32 %c, 10
-  store i32 %1, i32* %a, align 4
-  br label %if.end
-
-if.else:
-  %2 = add nsw i32 %c, 13
-  store i32 %2, i32* %a, align 4
-  br label %if.end
-
-if.end:
-  %3 = phi i32 [ %1, %if.then ], [ %2, %if.else ]
-  %4 = sub nsw i32 %3, 6
-  store i32 %4, i32* %a, align 4
-  ret void
-}
diff --git a/llvm/test/Transforms/DeadStoreElimination/loop.ll b/llvm/test/Transforms/DeadStoreElimination/loop.ll
deleted file mode 100644
index 941e6fafaf3..00000000000
--- a/llvm/test/Transforms/DeadStoreElimination/loop.ll
+++ /dev/null
@@ -1,42 +0,0 @@
-; RUN: opt < %s -basicaa -dse -enable-nonlocal-dse -S | FileCheck %s
-
-; The store in for.body block should be removed by non-local DSE.
-; CHECK-NOT: store i32 0, i32* %arrayidx
-;
-define void @sum(i32 %N, i32* noalias nocapture %C, i32* noalias nocapture readonly %A, i32* noalias nocapture readonly %B) {
-entry:
-  %cmp24 = icmp eq i32 %N, 0
-  br i1 %cmp24, label %for.end11, label %for.body
-
-for.body:
-  %i.025 = phi i32 [ %inc10, %for.cond1.for.inc9_crit_edge ], [ 0, %entry ]
-  %arrayidx = getelementptr inbounds i32, i32* %C, i32 %i.025
-  store i32 0, i32* %arrayidx, align 4
-  %mul = mul i32 %i.025, %N
-  %arrayidx4.gep = getelementptr i32, i32* %A, i32 %mul
-  br label %for.body3
-
-for.body3:
-  %0 = phi i32 [ 0, %for.body ], [ %add8, %for.body3 ]
-  %arrayidx4.phi = phi i32* [ %arrayidx4.gep, %for.body ], [ %arrayidx4.inc, %for.body3 ]
-  %arrayidx5.phi = phi i32* [ %B, %for.body ], [ %arrayidx5.inc, %for.body3 ]
-  %j.023 = phi i32 [ 0, %for.body ], [ %inc, %for.body3 ]
-  %1 = load i32, i32* %arrayidx4.phi, align 4
-  %2 = load i32, i32* %arrayidx5.phi, align 4
-  %add6 = add nsw i32 %2, %1
-  %add8 = add nsw i32 %add6, %0
-  %inc = add i32 %j.023, 1
-  %exitcond = icmp ne i32 %inc, %N
-  %arrayidx4.inc = getelementptr i32, i32* %arrayidx4.phi, i32 1
-  %arrayidx5.inc = getelementptr i32, i32* %arrayidx5.phi, i32 1
-  br i1 %exitcond, label %for.body3, label %for.cond1.for.inc9_crit_edge
-
-for.cond1.for.inc9_crit_edge:
-  store i32 %add8, i32* %arrayidx, align 4
-  %inc10 = add i32 %i.025, 1
-  %exitcond26 = icmp ne i32 %inc10, %N
-  br i1 %exitcond26, label %for.body, label %for.end11
-
-for.end11:
-  ret void
-}