Revert "Peephole optimization in switch table lookup: reuse the guarding table comparison if possible."

It is breaking the clang bootstrag.

llvm-svn: 222877

1 files changed, 0 insertions, 94 deletions

diff --git a/llvm/test/Transforms/SimplifyCFG/X86/switch_to_lookup_table.ll b/llvm/test/Transforms/SimplifyCFG/X86/switch_to_lookup_table.ll
index 547403b97e8..5d9ecbf7077 100644
--- a/llvm/test/Transforms/SimplifyCFG/X86/switch_to_lookup_table.ll
+++ b/llvm/test/Transforms/SimplifyCFG/X86/switch_to_lookup_table.ll
@@ -1077,97 +1077,3 @@ return:
 ; CHECK-NEXT: ret i8 %switch.idx.cast
 }
 
-; Reuse the inverted table range compare.
-define i32 @reuse_cmp1(i32 %x) {
-entry:
-  switch i32 %x, label %sw.default [
-    i32 0, label %sw.bb
-    i32 1, label %sw.bb1
-    i32 2, label %sw.bb2
-    i32 3, label %sw.bb3
-  ]
-sw.bb: br label %sw.epilog
-sw.bb1: br label %sw.epilog
-sw.bb2: br label %sw.epilog
-sw.bb3: br label %sw.epilog
-sw.default: br label %sw.epilog
-sw.epilog:
-  %r.0 = phi i32 [ 0, %sw.default ], [ 13, %sw.bb3 ], [ 12, %sw.bb2 ], [ 11, %sw.bb1 ], [ 10, %sw.bb ]
-  %cmp = icmp eq i32 %r.0, 0       ; This compare can be "replaced".
-  br i1 %cmp, label %if.then, label %if.end
-if.then: br label %return
-if.end: br label %return
-return:
-  %retval.0 = phi i32 [ 100, %if.then ], [ %r.0, %if.end ]
-  ret i32 %retval.0
-; CHECK-LABEL: @reuse_cmp1(
-; CHECK: entry:
-; CHECK-NEXT: %switch.tableidx = sub i32 %x, 0
-; CHECK-NEXT: [[C:%.+]] = icmp ult i32 %switch.tableidx, 4
-; CHECK-NEXT: %inverted.cmp = xor i1 [[C]], true
-; CHECK:      [[R:%.+]] = select i1 %inverted.cmp, i32 100, i32 {{.*}}
-; CHECK-NEXT: ret i32 [[R]]
-}
-
-; Reuse the table range compare.
-define i32 @reuse_cmp2(i32 %x) {
-entry:
-  switch i32 %x, label %sw.default [
-    i32 0, label %sw.bb
-    i32 1, label %sw.bb1
-    i32 2, label %sw.bb2
-    i32 3, label %sw.bb3
-  ]
-sw.bb: br label %sw.epilog
-sw.bb1: br label %sw.epilog
-sw.bb2: br label %sw.epilog
-sw.bb3: br label %sw.epilog
-sw.default: br label %sw.epilog
-sw.epilog:
-  %r.0 = phi i32 [ 4, %sw.default ], [ 3, %sw.bb3 ], [ 2, %sw.bb2 ], [ 1, %sw.bb1 ], [ 0, %sw.bb ]
-  %cmp = icmp ne i32 %r.0, 4       ; This compare can be "replaced".
-  br i1 %cmp, label %if.then, label %if.end
-if.then: br label %return
-if.end: br label %return
-return:
-  %retval.0 = phi i32 [ %r.0, %if.then ], [ 100, %if.end ]
-  ret i32 %retval.0
-; CHECK-LABEL: @reuse_cmp2(
-; CHECK: entry:
-; CHECK-NEXT: %switch.tableidx = sub i32 %x, 0
-; CHECK-NEXT: [[C:%.+]] = icmp ult i32 %switch.tableidx, 4
-; CHECK:      [[R:%.+]] = select i1 [[C]], i32 {{.*}}, i32 100
-; CHECK-NEXT: ret i32 [[R]]
-}
-
-; Cannot reuse the table range compare, because the default value is the same
-; as one of the case values.
-define i32 @no_reuse_cmp(i32 %x) {
-entry:
-  switch i32 %x, label %sw.default [
-    i32 0, label %sw.bb
-    i32 1, label %sw.bb1
-    i32 2, label %sw.bb2
-    i32 3, label %sw.bb3
-  ]
-sw.bb: br label %sw.epilog
-sw.bb1: br label %sw.epilog
-sw.bb2: br label %sw.epilog
-sw.bb3: br label %sw.epilog
-sw.default: br label %sw.epilog
-sw.epilog:
-  %r.0 = phi i32 [ 12, %sw.default ], [ 13, %sw.bb3 ], [ 12, %sw.bb2 ], [ 11, %sw.bb1 ], [ 10, %sw.bb ]
-  %cmp = icmp ne i32 %r.0, 0
-  br i1 %cmp, label %if.then, label %if.end
-if.then: br label %return
-if.end: br label %return
-return:
-  %retval.0 = phi i32 [ %r.0, %if.then ], [ 100, %if.end ]
-  ret i32 %retval.0
-; CHECK-LABEL: @no_reuse_cmp(
-; CHECK:  [[S:%.+]] = select 
-; CHECK-NEXT:  %cmp = icmp ne i32 [[S]], 0
-; CHECK-NEXT:  [[R:%.+]] = select i1 %cmp, i32 [[S]], i32 100
-; CHECK-NEXT:  ret i32 [[R]]
-}
-