[AsmPrinter][TLOF] Reintroduce AArch64 test

Follow up from r231505.

Fix the non-determinism by using a MapVector and reintroduce the AArch64
testcase. Defer deleting the got candidates up to the end and remove
them in a bulk, avoiding linear time removal of each element.

Thanks to Renato Golin for trying it out on other platforms.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231830 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 92 insertions, 0 deletions

diff --git a/test/MC/MachO/AArch64/cstexpr-gotpcrel.ll b/test/MC/MachO/AArch64/cstexpr-gotpcrel.ll
new file mode 100644
index 00000000000..3169dac7a3f
--- /dev/null
+++ b/test/MC/MachO/AArch64/cstexpr-gotpcrel.ll
@@ -0,0 +1,92 @@
+; RUN: llc -mtriple=arm64-apple-darwin %s -o - | FileCheck %s
+
+; GOT equivalent globals references can be replaced by the GOT entry of the
+; final symbol instead.
+
+%struct.data = type { i32, %struct.anon }
+%struct.anon = type { i32, i32 }
+
+@localfoo = global i32 42
+@localgotequiv = private unnamed_addr constant i32* @localfoo
+
+@extfoo = external global i32
+@extgotequiv = private unnamed_addr constant i32* @extfoo
+
+; Don't replace GOT equivalent usage within instructions and emit the GOT
+; equivalent since it can't be replaced by the GOT entry. @bargotequiv is
+; used by an instruction inside @t0.
+;
+; CHECK: l_bargotequiv:
+; CHECK-NEXT:  .quad   _extbar
+@extbar = external global i32
+@bargotequiv = private unnamed_addr constant i32* @extbar
+
+@table = global [4 x %struct.data] [
+; CHECK-LABEL: _table
+  %struct.data { i32 1, %struct.anon { i32 2, i32 3 } },
+; Test GOT equivalent usage inside nested constant arrays.
+
+; CHECK: .long   5
+; CHECK-NOT: .long   _localgotequiv-(_table+20)
+; CHECK-NEXT: Ltmp1:
+; CHECK-NEXT: .long _localfoo@GOT-Ltmp1
+  %struct.data { i32 4, %struct.anon { i32 5,
+    i32 trunc (i64 sub (i64 ptrtoint (i32** @localgotequiv to i64),
+                        i64 ptrtoint (i32* getelementptr inbounds ([4 x %struct.data]* @table, i32 0, i64 1, i32 1, i32 1) to i64))
+                        to i32)}
+  },
+
+; CHECK: .long   5
+; CHECK-NOT: _extgotequiv-(_table+32)
+; CHECK-NEXT: Ltmp2:
+; CHECK-NEXT: _extfoo@GOT-Ltmp2
+  %struct.data { i32 4, %struct.anon { i32 5,
+    i32 trunc (i64 sub (i64 ptrtoint (i32** @extgotequiv to i64),
+                        i64 ptrtoint (i32* getelementptr inbounds ([4 x %struct.data]* @table, i32 0, i64 2, i32 1, i32 1) to i64))
+                        to i32)}
+  },
+; Test support for arbitrary constants into the GOTPCREL offset, which is
+; supported on x86-64 but not on ARM64
+
+; CHECK: .long   5
+; CHECK-NEXT: .long (l_extgotequiv-(_table+44))+24
+  %struct.data { i32 4, %struct.anon { i32 5,
+    i32 add (i32 trunc (i64 sub (i64 ptrtoint (i32** @extgotequiv to i64),
+                                 i64 ptrtoint (i32* getelementptr inbounds ([4 x %struct.data]* @table, i32 0, i64 3, i32 1, i32 1) to i64))
+                                 to i32), i32 24)}
+  }
+], align 16
+
+; Test multiple uses of GOT equivalents.
+
+; CHECK-LABEL: _delta
+; CHECK: Ltmp3:
+; CHECK-NEXT:  .long _extfoo@GOT-Ltmp3
+@delta = global i32 trunc (i64 sub (i64 ptrtoint (i32** @extgotequiv to i64),
+                                    i64 ptrtoint (i32* @delta to i64))
+                           to i32)
+
+; CHECK-LABEL: _deltaplus:
+; CHECK: .long  (l_localgotequiv-_deltaplus)+55
+@deltaplus = global i32 add (i32 trunc (i64 sub (i64 ptrtoint (i32** @localgotequiv to i64),
+                                        i64 ptrtoint (i32* @deltaplus to i64))
+                                        to i32), i32 55)
+
+define i32 @t0(i32 %a) {
+  %x = add i32 trunc (i64 sub (i64 ptrtoint (i32** @bargotequiv to i64),
+                               i64 ptrtoint (i32 (i32)* @t0 to i64))
+                           to i32), %a
+  ret i32 %x
+}
+
+; Check that these got equivalent symbols are emitted on ARM64. Since ARM64
+; does not support encoding an extra offset with @GOT, we still need to emit the
+; equivalents for use by such IR constructs. Check them at the end of the test
+; since they will start out as GOT equivalent candidates, but they are actually
+; needed and are therefore emitted at the end.
+
+; CHECK-LABEL: l_localgotequiv:
+; CHECK-NEXT: .quad   _localfoo
+
+; CHECK-LABEL: l_extgotequiv:
+; CHECK-NEXT: .quad   _extfoo