Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/CodeGen/ARM/tail-opts.ll

@@ -1,119 +0,0 @@
-; RUN: llc < %s -mtriple=arm-apple-darwin -relocation-model=dynamic-no-pic -mcpu=cortex-a8 -asm-verbose=false | FileCheck %s
-
-declare void @bar(i32)
-declare void @car(i32)
-declare void @dar(i32)
-declare void @ear(i32)
-declare void @far(i32)
-declare i1 @qux()
-
-@GHJK = global i32 0
-
-declare i8* @choose(i8*, i8*)
-
-; BranchFolding should tail-duplicate the indirect jump to avoid
-; redundant branching.
-
-; CHECK-LABEL: tail_duplicate_me:
-; CHECK:      qux
-; CHECK:      movw r{{[0-9]+}}, :lower16:_GHJK
-; CHECK:      movt r{{[0-9]+}}, :upper16:_GHJK
-; CHECK:      str r
-; CHECK-NEXT: bx r
-; CHECK:      qux
-; CHECK:      movw r{{[0-9]+}}, :lower16:_GHJK
-; CHECK:      movt r{{[0-9]+}}, :upper16:_GHJK
-; CHECK:      str r
-; CHECK-NEXT: bx r
-; CHECK:      movw r{{[0-9]+}}, :lower16:_GHJK
-; CHECK:      movt r{{[0-9]+}}, :upper16:_GHJK
-; CHECK:      str r
-; CHECK-NEXT: bx r
-
-define void @tail_duplicate_me() nounwind {
-entry:
-  %a = call i1 @qux()
-  %c = call i8* @choose(i8* blockaddress(@tail_duplicate_me, %return),
-                        i8* blockaddress(@tail_duplicate_me, %altret))
-  br i1 %a, label %A, label %next
-next:
-  %b = call i1 @qux()
-  br i1 %b, label %B, label %C
-
-A:
-  call void @bar(i32 0)
-  store i32 0, i32* @GHJK
-  br label %M
-
-B:
-  call void @car(i32 1)
-  store i32 0, i32* @GHJK
-  br label %M
-
-C:
-  call void @dar(i32 2)
-  store i32 0, i32* @GHJK
-  br label %M
-
-M:
-  indirectbr i8* %c, [label %return, label %altret]
-
-return:
-  call void @ear(i32 1000)
-  ret void
-altret:
-  call void @far(i32 1001)
-  ret void
-}
-
-; Use alternating abort functions so that the blocks we wish to merge are not
-; layout successors during branch folding.
-
-; CHECK-LABEL: merge_alternating_aborts:
-; CHECK-NOT: _abort
-; CHECK-NOT: _alt_abort
-; CHECK: bxne lr
-; CHECK-NOT: _abort
-; CHECK-NOT: _alt_abort
-; CHECK: LBB{{.*}}:
-; CHECK: mov lr, pc
-; CHECK: b _alt_abort
-; CHECK-NOT: _abort
-; CHECK-NOT: _alt_abort
-; CHECK: LBB{{.*}}:
-; CHECK: mov lr, pc
-; CHECK: b _abort
-; CHECK-NOT: _abort
-; CHECK-NOT: _alt_abort
-
-declare void @abort()
-declare void @alt_abort()
-
-define void @merge_alternating_aborts() {
-entry:
-  %c1 = call i1 @qux()
-  br i1 %c1, label %cont1, label %abort1
-abort1:
-  call void @abort()
-  unreachable
-cont1:
-  %c2 = call i1 @qux()
-  br i1 %c2, label %cont2, label %abort2
-abort2:
-  call void @alt_abort()
-  unreachable
-cont2:
-  %c3 = call i1 @qux()
-  br i1 %c3, label %cont3, label %abort3
-abort3:
-  call void @abort()
-  unreachable
-cont3:
-  %c4 = call i1 @qux()
-  br i1 %c4, label %cont4, label %abort4
-abort4:
-  call void @alt_abort()
-  unreachable
-cont4:
-  ret void
-}