Imported Upstream version 5.18.0.207

Former-commit-id: 3b152f462918d427ce18620a2cbe4f8b79650449

external/llvm/test/CodeGen/ARM/optimize-dmbs-v7.ll

@@ -1,74 +0,0 @@
-; RUN: llc -O1 < %s -mtriple=armv7 -mattr=+db | FileCheck %s
-
-@x1 = global i32 0, align 4
-@x2 = global i32 0, align 4
-
-define void @test() {
-entry:
-  br label %for.body
-
-for.body:                                         ; preds = %for.body, %entry
-  %i.013 = phi i32 [ 1, %entry ], [ %inc6, %for.body ]
-  store atomic i32 %i.013, i32* @x1 seq_cst, align 4
-  store atomic i32 %i.013, i32* @x1 seq_cst, align 4
-  store atomic i32 %i.013, i32* @x2 seq_cst, align 4
-  %inc6 = add nsw i32 %i.013, 1
-  %exitcond = icmp eq i32 %inc6, 2
-  br i1 %exitcond, label %for.end, label %for.body
-
-for.end:                                          ; preds = %for.body
-  ret void
-
-; The for.body contains 3 seq_cst stores.
-; Hence it should have 3 dmb;str;dmb sequences with the middle dmbs collapsed
-; CHECK: %for.body
-; CHECK-NOT: str
-; CHECK: dmb
-; CHECK-NOT: dmb
-; CHECK: str
-
-; CHECK-NOT: str
-; CHECK: dmb
-; CHECK-NOT: dmb
-; CHECK: str
-
-; CHECK-NOT: str
-; CHECK: dmb
-; CHECK-NOT: dmb
-; CHECK: str
-
-; CHECK-NOT: str
-; CHECK: dmb
-; CHECK-NOT: dmb
-; CHECK-NOT: str
-; CHECK: %for.end
-}
-
-define void @test2() {
-  call void @llvm.arm.dmb(i32 11)
-  tail call void @test()
-  call void @llvm.arm.dmb(i32 11)
-  ret void
-; the call should prevent the two dmbs from collapsing
-; CHECK: test2:
-; CHECK: dmb
-; CHECK-NEXT: bl
-; CHECK-NEXT: dmb
-}
-
-define void @test3() {
-  call void @llvm.arm.dmb(i32 11)
-  call void @llvm.arm.dsb(i32 9)
-  call void @llvm.arm.dmb(i32 11)
-  ret void
-; the call should prevent the two dmbs from collapsing
-; CHECK: test3:
-; CHECK: dmb
-; CHECK-NEXT: dsb
-; CHECK-NEXT: dmb
-
-}
-
-
-declare void @llvm.arm.dmb(i32)
-declare void @llvm.arm.dsb(i32)