Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/CodeGen/SystemZ/backchain.ll

@@ -1,84 +0,0 @@
-; Test the backchain attribute.
-;
-; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
-
-declare i8 *@llvm.stacksave()
-declare void @llvm.stackrestore(i8 *)
-declare void @g()
-
-; nothing should happen if no stack frame is needed.
-define void @f1() "backchain" {
-; CHECK-LABEL: f1:
-; CHECK-NOT: stg
-  ret void
-}
-
-; check that backchain is saved if we call someone
-define void @f2() "backchain" {
-; CHECK-LABEL: f2:
-; CHECK: stmg %r14, %r15, 112(%r15)
-; CHECK: lgr %r1, %r15
-; CHECK: aghi %r15, -160
-; CHECK: stg %r1, 0(%r15)
-  call void @g()
-  call void @g()
-  ret void
-}
-
-; check that backchain is saved if we have an alloca
-define void @f3() "backchain" {
-; CHECK-LABEL: f3:
-; CHECK-NOT: stmg
-; CHECK: lgr %r1, %r15
-; CHECK: aghi %r15, -168
-; CHECK: stg %r1, 0(%r15)
-  %ign = alloca i8, i32 4
-  ret void
-}
-
-; check that alloca copies the backchain
-define void @f4(i32 %len) "backchain" {
-; CHECK-LABEL: f4:
-; CHECK: stmg %r11, %r15, 88(%r15)
-; CHECK: lgr %r1, %r15
-; CHECK: aghi %r15, -160
-; CHECK: stg %r1, 0(%r15)
-; CHECK: lgr %r11, %r15
-; CHECK-DAG: lg [[BC:%r[0-9]+]], 0(%r15)
-; CHECK-DAG: lgr [[NEWSP:%r[0-9]+]], %r15
-; CHECK: lgr %r15, [[NEWSP]]
-; CHECK: stg [[BC]], 0([[NEWSP]])
-  %ign = alloca i8, i32 %len
-  ret void
-}
-
-; check that llvm.stackrestore restores the backchain
-define void @f5(i32 %count1, i32 %count2) "backchain" {
-; CHECK-LABEL: f5:
-; CHECK: stmg %r11, %r15, 88(%r15)
-; CHECK: lgr %r1, %r15
-; CHECK: aghi %r15, -160
-; CHECK: stg %r1, 0(%r15)
-; CHECK: lgr %r11, %r15
-; CHECK-DAG: lgr [[SAVESP:%r[0-9]+]], %r15
-; CHECK-DAG: lg [[BC:%r[0-9]+]], 0(%r15)
-; CHECK-DAG: lgr [[NEWSP:%r[0-9]+]], %r15
-; CHECK-DAG: lgr %r15, [[NEWSP]]
-; CHECK-DAG: stg [[BC]], 0([[NEWSP]])
-; CHECK-DAG: lg [[BC2:%r[0-9]+]], 0(%r15)
-; CHECK-DAG: lgr %r15, [[SAVESP]]
-; CHECK-DAG: stg [[BC2]], 0([[SAVESP]])
-; CHECK-DAG: lg [[BC3:%r[0-9]+]], 0(%r15)
-; CHECK-DAG: lgr [[NEWSP2:%r[0-9]+]], %r15
-; CHECK-DAG: lgr %r15, [[NEWSP2]]
-; CHECK-DAG: stg [[BC3]], 0([[NEWSP2]])
-; CHECK: lmg %r11, %r15, 248(%r11)
-; CHECK: br %r14
-  %src = call i8 *@llvm.stacksave()
-  %array1 = alloca i8, i32 %count1
-  store volatile i8 0, i8 *%array1
-  call void @llvm.stackrestore(i8 *%src)
-  %array2 = alloca i8, i32 %count2
-  store volatile i8 0, i8 *%array2
-  ret void
-}