Imported Upstream version 5.18.0.179

Former-commit-id: 67aa10e65b237e1c4537630979ee99ebe1374215

external/llvm/test/CodeGen/SystemZ/branch-08.ll

@@ -0,0 +1,46 @@
+; Test SystemZInstrInfo::AnalyzeBranch and SystemZInstrInfo::InsertBranch.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+declare void @foo() noreturn
+
+; Check a case where a separate branch is needed and where the original
+; order should be reversed.
+define i32 @f1(i32 %a, i32 *%bptr) {
+; CHECK-LABEL: f1:
+; CHECK: cl %r2, 0(%r3)
+; CHECK: jl .L[[LABEL:.*]]
+; CHECK: br %r14
+; CHECK: .L[[LABEL]]:
+; CHECK: brasl %r14, foo@PLT
+entry:
+  %b = load i32 , i32 *%bptr
+  %cmp = icmp ult i32 %a, %b
+  br i1 %cmp, label %callit, label %return
+
+callit:
+  call void @foo()
+  unreachable
+
+return:
+  ret i32 1
+}
+
+; Same again with a fused compare and branch.
+define i32 @f2(i32 %a) {
+; CHECK-LABEL: f2:
+; CHECK: cije %r2, 0, .L[[LABEL:.*]]
+; CHECK: br %r14
+; CHECK: .L[[LABEL]]:
+; CHECK: brasl %r14, foo@PLT
+entry:
+  %cmp = icmp eq i32 %a, 0
+  br i1 %cmp, label %callit, label %return
+
+callit:
+  call void @foo()
+  unreachable
+
+return:
+  ret i32 1
+}