Imported Upstream version 5.18.0.179

Former-commit-id: 67aa10e65b237e1c4537630979ee99ebe1374215

external/llvm/test/Transforms/CallSiteSplitting/callsite-no-splitting.ll

@@ -0,0 +1,42 @@
+; RUN: opt < %s -callsite-splitting -S | FileCheck %s
+; RUN: opt < %s  -passes='function(callsite-splitting)' -S | FileCheck %s
+
+define i32 @callee(i32*, i32, i32) {
+  ret i32 10
+}
+
+; CHECK-LABEL: @test_preds_equal
+; CHECK-NOT: split
+; CHECK: br i1 %cmp, label %Tail, label %Tail
+define i32 @test_preds_equal(i32* %a, i32 %v, i32 %p) {
+TBB:
+  %cmp = icmp eq i32* %a, null
+  br i1 %cmp, label %Tail, label %Tail
+Tail:
+  %r = call i32 @callee(i32* %a, i32 %v, i32 %p)
+  ret i32 %r
+}
+
+define void @fn1(i16 %p1) {
+entry:
+  ret void
+}
+
+define void @fn2() {
+  ret void
+
+; Unreachable code below
+
+for.inc:                                          ; preds = %for.inc
+  br i1 undef, label %for.end6, label %for.inc
+
+for.end6:                                         ; preds = %for.inc
+  br i1 undef, label %lor.rhs, label %lor.end
+
+lor.rhs:                                          ; preds = %for.end6
+  br label %lor.end
+
+lor.end:                                          ; preds = %for.end6, %lor.rhs
+  call void @fn1(i16 0)
+  ret void
+}