Imported Upstream version 5.18.0.205

Former-commit-id: 7f59f7e792705db773f1caecdaa823092f4e2927

external/llvm/test/Transforms/FunctionImport/adjustable_threshold.ll

@@ -0,0 +1,31 @@
+; Do setup work for all below tests: generate bitcode and combined index
+; RUN: opt -module-summary %s -o %t.bc
+; RUN: opt -module-summary %p/Inputs/adjustable_threshold.ll -o %t2.bc
+; RUN: llvm-lto -thinlto -o %t3 %t.bc %t2.bc
+
+; Test import with default progressive instruction factor
+; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=10 -S | FileCheck %s --check-prefix=CHECK --check-prefix=INSTLIM-DEFAULT
+; INSTLIM-DEFAULT: call void @staticfunc2.llvm.
+
+; Test import with a reduced progressive instruction factor
+; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=10 -import-instr-evolution-factor=0.5 -S | FileCheck %s --check-prefix=CHECK --check-prefix=INSTLIM-PROGRESSIVE
+; INSTLIM-PROGRESSIVE-NOT: call void @staticfunc
+
+
+
+declare void @globalfunc1()
+declare void @globalfunc2()
+
+define void @entry() {
+entry:
+; Call site are processed in reversed order!
+
+; On the direct call, we reconsider @largefunction with a higher threshold and
+; import it
+  call void @globalfunc2()
+; When importing globalfunc1, the threshold was limited and @largefunction was
+; not imported.
+  call void @globalfunc1()
+  ret void
+}
+