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| author | Teresa Johnson <tejohnson@google.com> | 2018-04-01 15:54:40 +0000 |
|---|---|---|
| committer | Teresa Johnson <tejohnson@google.com> | 2018-04-01 15:54:40 +0000 |
| commit | 974706ebf76100f0cccf680bf4a4ad9649e39e94 (patch) | |
| tree | 95934117d7910415e1159ae711a3bc997d76396d /llvm/test/Transforms/FunctionImport/funcimport_cutoff.ll | |
| parent | f80ebc8d214115c1887854aa37965fb799c8b6ef (diff) | |
| download | bcm5719-llvm-974706ebf76100f0cccf680bf4a4ad9649e39e94.tar.gz bcm5719-llvm-974706ebf76100f0cccf680bf4a4ad9649e39e94.zip | |
[ThinLTO] Add an import cutoff for debugging/triaging
Summary:
Adds -import-cutoff=N which will stop importing during the thin link
after N imports. Default is -1 (no limit).
Reviewers: wmi
Subscribers: inglorion, llvm-commits
Differential Revision: https://reviews.llvm.org/D45127
llvm-svn: 328934
Diffstat (limited to 'llvm/test/Transforms/FunctionImport/funcimport_cutoff.ll')
| -rw-r--r-- | llvm/test/Transforms/FunctionImport/funcimport_cutoff.ll | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/llvm/test/Transforms/FunctionImport/funcimport_cutoff.ll b/llvm/test/Transforms/FunctionImport/funcimport_cutoff.ll new file mode 100644 index 00000000000..dac4bd14faa --- /dev/null +++ b/llvm/test/Transforms/FunctionImport/funcimport_cutoff.ll @@ -0,0 +1,49 @@ +; Test to ensure that thin linking with -import-cutoff stops importing when +; expected. + +; "-stats" and "-debug-only" require +Asserts. +; REQUIRES: asserts + +; RUN: opt -module-summary %s -o %t.bc +; RUN: opt -module-summary %p/Inputs/funcimport_cutoff.ll -o %t2.bc +; RUN: llvm-lto -thinlto -o %t3 %t.bc %t2.bc + +; First do with default options, which should import both foo and bar +; RUN: opt -function-import -stats -print-imports -summary-file %t3.thinlto.bc %t.bc -S 2>&1 | FileCheck %s --check-prefix=IMPORT + +; Next try to restrict to 1 import. This should import just foo. +; RUN: opt -import-cutoff=1 -function-import -stats -print-imports -summary-file %t3.thinlto.bc %t.bc -S 2>&1 | FileCheck %s --check-prefix=IMPORT1 + +; Next try to restrict to 0 imports. This should not import. +; RUN: opt -import-cutoff=0 -function-import -stats -print-imports -summary-file %t3.thinlto.bc %t.bc -S 2>&1 | FileCheck %s --check-prefix=NOIMPORT + +define i32 @main() { +entry: + call void @foo() + call void @bar() + ret i32 0 +} + +declare void @foo() +declare void @bar() + +; Check -print-imports output +; IMPORT: Import foo +; IMPORT: Import bar +; IMPORT1: Import foo +; IMPORT1-NOT: Import bar +; NOIMPORT-NOT: Import foo +; NOIMPORT-NOT: Import bar + +; Check -S output +; IMPORT-DAG: define available_externally void @foo() +; IMPORT-DAG: define available_externally void @bar() +; NOIMPORT-DAG: declare void @foo() +; NOIMPORT-DAG: declare void @bar() +; IMPORT1-DAG: define available_externally void @foo() +; IMPORT1-DAG: declare void @bar() + +; Check -stats output +; IMPORT: 2 function-import - Number of functions imported +; IMPORT1: 1 function-import - Number of functions imported +; NOIMPORT-NOT: function-import - Number of functions imported |
