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-rw-r--r--llvm/test/ThinLTO/X86/empty_module_with_cache.ll35
1 files changed, 35 insertions, 0 deletions
diff --git a/llvm/test/ThinLTO/X86/empty_module_with_cache.ll b/llvm/test/ThinLTO/X86/empty_module_with_cache.ll
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+++ b/llvm/test/ThinLTO/X86/empty_module_with_cache.ll
@@ -0,0 +1,35 @@
+; RUN: opt -module-hash -module-summary %s -o %t.bc
+; RUN: opt -module-hash -module-summary %p/Inputs/empty_module_with_cache.ll -o %t2.bc
+
+; Verify that enabling caching is working, even if the module is empty
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; RUN: llvm-lto -thinlto-action=run %t2.bc %t.bc -exported-symbol=main -thinlto-cache-dir %t.cache
+; RUN: ls %t.cache/llvmcache.timestamp
+; RUN: ls %t.cache | count 3
+
+; Verify that enabling caching is working with llvm-lto2
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; RUN: llvm-lto2 -o %t.o %t2.bc %t.bc -cache-dir %t.cache \
+; RUN: -r=%t2.bc,_main,plx
+; RUN: ls %t.cache | count 2
+
+; Same, but without hash, the index will be empty and caching should not happen
+
+; RUN: opt -module-summary %s -o %t.bc
+; RUN: opt -module-summary %p/Inputs/empty_module_with_cache.ll -o %t2.bc
+
+; Verify that caching is disabled for module without hash
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; RUN: llvm-lto -thinlto-action=run %t2.bc %t.bc -exported-symbol=main -thinlto-cache-dir %t.cache
+; RUN: ls %t.cache/llvmcache.timestamp
+; RUN: ls %t.cache | count 2
+
+; Verify that caching is disabled for module without hash, with llvm-lto2
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; RUN: llvm-lto2 -o %t.o %t2.bc %t.bc -cache-dir %t.cache \
+; RUN: -r=%t2.bc,_main,plx
+; RUN: ls %t.cache | count 1
+
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.11.0"
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