--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/llvm/test/ThinLTO/X86/cache.ll	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,169 @@
+; NetBSD: noatime mounts currently inhibit 'touch -a' updates
+; UNSUPPORTED: system-netbsd
+
+; Verify first that *without* hash, we don't use the cache.
+; RUN: opt -module-summary %s -o %t.bc
+; RUN: opt -module-summary %p/Inputs/cache.ll -o %t2.bc
+
+; Verify that enabling caching is ignoring module without hash
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; RUN: llvm-lto -thinlto-action=run -exported-symbol=globalfunc %t2.bc %t.bc -thinlto-cache-dir %t.cache
+; RUN: ls %t.cache/llvmcache.timestamp
+; RUN: ls %t.cache | count 1
+
+; Verify that enabling caching is ignoring module without hash with llvm-lto2
+; RUN: rm -Rf %t.cache
+; RUN: llvm-lto2 run -o %t.o %t2.bc  %t.bc -cache-dir %t.cache \
+; RUN:  -r=%t2.bc,_main,plx \
+; RUN:  -r=%t2.bc,_globalfunc,lx \
+; RUN:  -r=%t.bc,_globalfunc,plx
+; RUN: ls %t.cache | count 0
+
+
+; Repeat again, *with* hash this time.
+
+; RUN: opt -module-hash -module-summary %s -o %t.bc
+; RUN: opt -module-hash -module-summary %p/Inputs/cache.ll -o %t2.bc
+
+; Verify that enabling caching is working, and that the pruner only removes
+; files matching the pattern "llvmcache-*".
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; RUN: touch -t 197001011200 %t.cache/llvmcache-foo %t.cache/foo
+; RUN: llvm-lto -thinlto-action=run -exported-symbol=globalfunc %t2.bc %t.bc -thinlto-cache-dir %t.cache
+; RUN: ls %t.cache | count 4
+; RUN: ls %t.cache/llvmcache.timestamp
+; RUN: ls %t.cache/foo
+; RUN: not ls %t.cache/llvmcache-foo
+; RUN: ls %t.cache/llvmcache-* | count 2
+
+; Verify that enabling caching is working with llvm-lto2
+; RUN: rm -Rf %t.cache
+; RUN: llvm-lto2 run -o %t.o %t2.bc %t.bc -cache-dir %t.cache \
+; RUN:  -r=%t2.bc,_main,plx \
+; RUN:  -r=%t2.bc,_globalfunc,lx \
+; RUN:  -r=%t.bc,_globalfunc,plx
+; RUN: ls %t.cache | count 2
+; RUN: ls %t.cache/llvmcache-* | count 2
+
+; Verify that caches with a timestamp older than the pruning interval
+; will be pruned
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; RUN: touch -t 197001011200 %t.cache/llvmcache-foo
+; RUN: touch -t 197001011200 %t.cache/llvmcache.timestamp
+; RUN: llvm-lto -thinlto-action=run -exported-symbol=globalfunc %t2.bc %t.bc -thinlto-cache-dir %t.cache
+; RUN: not ls %t.cache/llvmcache-foo
+
+; Verify that specifying a negative number for the pruning interval
+; effectively disables the pruning
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; RUN: touch -t 197001011200 %t.cache/llvmcache-foo
+; RUN: touch -t 197001011200 %t.cache/llvmcache.timestamp
+; RUN: llvm-lto -thinlto-action=run -exported-symbol=globalfunc %t2.bc %t.bc -thinlto-cache-dir %t.cache --thinlto-cache-pruning-interval -1
+; RUN: ls %t.cache/llvmcache-foo
+
+; Verify that the pruner doesn't run and a cache file is not deleted when: 
+; default values for pruning interval and cache expiration are used, 
+; llvmcache.timestamp is current, 
+; cache file is older than default cache expiration value.
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; RUN: touch -t 197001011200 %t.cache/llvmcache-foo
+; RUN: touch %t.cache/llvmcache.timestamp
+; RUN: llvm-lto -thinlto-action=run -exported-symbol=globalfunc %t2.bc %t.bc -thinlto-cache-dir %t.cache
+; RUN: ls %t.cache/llvmcache-foo
+
+; Verify that the pruner runs and a cache file is deleted when:
+; pruning interval has value 0 (i.e. run garbage collector now)
+; default value for cache expiration is used,
+; llvmcache.timestamp is current,
+; cache file is older than default cache expiration value.
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; RUN: touch -t 197001011200 %t.cache/llvmcache-foo
+; RUN: touch %t.cache/llvmcache.timestamp
+; RUN: llvm-lto -thinlto-action=run -exported-symbol=globalfunc %t2.bc %t.bc -thinlto-cache-dir %t.cache --thinlto-cache-pruning-interval 0
+; RUN: not ls %t.cache/llvmcache-foo
+
+; Populate the cache with files with "old" access times, then check llvm-lto updates these file times
+; A negative pruning interval is used to avoid removing cache entries
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; RUN: llvm-lto -thinlto-action=run -exported-symbol=globalfunc %t2.bc %t.bc -thinlto-cache-dir %t.cache
+; RUN: touch -a -t 197001011200 %t.cache/llvmcache-*
+; RUN: llvm-lto -thinlto-action=run -exported-symbol=globalfunc %t2.bc %t.bc -thinlto-cache-dir %t.cache --thinlto-cache-pruning-interval -1
+; RUN: ls -ltu %t.cache/* | not grep 1970-01-01
+
+; Populate the cache with files with "old" access times, then check llvm-lto2 updates these file times
+; RUN: rm -Rf %t.cache
+; RUN: llvm-lto2 run -o %t.o %t2.bc %t.bc -cache-dir %t.cache \
+; RUN:  -r=%t2.bc,_main,plx \
+; RUN:  -r=%t2.bc,_globalfunc,lx \
+; RUN:  -r=%t.bc,_globalfunc,plx
+; RUN: touch -a -t 197001011200 %t.cache/llvmcache-*
+; RUN: llvm-lto2 run -o %t.o %t2.bc %t.bc -cache-dir %t.cache \
+; RUN:  -r=%t2.bc,_main,plx \
+; RUN:  -r=%t2.bc,_globalfunc,lx \
+; RUN:  -r=%t.bc,_globalfunc,plx
+; RUN: ls -ltu %t.cache/* | not grep 1970-01-01
+
+; Verify that specifying max size for the cache directory prunes it to this
+; size, removing the oldest files first.
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; Create cache files with different sizes.
+; Only 8B and 76B files should stay after pruning.
+; RUN: %python -c "with open(r'%t.cache/llvmcache-foo-100k', 'w') as file: file.truncate(102400)"
+; RUN: touch -t 198002011200 %t.cache/llvmcache-foo-100k
+; RUN: %python -c "with open(r'%t.cache/llvmcache-foo-16', 'w') as file: file.truncate(16)"
+; RUN: touch -t 198002021200 %t.cache/llvmcache-foo-16
+; RUN: %python -c "with open(r'%t.cache/llvmcache-foo-77k', 'w') as file: file.truncate(78848)"
+; RUN: touch -t 198002031200 %t.cache/llvmcache-foo-77k
+; RUN: %python -c "with open(r'%t.cache/llvmcache-foo-8', 'w') as file: file.truncate(8)"
+; RUN: touch -t 198002041200 %t.cache/llvmcache-foo-8
+; RUN: %python -c "with open(r'%t.cache/llvmcache-foo-76', 'w') as file: file.truncate(76)"
+; RUN: touch -t 198002051200 %t.cache/llvmcache-foo-76
+; RUN: llvm-lto -thinlto-action=run -exported-symbol=globalfunc %t2.bc %t.bc -thinlto-cache-dir %t.cache --thinlto-cache-max-size-bytes 78847 --thinlto-cache-entry-expiration 4294967295
+; RUN: ls %t.cache/llvmcache-foo-8
+; RUN: ls %t.cache/llvmcache-foo-76
+; RUN: not ls %t.cache/llvmcache-foo-16
+; RUN: not ls %t.cache/llvmcache-foo-100k
+; RUN: not ls %t.cache/llvmcache-foo-77k
+
+; Verify that specifying a max size > 4GB for the cache directory does not
+; prematurely prune, due to an integer overflow.
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; RUN: %python -c "with open(r'%t.cache/llvmcache-foo-10', 'w') as file: file.truncate(10)"
+; RUN: llvm-lto -thinlto-action=run -exported-symbol=globalfunc %t2.bc %t.bc -thinlto-cache-dir %t.cache --thinlto-cache-max-size-bytes 4294967297
+; RUN: ls %t.cache/llvmcache-foo-10
+
+; Verify that negative numbers aren't accepted for the
+; --thinlto-cache-max-size-bytes switch
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; RUN: not llvm-lto %t.bc --thinlto-cache-max-size-bytes -1 2>&1 | FileCheck %s
+; CHECK: -thinlto-cache-max-size-bytes option: '-1' value invalid
+
+; Verify that specifying max number of files in the cache directory prunes
+; it to this amount, removing the oldest files first.
+; RUN: rm -Rf %t.cache && mkdir %t.cache
+; Create cache files with different sizes.
+; Only 75B and 76B files should stay after pruning.
+; RUN: %python -c "print(' ' * 1023)" > %t.cache/llvmcache-foo-1023
+; RUN: touch -t 198002011200 %t.cache/llvmcache-foo-1023
+; RUN: %python -c "print(' ' * 15)" > %t.cache/llvmcache-foo-15
+; RUN: touch -t 198002021200 %t.cache/llvmcache-foo-15
+; RUN: %python -c "print(' ' * 7)" > %t.cache/llvmcache-foo-7
+; RUN: touch -t 198002031200 %t.cache/llvmcache-foo-7
+; RUN: %python -c "print(' ' * 75)" > %t.cache/llvmcache-foo-75
+; RUN: touch -t 198002041200 %t.cache/llvmcache-foo-75
+; RUN: %python -c "print(' ' * 76)" > %t.cache/llvmcache-foo-76
+; RUN: touch -t 198002051200 %t.cache/llvmcache-foo-76
+; RUN: llvm-lto -thinlto-action=run -exported-symbol=globalfunc %t2.bc %t.bc -thinlto-cache-dir %t.cache --thinlto-cache-max-size-files 4 --thinlto-cache-entry-expiration 4294967295
+; RUN: ls %t.cache/llvmcache-foo-75
+; RUN: ls %t.cache/llvmcache-foo-76
+; RUN: not ls %t.cache/llvmcache-foo-15
+; RUN: not ls %t.cache/llvmcache-foo-1024
+; RUN: not ls %t.cache/llvmcache-foo-7
+
+target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.11.0"
+
+define void @globalfunc() #0 {
+entry:
+  ret void
+}