[lld] 963d7b4 - [ELF] Improve --thinlto-index-only and --thinlto-emit-index-files tests
Fangrui Song via llvm-commits
llvm-commits at lists.llvm.org
Fri Jan 19 22:02:26 PST 2024
Author: Fangrui Song
Date: 2024-01-19T22:02:21-08:00
New Revision: 963d7b4b2a0a80e29d4a862c3629a21de0af975f
URL: https://github.com/llvm/llvm-project/commit/963d7b4b2a0a80e29d4a862c3629a21de0af975f
DIFF: https://github.com/llvm/llvm-project/commit/963d7b4b2a0a80e29d4a862c3629a21de0af975f.diff
LOG: [ELF] Improve --thinlto-index-only and --thinlto-emit-index-files tests
Added:
Modified:
lld/test/ELF/lto/thinlto-emit-imports.ll
lld/test/ELF/lto/thinlto-emit-index.ll
lld/test/ELF/lto/thinlto-index-only.ll
Removed:
lld/test/ELF/lto/thinlto-index-file.ll
################################################################################
diff --git a/lld/test/ELF/lto/thinlto-emit-imports.ll b/lld/test/ELF/lto/thinlto-emit-imports.ll
index fcddd18cc74470..6d0e1e65047db4 100644
--- a/lld/test/ELF/lto/thinlto-emit-imports.ll
+++ b/lld/test/ELF/lto/thinlto-emit-imports.ll
@@ -1,32 +1,10 @@
; REQUIRES: x86
+;; Test a few properties not tested by thinlto-index-only.ll
-; Generate summary sections and test lld handling.
; RUN: opt -module-summary %s -o %t1.o
; RUN: opt -module-summary %p/Inputs/thinlto.ll -o %t2.o
-
-; Include a file with an empty module summary index, to ensure that the expected
-; output files are created regardless, for a distributed build system.
; RUN: opt -module-summary %p/Inputs/thinlto_empty.ll -o %t3.o
-; Ensure lld generates imports files if requested for distributed backends.
-; RUN: rm -f %t3.o.imports %t3.o.thinlto.bc
-; RUN: ld.lld --plugin-opt=thinlto-index-only --plugin-opt=thinlto-emit-imports-files -shared %t1.o %t2.o %t3.o -o %t4
-
-; The imports file for this module contains the bitcode file for
-; Inputs/thinlto.ll
-; RUN: count 1 < %t1.o.imports
-; RUN: FileCheck %s --check-prefix=IMPORTS1 < %t1.o.imports
-; IMPORTS1: thinlto-emit-imports.ll.tmp2.o
-
-; The imports file for Input/thinlto.ll is empty as it does not import anything.
-; RUN: count 0 < %t2.o.imports
-
-; The imports file for Input/thinlto_empty.ll is empty but should exist.
-; RUN: count 0 < %t3.o.imports
-
-; The index file should be created even for the input with an empty summary.
-; RUN: ls %t3.o.thinlto.bc
-
; Ensure lld generates error if unable to write to imports file.
; RUN: rm -f %t3.o.imports
; RUN: touch %t3.o.imports
@@ -34,22 +12,12 @@
; RUN: not ld.lld --plugin-opt=thinlto-index-only --plugin-opt=thinlto-emit-imports-files -shared %t1.o %t2.o %t3.o -o /dev/null 2>&1 | FileCheck -DMSG=%errc_EACCES %s --check-prefix=ERR
; ERR: cannot open {{.*}}3.o.imports: [[MSG]]
-; Ensure lld doesn't generate import files when thinlto-index-only is not enabled
-; RUN: rm -f %t1.o.imports
-; RUN: rm -f %t2.o.imports
-; RUN: rm -f %t3.o.imports
+; RUN: rm -f %t1.o.imports %t2.o.imports rm -f %t3.o.imports
; RUN: ld.lld --plugin-opt=thinlto-emit-imports-files -shared %t1.o %t2.o %t3.o -o %t4
; RUN: not ls %t1.o.imports
; RUN: not ls %t2.o.imports
; RUN: not ls %t3.o.imports
-; Check that imports files are generated also when --thinlto-index-only
-; is specified without --plugin-opt=.
-; RUN: rm -f %t1.o.imports
-; RUN: ld.lld --thinlto-index-only --thinlto-emit-imports-files -shared %t1.o %t2.o %t3.o -o %t4
-; RUN: count 1 < %t1.o.imports
-; RUN: FileCheck %s --check-prefix=IMPORTS1 < %t1.o.imports
-
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
diff --git a/lld/test/ELF/lto/thinlto-emit-index.ll b/lld/test/ELF/lto/thinlto-emit-index.ll
index ae8b4ddeb1bf15..ba2ac2ceb689f5 100644
--- a/lld/test/ELF/lto/thinlto-emit-index.ll
+++ b/lld/test/ELF/lto/thinlto-emit-index.ll
@@ -3,40 +3,40 @@
;; Mostly copied/updated from thinlto-index-only.ll
;; First ensure that the ThinLTO handling in lld handles
;; bitcode without summary sections gracefully and generates index file.
-; RUN: rm -rf %t.dir && mkdir %t.dir && cd %t.dir
+; RUN: rm -rf %t && mkdir %t && cd %t
+; RUN: mkdir d
; RUN: llvm-as %s -o 1.o
-; RUN: llvm-as %p/Inputs/thinlto.ll -o 2.o
-; RUN: ld.lld --thinlto-emit-index-files -shared 1.o 2.o -o 3
-; RUN: ls 2.o.thinlto.bc
+; RUN: llvm-as %p/Inputs/thinlto.ll -o d/2.o
+; RUN: ld.lld --thinlto-emit-index-files -shared 1.o d/2.o -o 3
+; RUN: ls d/2.o.thinlto.bc
; RUN: ls 3
-; RUN: ld.lld -shared 1.o 2.o -o 3
+; RUN: ld.lld -shared 1.o d/2.o -o 3
; RUN: llvm-nm 3 | FileCheck %s --check-prefix=NM
;; Basic ThinLTO tests.
; RUN: opt -module-summary %s -o 1.o
-; RUN: opt -module-summary %p/Inputs/thinlto.ll -o 2.o
+; RUN: opt -module-summary %p/Inputs/thinlto.ll -o d/2.o
; RUN: opt -module-summary %p/Inputs/thinlto_empty.ll -o 3.o
+; RUN: cp 3.o 4.o
;; Ensure lld generates an index and also a binary if requested.
-; RUN: ld.lld --thinlto-emit-index-files -shared 1.o 2.o -o 4
-; RUN: llvm-bcanalyzer -dump 1.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND1
-; RUN: llvm-bcanalyzer -dump 2.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND2
+; RUN: ld.lld --thinlto-emit-index-files -shared 1.o --start-lib d/2.o 3.o --end-lib 4.o -o 4
; RUN: ls 4
+; RUN: llvm-bcanalyzer -dump 1.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND1
+; RUN: llvm-bcanalyzer -dump d/2.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND2
+; RUN: llvm-dis < 3.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND3
+; RUN: llvm-dis < 4.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND4
+
+; IMPORTS1: d/2.o
;; Ensure lld generates an index and not a binary if both emit-index and index-only are present.
-; RUN: ld.lld --thinlto-emit-index-files --thinlto-index-only -shared 1.o 2.o -o 5
+; RUN: ld.lld --thinlto-emit-index-files --thinlto-index-only -shared 1.o d/2.o -o 5
; RUN: not ls 5
-;; Ensure lld generates an index even if the file is wrapped in --start-lib/--end-lib
-; RUN: rm -f 2.o.thinlto.bc
-; RUN: ld.lld --thinlto-emit-index-files -shared 1.o 3.o --start-lib 2.o --end-lib -o 6
-; RUN: llvm-dis < 2.o.thinlto.bc | grep -q '\^0 = module:'
-; RUN: ls 6
-
;; Test that LLD generates an empty index even for lazy object file that is not added to link.
;; Test that LLD also generates empty imports file with the --thinlto-emit-imports-files option.
; RUN: rm -f 1.o.thinlto.bc 1.o.imports
-; RUN: ld.lld --thinlto-emit-index-files -shared 2.o --start-lib 1.o --end-lib \
+; RUN: ld.lld --thinlto-emit-index-files -shared d/2.o --start-lib 1.o --end-lib \
; RUN: --thinlto-emit-imports-files -o 7
; RUN: ls 7
; RUN: ls 1.o.thinlto.bc
@@ -50,19 +50,19 @@
; RUN: ls 1.o.thinlto.bc
;; Test that LLD errors out when run with suffix replacement, or prefix replacement
-; RUN: not ld.lld --thinlto-emit-index-files -shared 2.o --start-lib 1.o --end-lib \
+; RUN: not ld.lld --thinlto-emit-index-files -shared d/2.o --start-lib 1.o --end-lib \
; RUN: --thinlto-prefix-replace="abc;xyz" 2>&1 | FileCheck %s --check-prefix=ERR1
; ERR1: --thinlto-prefix-replace is not supported with --thinlto-emit-index-files
-; RUN: not ld.lld --thinlto-emit-index-files -shared 2.o --start-lib 1.o --end-lib \
+; RUN: not ld.lld --thinlto-emit-index-files -shared d/2.o --start-lib 1.o --end-lib \
; RUN: --thinlto-object-suffix-replace="abc;xyz" 2>&1 | FileCheck %s --check-prefix=ERR2
; ERR2: --thinlto-object-suffix-replace is not supported with --thinlto-emit-index-files
;; But not when passed with index only as well
-; RUN: ld.lld --thinlto-emit-index-files -shared 2.o --start-lib 1.o --end-lib \
+; RUN: ld.lld --thinlto-emit-index-files -shared d/2.o --start-lib 1.o --end-lib \
; RUN: --thinlto-prefix-replace="abc;xyz" --thinlto-index-only
-; RUN: ld.lld --thinlto-emit-index-files -shared 2.o --start-lib 1.o --end-lib \
+; RUN: ld.lld --thinlto-emit-index-files -shared d/2.o --start-lib 1.o --end-lib \
; RUN: --thinlto-object-suffix-replace="abc;xyz" --thinlto-index-only
; NM: T f
@@ -71,7 +71,7 @@
;; Inputs/thinlto.ll, as it imports from the latter.
; BACKEND1: <MODULE_STRTAB_BLOCK
; BACKEND1-NEXT: <ENTRY {{.*}} record string = '1.o'
-; BACKEND1-NEXT: <ENTRY {{.*}} record string = '2.o'
+; BACKEND1-NEXT: <ENTRY {{.*}} record string = 'd/2.o'
; BACKEND1-NEXT: </MODULE_STRTAB_BLOCK
; BACKEND1: <GLOBALVAL_SUMMARY_BLOCK
; BACKEND1: <VERSION
@@ -85,7 +85,7 @@
;; The backend index for Input/thinlto.ll contains summaries from itself only,
;; as it does not import anything.
; BACKEND2: <MODULE_STRTAB_BLOCK
-; BACKEND2-NEXT: <ENTRY {{.*}} record string = '2.o'
+; BACKEND2-NEXT: <ENTRY {{.*}} record string = 'd/2.o'
; BACKEND2-NEXT: </MODULE_STRTAB_BLOCK
; BACKEND2-NEXT: <GLOBALVAL_SUMMARY_BLOCK
; BACKEND2-NEXT: <VERSION
@@ -94,6 +94,10 @@
; BACKEND2-NEXT: <COMBINED
; BACKEND2-NEXT: </GLOBALVAL_SUMMARY_BLOCK
+; BACKEND3: ^0 = flags:
+
+; BACKEND4: ^0 = module: (path: "4.o", hash: (0, 0, 0, 0, 0))
+
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
diff --git a/lld/test/ELF/lto/thinlto-index-file.ll b/lld/test/ELF/lto/thinlto-index-file.ll
deleted file mode 100644
index 00feef725844be..00000000000000
--- a/lld/test/ELF/lto/thinlto-index-file.ll
+++ /dev/null
@@ -1,27 +0,0 @@
-; REQUIRES: x86
-; RUN: rm -rf %t && mkdir %t && cd %t
-; RUN: opt -module-summary %s -o 1.o
-; RUN: opt -module-summary %p/Inputs/thinlto.ll -o 2.o
-; RUN: opt -module-summary %p/Inputs/thinlto_empty.ll -o 3.o
-
-;; Ensure lld writes linked files to linked objects file
-; RUN: ld.lld --plugin-opt=thinlto-index-only=1.txt -shared 1.o 2.o 3.o -o /dev/null
-; RUN: FileCheck %s < 1.txt
-; CHECK: 1.o
-; CHECK: 2.o
-; CHECK: 3.o
-
-;; Check that this also works without the --plugin-opt= prefix.
-; RUN: ld.lld --thinlto-index-only=2.txt -shared 1.o 2.o 3.o -o /dev/null
-; RUN:
diff 1.txt 2.txt
-
-target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-unknown-linux-gnu"
-
-declare void @g(...)
-
-define void @f() {
-entry:
- call void (...) @g()
- ret void
-}
diff --git a/lld/test/ELF/lto/thinlto-index-only.ll b/lld/test/ELF/lto/thinlto-index-only.ll
index 0b64958007b28d..abf58ce5ea4113 100644
--- a/lld/test/ELF/lto/thinlto-index-only.ll
+++ b/lld/test/ELF/lto/thinlto-index-only.ll
@@ -1,46 +1,75 @@
; REQUIRES: x86
-; RUN: rm -rf %t && mkdir %t && cd %t
+; RUN: rm -rf %t && split-file %s %t && cd %t
+; RUN: mkdir d
;; First ensure that the ThinLTO handling in lld handles
;; bitcode without summary sections gracefully and generates index file.
-; RUN: llvm-as %s -o 1.o
-; RUN: llvm-as %p/Inputs/thinlto.ll -o 2.o
-; RUN: ld.lld --plugin-opt=thinlto-index-only -shared 1.o 2.o -o 3
-; RUN: ls 2.o.thinlto.bc
+; RUN: llvm-as 1.ll -o 1.o
+; RUN: llvm-as %p/Inputs/thinlto.ll -o d/2.o
+; RUN: ld.lld --plugin-opt=thinlto-index-only -shared 1.o d/2.o -o 3
+; RUN: ls d/2.o.thinlto.bc
; RUN: not test -e 3
-; RUN: ld.lld -shared 1.o 2.o -o 3
+; RUN: ld.lld -shared 1.o d/2.o -o 3
; RUN: llvm-nm 3 | FileCheck %s --check-prefix=NM
;; Basic ThinLTO tests.
-; RUN: opt -module-summary %s -o 1.o
-; RUN: opt -module-summary %p/Inputs/thinlto.ll -o 2.o
+; RUN: llvm-as 0.ll -o 0.o
+; RUN: opt -module-summary 1.ll -o 1.o
+; RUN: opt -module-summary %p/Inputs/thinlto.ll -o d/2.o
; RUN: opt -module-summary %p/Inputs/thinlto_empty.ll -o 3.o
+; RUN: cp 3.o 4.o
;; Ensure lld doesn't generates index files when --thinlto-index-only is not enabled.
-; RUN: rm -f 1.o.thinlto.bc 2.o.thinlto.bc
-; RUN: ld.lld -shared 1.o 2.o -o 5
+; RUN: rm -f 1.o.thinlto.bc d/2.o.thinlto.bc
+; RUN: ld.lld -shared 1.o d/2.o -o /dev/null
; RUN: not ls 1.o.thinlto.bc
-; RUN: not ls 2.o.thinlto.bc
+; RUN: not ls d/2.o.thinlto.bc
;; Ensure lld generates an index and not a binary if requested.
-; RUN: ld.lld --plugin-opt=thinlto-index-only -shared 1.o 2.o -o 4
+; RUN: ld.lld --plugin-opt=thinlto-index-only -shared 1.o --start-lib d/2.o 3.o --end-lib 4.o -o 4
+; RUN: not test -e 4
; RUN: llvm-bcanalyzer -dump 1.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND1
-; RUN: llvm-bcanalyzer -dump 2.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND2
+; RUN: llvm-bcanalyzer -dump d/2.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND2
+; RUN: llvm-dis < 3.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND3
+; RUN: llvm-dis < 4.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND4
+
+; RUN: rm -f 1.o.thinlto.bc d/2.o.thinlto.bc 3.o.thinlto.bc 4.o.thinlto.bc
+; RUN: ld.lld --plugin-opt=thinlto-index-only=4.txt --plugin-opt=thinlto-emit-imports-files -shared 1.o --start-lib d/2.o 3.o --end-lib 4.o -o 4
; RUN: not test -e 4
+; RUN: FileCheck %s --check-prefix=RSP --implicit-check-not={{.}} < 4.txt
+; RUN: llvm-bcanalyzer -dump 1.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND1
+; RUN: llvm-bcanalyzer -dump d/2.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND2
+; RUN: llvm-dis < 3.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND3
+; RUN: llvm-dis < 4.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND4
+; RUN: FileCheck %s --check-prefix=IMPORTS1 --implicit-check-not={{.}} < 1.o.imports
+; RUN: count 0 < d/2.o.imports
+;; Test that LLD generates an empty index even for lazy object file that is not added to link.
+; RUN: count 0 < 3.o.imports
+; RUN: count 0 < 4.o.imports
-;; Ensure lld generates an index even if the file is wrapped in --start-lib/--end-lib.
-; RUN: rm -f 2.o.thinlto.bc 4
-; RUN: ld.lld --plugin-opt=thinlto-index-only -shared 1.o 3.o --start-lib 2.o --end-lib -o 4
-; RUN: llvm-dis < 2.o.thinlto.bc | grep -q '\^0 = module:'
+;; Test the other spelling --thinlto-index-only= --thinlto-emit-imports-files and the interaction with --save-temps.
+; RUN: rm -f 4.txt 1.o.thinlto.bc d/2.o.thinlto.bc 3.o.thinlto.bc 4.o.thinlto.bc
+; RUN: ld.lld --thinlto-index-only=4.txt --thinlto-emit-imports-files --save-temps -shared 0.o 1.o --start-lib d/2.o 3.o --end-lib 4.o -o t
; RUN: not test -e 4
+; RUN: FileCheck %s --check-prefix=RSP --implicit-check-not={{.}} < 4.txt
+; RUN: llvm-bcanalyzer -dump 1.o.thinlto.bc | FileCheck %s --check-prefix=BACKEND1
+; RUN: FileCheck %s --check-prefix=IMPORTS1 --implicit-check-not={{.}} < 1.o.imports
+; RUN: FileCheck %s --check-prefix=RESOLUTION < t.resolution.txt
+; RUN: llvm-dis < t.index.bc | FileCheck %s --check-prefix=INDEX-BC
-;; Test that LLD generates an empty index even for lazy object file that is not added to link.
-;; Test LLD generates empty imports file either because of thinlto-emit-imports-files option.
-; RUN: rm -f 1.o.thinlto.bc 1.o.imports
-; RUN: ld.lld --plugin-opt=thinlto-index-only -shared 2.o --start-lib 1.o --end-lib \
-; RUN: --plugin-opt=thinlto-emit-imports-files -o 3
-; RUN: ls 1.o.thinlto.bc
-; RUN: ls 1.o.imports
+; RSP: 1.o
+; RSP-NEXT: d/2.o
+; RSP-NEXT: 4.o
+
+; IMPORTS1: d/2.o
+
+; RESOLUTION: 0.o
+; RESOLUTION-NEXT: -r=0.o,foo,px
+; RESOLUTION-NEXT: 1.o
+
+; INDEX-BC: ^0 = module: (path: "1.o", hash: (0, 0, 0, 0, 0))
+; INDEX-BC-NEXT: ^1 = module: (path: "4.o", hash: (0, 0, 0, 0, 0))
+; INDEX-BC-NEXT: ^2 = module: (path: "d/2.o", hash: (0, 0, 0, 0, 0))
;; Ensure LLD generates an empty index for each bitcode file even if all bitcode files are lazy.
; RUN: rm -f 1.o.thinlto.bc
@@ -50,18 +79,18 @@
;; Ensure when the same bitcode object is given as both lazy and non-lazy,
;; LLD does not generate an empty index for the lazy object.
-; RUN: rm -f 2.o.thinlto.bc
-; RUN: ld.lld --plugin-opt=thinlto-index-only -shared 1.o 2.o --start-lib 2.o --end-lib -o /dev/null
-; RUN: llvm-dis < 2.o.thinlto.bc | grep -q '\^0 = module:'
-; RUN: rm -f 2.o.thinlto.bc
-; RUN: ld.lld --plugin-opt=thinlto-index-only -shared --start-lib 2.o --end-lib 2.o 1.o -o /dev/null
-; RUN: llvm-dis < 2.o.thinlto.bc | grep -q '\^0 = module:'
+; RUN: rm -f d/2.o.thinlto.bc
+; RUN: ld.lld --plugin-opt=thinlto-index-only -shared 1.o d/2.o --start-lib d/2.o --end-lib -o /dev/null
+; RUN: llvm-dis < d/2.o.thinlto.bc | grep -q '\^0 = module:'
+; RUN: rm -f d/2.o.thinlto.bc
+; RUN: ld.lld --plugin-opt=thinlto-index-only -shared --start-lib d/2.o --end-lib d/2.o 1.o -o /dev/null
+; RUN: llvm-dis < d/2.o.thinlto.bc | grep -q '\^0 = module:'
;; Ensure when the same lazy bitcode object is given multiple times,
;; no empty index file is generated if one of the copies is linked.
-; RUN: rm -f 2.o.thinlto.bc
-; RUN: ld.lld --plugin-opt=thinlto-index-only -shared 1.o --start-lib 2.o --end-lib --start-lib 2.o --end-lib -o /dev/null
-; RUN: llvm-dis < 2.o.thinlto.bc | grep -q '\^0 = module:'
+; RUN: rm -f d/2.o.thinlto.bc
+; RUN: ld.lld --plugin-opt=thinlto-index-only -shared 1.o --start-lib d/2.o --end-lib --start-lib d/2.o --end-lib -o /dev/null
+; RUN: llvm-dis < d/2.o.thinlto.bc | grep -q '\^0 = module:'
; NM: T f
@@ -69,7 +98,7 @@
;; Inputs/thinlto.ll, as it imports from the latter.
; BACKEND1: <MODULE_STRTAB_BLOCK
; BACKEND1-NEXT: <ENTRY {{.*}} record string = '1.o'
-; BACKEND1-NEXT: <ENTRY {{.*}} record string = '2.o'
+; BACKEND1-NEXT: <ENTRY {{.*}} record string = 'd/2.o'
; BACKEND1-NEXT: </MODULE_STRTAB_BLOCK
; BACKEND1: <GLOBALVAL_SUMMARY_BLOCK
; BACKEND1: <VERSION
@@ -83,7 +112,7 @@
;; The backend index for Input/thinlto.ll contains summaries from itself only,
;; as it does not import anything.
; BACKEND2: <MODULE_STRTAB_BLOCK
-; BACKEND2-NEXT: <ENTRY {{.*}} record string = '2.o'
+; BACKEND2-NEXT: <ENTRY {{.*}} record string = 'd/2.o'
; BACKEND2-NEXT: </MODULE_STRTAB_BLOCK
; BACKEND2-NEXT: <GLOBALVAL_SUMMARY_BLOCK
; BACKEND2-NEXT: <VERSION
@@ -92,6 +121,19 @@
; BACKEND2-NEXT: <COMBINED
; BACKEND2-NEXT: </GLOBALVAL_SUMMARY_BLOCK
+; BACKEND3: ^0 = flags:
+
+; BACKEND4: ^0 = module: (path: "4.o", hash: (0, 0, 0, 0, 0))
+
+;--- 0.ll
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @foo() {
+ ret void
+}
+
+;--- 1.ll
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
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