cffeb54fc9
Summary: In order to simplify distributed build system integration, where actions may be scheduled before the Thin Link which determines the list of objects selected by the linker. The gold plugin currently will emit 0-sized index files for objects not selected by the link, to enable checking for expected output files by the build system. If the build system then schedules a backend action for these bitcode files, we want to be able to fall back to normal compilation instead of failing. Fallback is enabled under an option in LLVM (D28410), in which case a nullptr is returned from llvm::getModuleSummaryIndexForFile. Clang can just proceed with non-ThinLTO compilation in that case. I am investigating whether this can be addressed in our build system, but that is a longer term fix and so this enables a workaround in the meantime. Reviewers: mehdi_amini Subscribers: cfe-commits Differential Revision: https://reviews.llvm.org/D28362 llvm-svn: 291303
43 lines
1.8 KiB
LLVM
43 lines
1.8 KiB
LLVM
; REQUIRES: x86-registered-target
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; RUN: opt -module-summary -o %t1.o %s
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; RUN: opt -module-summary -o %t2.o %S/Inputs/thinlto_backend.ll
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; RUN: llvm-lto -thinlto -o %t %t1.o %t2.o
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; Ensure clang -cc1 give expected error for incorrect input type
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; RUN: not %clang_cc1 -O2 -o %t1.o -x c %s -c -fthinlto-index=%t.thinlto.bc 2>&1 | FileCheck %s -check-prefix=CHECK-WARNING
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; CHECK-WARNING: error: invalid argument '-fthinlto-index={{.*}}' only allowed with '-x ir'
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; Ensure we get expected error for missing index file
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; RUN: %clang -O2 -o %t4.o -x ir %t1.o -c -fthinlto-index=bad.thinlto.bc 2>&1 | FileCheck %s -check-prefix=CHECK-ERROR1
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; CHECK-ERROR1: Error loading index file 'bad.thinlto.bc'
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; Ensure we ignore empty index file under -ignore-empty-index-file, and run
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; non-ThinLTO compilation which would not import f2
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; RUN: touch %t4.thinlto.bc
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; RUN: %clang -O2 -o %t4.o -x ir %t1.o -c -fthinlto-index=%t4.thinlto.bc -mllvm -ignore-empty-index-file
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; RUN: llvm-nm %t4.o | FileCheck --check-prefix=CHECK-OBJ-IGNORE-EMPTY %s
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; CHECK-OBJ-IGNORE-EMPTY: T f1
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; CHECK-OBJ-IGNORE-EMPTY: U f2
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; Ensure f2 was imported
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; RUN: %clang -target x86_64-unknown-linux-gnu -O2 -o %t3.o -x ir %t1.o -c -fthinlto-index=%t.thinlto.bc
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; RUN: llvm-nm %t3.o | FileCheck --check-prefix=CHECK-OBJ %s
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; CHECK-OBJ: T f1
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; CHECK-OBJ-NOT: U f2
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; Ensure we get expected error for input files without summaries
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; RUN: opt -o %t2.o %s
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; RUN: %clang -target x86_64-unknown-linux-gnu -O2 -o %t3.o -x ir %t1.o -c -fthinlto-index=%t.thinlto.bc 2>&1 | FileCheck %s -check-prefix=CHECK-ERROR2
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; CHECK-ERROR2: Error loading imported file '{{.*}}': Could not find module summary
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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declare void @f2()
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define void @f1() {
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call void @f2()
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ret void
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}
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