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9e4321c12d
Summary: The clang driver option -save-temps was not passed to the LTO config, so when invoking the ThinLTO backends via clang during distributed builds there was no way to get LTO to save temp files. Getting this to work with ThinLTO distributed builds also required changing the driver to avoid a separate compile step to emit unoptimized bitcode when the input was already bitcode under -save-temps. Not only is this unnecessary in general, it is problematic for ThinLTO backends since the temporary bitcode file to the backend would not match the module path in the combined index, leading to incorrect ThinLTO backend index-based optimizations. Reviewers: pcc Subscribers: mehdi_amini, inglorion, eraman, cfe-commits Differential Revision: https://reviews.llvm.org/D45217 llvm-svn: 330194
61 lines
2.9 KiB
LLVM
61 lines
2.9 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, and run non-ThinLTO compilation which
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; would not import f2
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; RUN: touch %t4.thinlto.bc
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; RUN: %clang -target x86_64-unknown-linux-gnu -O2 -o %t4.o -x ir %t1.o -c -fthinlto-index=%t4.thinlto.bc
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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 we don't fail with index and non-ThinLTO object file, and output must
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; be empty file.
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; RUN: opt -o %t5.o %s
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; RUN: %clang -target x86_64-unknown-linux-gnu -O2 -o %t4.o -x ir %t5.o -c -fthinlto-index=%t.thinlto.bc
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; RUN: llvm-nm %t4.o | count 0
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; Ensure f2 was imported. Check for all 3 flavors of -save-temps[=cwd|obj].
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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 -save-temps=obj
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; RUN: llvm-dis %t1.s.0.3.import.bc -o - | FileCheck --check-prefix=CHECK-IMPORT %s
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; RUN: mkdir -p %T/dir1
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; RUN: (cd %T/dir1 && %clang -target x86_64-unknown-linux-gnu -O2 -o %t3.o -x ir %t1.o -c -fthinlto-index=%t.thinlto.bc -save-temps=cwd)
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; RUN: llvm-dis %T/dir1/*1.s.0.3.import.bc -o - | FileCheck --check-prefix=CHECK-IMPORT %s
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; RUN: mkdir -p %T/dir2
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; RUN: (cd %T/dir2 && %clang -target x86_64-unknown-linux-gnu -O2 -o %t3.o -x ir %t1.o -c -fthinlto-index=%t.thinlto.bc -save-temps)
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; RUN: llvm-dis %T/dir2/*1.s.0.3.import.bc -o - | FileCheck --check-prefix=CHECK-IMPORT %s
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; CHECK-IMPORT: define available_externally void @f2()
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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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declare i8* @f3()
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define void @f1() {
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call void @f2()
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; Make sure that the backend can handle undefined references.
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; Do an indirect call so that the undefined ref shows up in the combined index.
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call void bitcast (i8*()* @f3 to void()*)()
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ret void
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}
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