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[LTO] Fix -save-temps in case -o is not specified. 

Currently we create a file called .lto.bc. In UNIX,
ls(1) by default doesn't show up files starting with
a dot, as they're (only by convention) hidden.
This makes the output of -save-temps a little bit
hard to find. Use "a.out.lto.bc" instead if the
output file is not specified.

While here, change an existing -save-temps test to
exercise this more interesting behaviour.

llvm-svn: 265254
This commit is contained in:
Davide Italiano 2016-04-03 02:16:56 +00:00
parent d4f5a059e0
commit 887d76c392
2 changed files with 13 additions and 9 deletions
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10
lld/ELF/Driver.cpp
View File

@ -434,14 +434,18 @@ template <class ELFT> void LinkerDriver::link(opt::InputArgList &Args) {
for (StringRef S : Config->Undefined)
Symtab.addUndefinedOpt(S);
// -save-temps creates a file based on the output file name so we want
// to set it right before LTO. This code can't be moved to option parsing
// because linker scripts can override the output filename using the
// OUTPUT() directive.
if (Config->OutputFile.empty())
Config->OutputFile = "a.out";
Symtab.addCombinedLtoObject();
for (auto *Arg : Args.filtered(OPT_wrap))
Symtab.wrap(Arg->getValue());
if (Config->OutputFile.empty())
Config->OutputFile = "a.out";
// Write the result to the file.
Symtab.scanShlibUndefined();
if (Config->GcSections)

12
lld/test/ELF/lto/save-temps.ll
View File

@ -1,12 +1,12 @@
; REQUIRES: x86
; RUN: rm -f %t %t.lto.bc %t.lto.o
; RUN: rm -f a.out a.out.lto.bc a.out.lto.o
; RUN: llvm-as %s -o %t.o
; RUN: llvm-as %p/Inputs/save-temps.ll -o %t2.o
; RUN: ld.lld -shared -m elf_x86_64 %t.o %t2.o -o %t -save-temps
; RUN: llvm-nm %t | FileCheck %s
; RUN: llvm-nm %t.lto.bc | FileCheck %s
; RUN: llvm-nm %t.lto.o | FileCheck %s
; RUN: llvm-dis %t.lto.bc
; RUN: ld.lld -shared -m elf_x86_64 %t.o %t2.o -save-temps
; RUN: llvm-nm a.out | FileCheck %s
; RUN: llvm-nm a.out.lto.bc | FileCheck %s
; RUN: llvm-nm a.out.lto.o | FileCheck %s
; RUN: llvm-dis a.out.lto.bc
target triple = "x86_64-unknown-linux-gnu"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"