[PATCH] D18009: [lto] Add saving the LTO .o file to -save-temps.
Sean Silva via llvm-commits
llvm-commits at lists.llvm.org
Wed Mar 9 14:34:58 PST 2016
This revision was automatically updated to reflect the committed changes.
Closed by commit rL263070: [lto] Add saving the LTO .o file to -save-temps. (authored by silvas).
Changed prior to commit:
http://reviews.llvm.org/D18009?vs=50178&id=50200#toc
Repository:
rL LLVM
http://reviews.llvm.org/D18009
Files:
lld/trunk/ELF/SymbolTable.cpp
lld/trunk/test/ELF/lto/save-temps.ll
Index: lld/trunk/test/ELF/lto/save-temps.ll
===================================================================
--- lld/trunk/test/ELF/lto/save-temps.ll
+++ lld/trunk/test/ELF/lto/save-temps.ll
@@ -1,17 +1,18 @@
; REQUIRES: x86
-; RUN: rm -f %t.so %t.so.lto.bc
+; RUN: rm -f %t.so %t.so.lto.bc %t.so.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.so -save-temps
; RUN: llvm-nm %t.so | FileCheck %s
; RUN: llvm-nm %t.so.lto.bc | FileCheck %s
+; RUN: llvm-nm %t.so.lto.o | FileCheck %s
target triple = "x86_64-unknown-linux-gnu"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define void @foo() {
ret void
}
-; CHECK-DAG: T bar
-; CHECK-DAG: T foo
+; CHECK: T bar
+; CHECK: T foo
Index: lld/trunk/ELF/SymbolTable.cpp
===================================================================
--- lld/trunk/ELF/SymbolTable.cpp
+++ lld/trunk/ELF/SymbolTable.cpp
@@ -96,6 +96,15 @@
resolve(B);
}
+// This is for use when debugging LTO.
+static void saveLtoObjectFile(StringRef Buffer) {
+ std::error_code EC;
+ raw_fd_ostream OS(Config->OutputFile.str() + ".lto.o", EC,
+ sys::fs::OpenFlags::F_None);
+ check(EC);
+ OS << Buffer;
+}
+
// Codegen the module M and returns the resulting InputFile.
template <class ELFT>
std::unique_ptr<InputFile> SymbolTable<ELFT>::codegen(Module &M) {
@@ -123,6 +132,8 @@
fatal("Failed to setup codegen");
CodeGenPasses.run(M);
LtoBuffer = MemoryBuffer::getMemBuffer(OwningLTOData, "", false);
+ if (Config->SaveTemps)
+ saveLtoObjectFile(LtoBuffer->getBuffer());
return createObjectFile(*LtoBuffer);
}
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