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Print quoted backslashes in LLVM IR as \\ instead of \5C

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This improves readability of Windows path string literals in LLVM IR.
The LLVM assembler has supported \\ in IR strings for a long time, but
the lexer doesn't tolerate escaped quotes, so they have to be printed as
\22 for now.

llvm-svn: 374415
This commit is contained in:
Reid Kleckner 2019-10-10 18:31:57 +00:00
parent c82a4f49bc
commit 70a99e77f2
6 changed files with 10 additions and 9 deletions
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4
lib/Support/StringExtras.cpp
View File

@ -60,7 +60,9 @@ void llvm::SplitString(StringRef Source,
void llvm::printEscapedString(StringRef Name, raw_ostream &Out) {
for (unsigned i = 0, e = Name.size(); i != e; ++i) {
unsigned char C = Name[i];
if (isPrint(C) && C != '\\' && C != '"')
if (C == '\\')
Out << '\\' << C;
else if (isPrint(C) && C != '"')
Out << C;
else
Out << '\\' << hexdigit(C >> 4) << hexdigit(C & 0x0F);

4
test/Assembler/asm-path-writer.ll
View File

@ -1,6 +1,6 @@
; RUN: llvm-as < %s | llvm-dis | FileCheck %s
; CHECK: ^0 = module: (path: ".\5Cf4folder\5Cabc.o", hash: (0, 0, 0, 0, 0))
; CHECK: ^0 = module: (path: ".\\f4folder\\abc.o", hash: (0, 0, 0, 0, 0))
^0 = module: (path: ".\5Cf4folder\5Cabc.o", hash: (0, 0, 0, 0, 0))
^0 = module: (path: ".\5Cf4folder\\abc.o", hash: (0, 0, 0, 0, 0))
^1 = gv: (guid: 15822663052811949562, summaries: (function: (module: ^0, flags: (linkage: external, notEligibleToImport: 0, live: 0, dsoLocal: 0), insts: 2)))

5
test/Assembler/source-filename-backslash.ll
View File

@ -1,8 +1,7 @@
; Make sure that llvm-as/llvm-dis properly assemble/disassemble the
; source_filename.
; RUN: llvm-as < %s | llvm-dis | FileCheck %s
; CHECK: source_filename = "C:\5Cpath\5Cwith\5Cbackslashes\5Ctest.cc"
source_filename = "C:\5Cpath\5Cwith\5Cbackslashes\5Ctest.cc"
; CHECK: source_filename = "C:\\path\\with\\backslashes\\test.cc"
source_filename = "C:\\path\\with\5Cbackslashes\\test.cc"

2
test/CodeGen/MIR/X86/global-value-operands.mir
View File

@ -103,7 +103,7 @@ body: |
name: test2
body: |
bb.0.entry:
; CHECK: , @"\01Hello@$%09 \5C World,",
; CHECK: , @"\01Hello@$%09 \\ World,",
$rax = MOV64rm $rip, 1, _, @"\01Hello@$%09 \\ World,", _
$eax = MOV32rm killed $rax, 1, _, 0, _
RETQ $eax

2
unittests/ADT/StringExtrasTest.cpp
View File

@ -109,7 +109,7 @@ TEST(StringExtrasTest, printEscapedString) {
std::string str;
raw_string_ostream OS(str);
printEscapedString("ABCdef123&<>\\\"'\t", OS);
EXPECT_EQ("ABCdef123&<>\\5C\\22'\\09", OS.str());
EXPECT_EQ("ABCdef123&<>\\\\\\22'\\09", OS.str());
}
TEST(StringExtrasTest, printHTMLEscaped) {

2
unittests/IR/MetadataTest.cpp
View File

@ -164,7 +164,7 @@ TEST_F(MDStringTest, PrintingComplex) {
std::string Str;
raw_string_ostream oss(Str);
s->print(oss);
EXPECT_STREQ("!\"\\00\\0A\\22\\5C\\FF\"", oss.str().c_str());
EXPECT_STREQ("!\"\\00\\0A\\22\\\\\\FF\"", oss.str().c_str());
}
typedef MetadataTest MDNodeTest;