[ELF] - Linkerscript: accept space between '=' and expression in section filler.

Previously we failed to parse next scripts because disallowed
a space between filler value and '=':

  .text : {
...
  } :text = 0x9090

Differential revision: https://reviews.llvm.org/D24831

llvm-svn: 282248

lld/ELF/LinkerScript.cpp

@@ -1275,8 +1275,12 @@ ScriptParser::readOutputSectionDescription(StringRef OutSec) {
       setError("unknown command " + Tok);
   }
   Cmd->Phdrs = readOutputSectionPhdrs();
-  if (peek().startswith("="))
+
+  if (skip("="))
+    Cmd->Filler = readOutputSectionFiller(next());
+  else if (peek().startswith("="))
     Cmd->Filler = readOutputSectionFiller(next().drop_front());
+
   return Cmd;
 }
 

lld/test/ELF/linkerscript/sections-padding.s

@@ -31,6 +31,11 @@
 # RUN:   | FileCheck --check-prefix=ERR2 %s
 # ERR2: invalid filler expression: 0x99XX
 
+## Check case with space between '=' and expression:
+# RUN: echo "SECTIONS { .mysec : { *(.mysec*) } = 0x1122 }" > %t.script
+# RUN: ld.lld -o %t.out --script %t.script %t
+# RUN: llvm-objdump -s %t.out | FileCheck -check-prefix=YES %s
+
 .section        .mysec.1,"a"
 .align  16
 .byte   0x66