[PATCH] D50065: [LLD] Only increase LMARegion if different from MemRegion

[George Rimar via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL338684: [LLD] Only increase LMARegion if different from MemRegion (authored by grimar, committed by ).

Changed prior to commit:
  https://reviews.llvm.org/D50065?vs=158474&id=158694#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D50065

Files:
  lld/trunk/ELF/LinkerScript.cpp
  lld/trunk/test/ELF/linkerscript/Inputs/at7.s
  lld/trunk/test/ELF/linkerscript/at7.test


Index: lld/trunk/test/ELF/linkerscript/Inputs/at7.s
===================================================================
--- lld/trunk/test/ELF/linkerscript/Inputs/at7.s
+++ lld/trunk/test/ELF/linkerscript/Inputs/at7.s
@@ -0,0 +1,7 @@
+.global _start
+.text
+_start:
+nop
+
+.section .sec, "aw"
+.word 4
Index: lld/trunk/test/ELF/linkerscript/at7.test
===================================================================
--- lld/trunk/test/ELF/linkerscript/at7.test
+++ lld/trunk/test/ELF/linkerscript/at7.test
@@ -0,0 +1,28 @@
+# REQUIRES: x86
+# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %p/Inputs/at7.s -o %t.o
+# RUN: ld.lld %t.o --script %s -o %t
+# RUN: llvm-readelf -sections -program-headers %t | FileCheck %s
+
+MEMORY {
+  RAM    : ORIGIN = 0x20000000, LENGTH = 0x200
+}
+
+SECTIONS {
+ .text : { *(.text) } > RAM AT> RAM
+ .sec  : { *(.sec)  } > RAM
+}
+
+# Make sure the memory for the .text section is only reserved once.
+# Previously, the location counter for both MemRegion and LMARegion
+# was increased unconditionally.
+
+
+# CHECK: Name              Type            Address          Off
+# CHECK: .text             PROGBITS        0000000020000000 001000
+# CHECK: .sec             PROGBITS        0000000020000001 001001
+
+# CHECK: Program Headers:
+# CHECK:      Type  Offset   VirtAddr           PhysAddr
+# CHECK-NEXT: LOAD  0x001000 0x0000000020000000 0x0000000020000000
+# CHECK-NEXT: LOAD  0x001001 0x0000000020000001 0x0000000020000001
+# CHECK-NOT: LOAD
Index: lld/trunk/ELF/LinkerScript.cpp
===================================================================
--- lld/trunk/ELF/LinkerScript.cpp
+++ lld/trunk/ELF/LinkerScript.cpp
@@ -116,7 +116,8 @@
   if (Ctx->MemRegion)
     expandMemoryRegion(Ctx->MemRegion, Size, Ctx->MemRegion->Name,
                        Ctx->OutSec->Name);
-  if (Ctx->LMARegion)
+  // Only expand the LMARegion if it is different from MemRegion.
+  if (Ctx->LMARegion && Ctx->MemRegion != Ctx->LMARegion)
     expandMemoryRegion(Ctx->LMARegion, Size, Ctx->LMARegion->Name,
                        Ctx->OutSec->Name);
 }


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