[llvm] r259641 - [mips] Add SHF_MIPS_GPREL flag to the MIPS .sbss and .sdata sections

[Simon Atanasyan via llvm-commits]

Author: atanasyan
Date: Wed Feb  3 05:50:22 2016
New Revision: 259641

URL: http://llvm.org/viewvc/llvm-project?rev=259641&view=rev
Log:
[mips] Add SHF_MIPS_GPREL flag to the MIPS .sbss and .sdata sections

MIPS ABI states that .sbss and .sdata sections must have SHF_MIPS_GPREL
flag. See Figure 4–7 on page 69 in the following document:
ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/mipsabi.pdf.

Differential Revision: http://reviews.llvm.org/D15740

Added:
    llvm/trunk/test/CodeGen/Mips/mips-shf-gprel.ll
Modified:
    llvm/trunk/lib/Target/Mips/MipsTargetObjectFile.cpp

Modified: llvm/trunk/lib/Target/Mips/MipsTargetObjectFile.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsTargetObjectFile.cpp?rev=259641&r1=259640&r2=259641&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/MipsTargetObjectFile.cpp (original)
+++ llvm/trunk/lib/Target/Mips/MipsTargetObjectFile.cpp Wed Feb  3 05:50:22 2016
@@ -41,10 +41,12 @@ void MipsTargetObjectFile::Initialize(MC
   InitializeELF(TM.Options.UseInitArray);
 
   SmallDataSection = getContext().getELFSection(
-      ".sdata", ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC);
+      ".sdata", ELF::SHT_PROGBITS,
+      ELF::SHF_WRITE | ELF::SHF_ALLOC | ELF::SHF_MIPS_GPREL);
 
   SmallBSSSection = getContext().getELFSection(".sbss", ELF::SHT_NOBITS,
-                                               ELF::SHF_WRITE | ELF::SHF_ALLOC);
+                                               ELF::SHF_WRITE | ELF::SHF_ALLOC |
+                                                   ELF::SHF_MIPS_GPREL);
   this->TM = &static_cast<const MipsTargetMachine &>(TM);
 }
 

Added: llvm/trunk/test/CodeGen/Mips/mips-shf-gprel.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Mips/mips-shf-gprel.ll?rev=259641&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/Mips/mips-shf-gprel.ll (added)
+++ llvm/trunk/test/CodeGen/Mips/mips-shf-gprel.ll Wed Feb  3 05:50:22 2016
@@ -0,0 +1,24 @@
+; Check that .sdata section has SHF_MIPS_GPREL flag.
+
+; RUN: llc -mips-ssection-threshold=16 -mgpopt -mattr=noabicalls \
+; RUN:     -relocation-model=static -march=mips -o - %s -filetype=obj \
+; RUN:   | llvm-readobj -s | FileCheck %s
+
+ at data1 = global [4 x i32] [i32 1, i32 2, i32 3, i32 4], align 4
+ at date2 = global [4 x i32] zeroinitializer, align 4
+
+; CHECK:      Name: .sdata
+; CHECK-NEXT: Type: SHT_PROGBITS
+; CHECK-NEXT: Flags [ (0x10000003)
+; CHECK-NEXT:   SHF_ALLOC
+; CHECK-NEXT:   SHF_MIPS_GPREL
+; CHECK-NEXT:   SHF_WRITE
+; CHECK-NEXT: ]
+
+; CHECK:      Name: .sbss
+; CHECK-NEXT: Type: SHT_NOBITS
+; CHECK-NEXT: Flags [ (0x10000003)
+; CHECK-NEXT:   SHF_ALLOC
+; CHECK-NEXT:   SHF_MIPS_GPREL
+; CHECK-NEXT:   SHF_WRITE
+; CHECK-NEXT: ]