From 72935dd909361e276152c5b1c39ca845b67ae7b5 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Tue, 19 Nov 2013 19:52:52 +0000
Subject: Support multiple COFF sections with the same name but different
 COMDAT.

This is the first step to fix pr17918.

It extends the .section directive a bit, inspired by what the ELF one looks
like. The problem with using linkonce is that given

.section foo
.linkonce....

.section foo
.linkonce

we would already have switched sections when getting to .linkonce. The cleanest
solution seems to be to add the comdat information in the .section itself.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195148 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/MC/COFF/section-comdat.s | 188 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 188 insertions(+)
 create mode 100644 test/MC/COFF/section-comdat.s

(limited to 'test/MC')

diff --git a/test/MC/COFF/section-comdat.s b/test/MC/COFF/section-comdat.s
new file mode 100644
index 0000000000..dd5be871b0
--- /dev/null
+++ b/test/MC/COFF/section-comdat.s
@@ -0,0 +1,188 @@
+// RUN: llvm-mc -triple i386-pc-win32 -filetype=obj %s | llvm-readobj -s -t | FileCheck %s
+// RUN: llvm-mc -triple x86_64-pc-win32 -filetype=obj %s | llvm-readobj -s -t | FileCheck %s
+
+.section assocSec
+.linkonce
+.long 1
+
+.section secName, "dr", discard, "Symbol1"
+.globl Symbol1
+Symbol1:
+.long 1
+
+.section secName, "dr", one_only, "Symbol2"
+.globl Symbol2
+Symbol2:
+.long 1
+
+.section SecName, "dr", same_size, "Symbol3"
+.globl Symbol3
+Symbol3:
+.long 1
+
+.section SecName, "dr", same_contents, "Symbol4"
+.globl Symbol4
+Symbol4:
+.long 1
+
+.section SecName, "dr", associative assocSec, "Symbol5"
+.globl Symbol5
+Symbol5:
+.long 1
+
+.section SecName, "dr", largest, "Symbol6"
+.globl Symbol6
+Symbol6:
+.long 1
+
+.section SecName, "dr", newest, "Symbol7"
+.globl Symbol7
+Symbol7:
+.long 1
+
+// CHECK: Sections [
+// CHECK:   Section {
+// CHECK:     Number: 1
+// CHECK:     Name: assocSec
+// CHECK:     Characteristics [
+// CHECK:       IMAGE_SCN_LNK_COMDAT
+// CHECK:     ]
+// CHECK:   }
+// CHECK:   Section {
+// CHECK:     Number: 2
+// CHECK:     Name: secName
+// CHECK:     Characteristics [
+// CHECK:       IMAGE_SCN_LNK_COMDAT
+// CHECK:     ]
+// CHECK:   }
+// CHECK:   Section {
+// CHECK:     Number: 3
+// CHECK:     Name: secName
+// CHECK:     Characteristics [
+// CHECK:       IMAGE_SCN_LNK_COMDAT
+// CHECK:     ]
+// CHECK:   }
+// CHECK:   Section {
+// CHECK:     Number: 4
+// CHECK:     Name: SecName
+// CHECK:     Characteristics [
+// CHECK:       IMAGE_SCN_LNK_COMDAT
+// CHECK:     ]
+// CHECK:   }
+// CHECK:   Section {
+// CHECK:     Number: 5
+// CHECK:     Name: SecName
+// CHECK:     Characteristics [
+// CHECK:       IMAGE_SCN_LNK_COMDAT
+// CHECK:     ]
+// CHECK:   }
+// CHECK:   Section {
+// CHECK:     Number: 6
+// CHECK:     Name: SecName
+// CHECK:     Characteristics [
+// CHECK:       IMAGE_SCN_LNK_COMDAT
+// CHECK:     ]
+// CHECK:   }
+// CHECK:   Section {
+// CHECK:     Number: 7
+// CHECK:     Name: SecName
+// CHECK:     Characteristics [
+// CHECK:       IMAGE_SCN_LNK_COMDAT
+// CHECK:     ]
+// CHECK:   }
+// CHECK:   Section {
+// CHECK:     Number: 8
+// CHECK:     Name: SecName
+// CHECK:     Characteristics [
+// CHECK:       IMAGE_SCN_LNK_COMDAT
+// CHECK:     ]
+// CHECK:   }
+// CHECK: ]
+// CHECK: Symbols [
+// CHECK:   Symbol {
+// CHECK:     Name: assocSec
+// CHECK:     Section: assocSec (1)
+// CHECK:     AuxSectionDef {
+// CHECK:       Selection: Any
+// CHECK:     }
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: secName
+// CHECK:     Section: secName (2)
+// CHECK:     AuxSectionDef {
+// CHECK:       Selection: Any
+// CHECK:     }
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: secName
+// CHECK:     Section: secName (3)
+// CHECK:     AuxSectionDef {
+// CHECK:       Selection: NoDuplicates
+// CHECK:     }
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: SecName
+// CHECK:     Section: SecName (4)
+// CHECK:     AuxSectionDef {
+// CHECK:       Selection: SameSize
+// CHECK:     }
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: SecName
+// CHECK:     Section: SecName (5)
+// CHECK:     AuxSymbolCount: 1
+// CHECK:     AuxSectionDef {
+// CHECK:       Selection: ExactMatch
+// CHECK:     }
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: SecName
+// CHECK:     Section: SecName (6)
+// CHECK:     AuxSectionDef {
+// CHECK:       Selection: Associative
+// CHECK:       AssocSection: assocSec (1)
+// CHECK:     }
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: SecName
+// CHECK:     Section: SecName (7)
+// CHECK:     AuxSectionDef {
+// CHECK:       Selection: Largest
+// CHECK:     }
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: SecName
+// CHECK:     Section: SecName (8)
+// CHECK:     AuxSectionDef {
+// CHECK:       Selection: Newest (0x7)
+// CHECK:     }
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: Symbol1
+// CHECK:     Section: secName (2)
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: Symbol2
+// CHECK:     Section: secName (3)
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: Symbol3
+// CHECK:     Section: SecName (4)
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: Symbol4
+// CHECK:     Section: SecName (5)
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: Symbol5
+// CHECK:     Section: SecName (6)
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: Symbol6
+// CHECK:     Section: SecName (7)
+// CHECK:   }
+// CHECK:   Symbol {
+// CHECK:     Name: Symbol7
+// CHECK:     Section: SecName (8)
+// CHECK:   }
+// CHECK: ]
-- 
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