Sets the section names for fixed-size constants and use the mergeable

flag for ELF on x86 so that duplicate constants can be eliminated by
the linker. This matches what GCC does with its -fmerge-constants
option, which is enabled at most -O levels.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36666 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86TargetAsmInfo.cpp b/lib/Target/X86/X86TargetAsmInfo.cpp
index 85ac7a4421eb96e3652d985d9470cd6c53af2d37..67196b6f8fe46f96cd4864f60e53458dc73b1ba4 100644 (file)
--- a/lib/Target/X86/X86TargetAsmInfo.cpp
+++ b/lib/Target/X86/X86TargetAsmInfo.cpp
@@ -107,6 +107,11 @@ X86TargetAsmInfo::X86TargetAsmInfo(const X86TargetMachine &TM) {
     // HasDotFile - True if target asm supports .file directives.
     // bool HasDotFile; // Defaults to false.
     ReadOnlySection = "\t.section\t.rodata\n";
+    FourByteConstantSection = "\t.section\t.rodata.cst4,\"aM\",@progbits,4";
+    EightByteConstantSection = "\t.section\t.rodata.cst8,\"aM\",@progbits,8";
+    SixteenByteConstantSection =
+                             "\t.section\t.rodata.cst16,\"aM\",@progbits,16";
+    CStringSection = "\t.section\t.rodata.str1.1,\"aMS\",@progbits,1";
     PrivateGlobalPrefix = ".L";
     WeakRefDirective = "\t.weak\t";
     SetDirective = "\t.set\t";