Author: efriedma
Date: Fri May 27 17:13:20 2011
New Revision: 132223
URL: http://llvm.org/viewvc/llvm-project?rev=132223&view=rev
Log:
Match llvm-gcc's string literals alignment by forcing alignment on string
literals to 1. This can significantly impact the size of the string data, and
as far as I know, the alignment doesn't help performance. rdar://9078969 .
Modified:
cfe/trunk/lib/CodeGen/CodeGenModule.cpp
cfe/trunk/test/CodeGen/string-literal.c
Modified: cfe/trunk/lib/CodeGen/CodeGenModule.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenModule.cpp?rev=132223&r1=132222&r2=132223&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CodeGenModule.cpp (original)
+++ cfe/trunk/lib/CodeGen/CodeGenModule.cpp Fri May 27 17:13:20 2011
@@ -1899,6 +1899,7 @@
new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant,
llvm::GlobalValue::PrivateLinkage,
C, GlobalName);
+ GV->setAlignment(1);
GV->setUnnamedAddr(true);
return GV;
}
Modified: cfe/trunk/test/CodeGen/string-literal.c
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/string-literal.c?rev=132223&r1=132222&r2=132223&view=diff
==============================================================================
--- cfe/trunk/test/CodeGen/string-literal.c (original)
+++ cfe/trunk/test/CodeGen/string-literal.c Fri May 27 17:13:20 2011
@@ -8,9 +8,9 @@
// CHECK: internal constant [10 x i8] c"\E1\84\A0\C8\A0\F4\82\80\B0\00",
align 1
char b[10] = "\u1120\u0220\U00102030";
- // CHECK: private unnamed_addr constant [12 x i8]
c"A\00\00\00B\00\00\00\00\00\00\00"
+ // CHECK: private unnamed_addr constant [12 x i8]
c"A\00\00\00B\00\00\00\00\00\00\00", align 1
void *foo = L"AB";
- // CHECK: private unnamed_addr constant [12 x i8]
c"4\12\00\00\0B\F0\10\00\00\00\00\00"
+ // CHECK: private unnamed_addr constant [12 x i8]
c"4\12\00\00\0B\F0\10\00\00\00\00\00", align 1
void *bar = L"\u1234\U0010F00B";
}
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