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| author | Eli Friedman <eli.friedman@gmail.com> | 2011-05-27 22:13:20 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2011-05-27 22:13:20 +0000 |
| commit | b0dd6702ab5e7f53a4bdab5a3371285ad2a4b20b (patch) | |
| tree | a3bb3f91414c8ea38818b41207cfbe931a7d3e29 | |
| parent | addd80d1c80d1e9f249988452103c93a564945f0 (diff) | |
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 .
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@132223 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/CodeGenModule.cpp | 1 | ||||
| -rw-r--r-- | test/CodeGen/string-literal.c | 4 |
2 files changed, 3 insertions, 2 deletions
diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp index 987ebffd97..de11a29f67 100644 --- a/lib/CodeGen/CodeGenModule.cpp +++ b/lib/CodeGen/CodeGenModule.cpp @@ -1899,6 +1899,7 @@ static llvm::Constant *GenerateStringLiteral(llvm::StringRef str, new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, llvm::GlobalValue::PrivateLinkage, C, GlobalName); + GV->setAlignment(1); GV->setUnnamedAddr(true); return GV; } diff --git a/test/CodeGen/string-literal.c b/test/CodeGen/string-literal.c index 6d02b0fdaf..b5fa345bad 100644 --- a/test/CodeGen/string-literal.c +++ b/test/CodeGen/string-literal.c @@ -8,9 +8,9 @@ int main() { // 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"; } |