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author | Jiangning Liu <jiangning.liu@arm.com> | 2014-05-15 23:45:42 +0000 |
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committer | Jiangning Liu <jiangning.liu@arm.com> | 2014-05-15 23:45:42 +0000 |
commit | d5db8765d61ca77a55867cf1f39aecb8cae3a6cd (patch) | |
tree | fd12d05d5eac5450fa954c2aee66443a36a82df2 /lib/CodeGen/AsmPrinter | |
parent | 01a02d91dcb47cdc31fe6570f59eac3740d3da0e (diff) | |
download | llvm-d5db8765d61ca77a55867cf1f39aecb8cae3a6cd.tar.gz llvm-d5db8765d61ca77a55867cf1f39aecb8cae3a6cd.tar.bz2 llvm-d5db8765d61ca77a55867cf1f39aecb8cae3a6cd.tar.xz |
Implement global merge optimization for global variables.
This commit implements two command line switches -global-merge-on-external
and -global-merge-aligned, and both of them are false by default, so this
optimization is disabled by default for all targets.
For ARM64, some back-end behaviors need to be tuned to get this optimization
further enabled.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208934 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/AsmPrinter')
-rw-r--r-- | lib/CodeGen/AsmPrinter/AsmPrinter.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp index 37a2c3220c..0c4865f2f2 100644 --- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp +++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp @@ -946,8 +946,11 @@ bool AsmPrinter::doFinalization(Module &M) { EmitVisibility(Name, Alias.getVisibility()); // Emit the directives as assignments aka .set: - OutStreamer.EmitAssignment(Name, - MCSymbolRefExpr::Create(Target, OutContext)); + const MCExpr *Expr = MCSymbolRefExpr::Create(Target, OutContext); + if (uint64_t Offset = Alias.calculateOffset(*TM.getDataLayout())) + Expr = MCBinaryExpr::CreateAdd(Expr, + MCConstantExpr::Create(Offset, OutContext), OutContext); + OutStreamer.EmitAssignment(Name, Expr); } } |