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author | Chris Lattner <sabre@nondot.org> | 2005-05-13 23:14:17 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2005-05-13 23:14:17 +0000 |
commit | a8217e3000b5b01c4a95316aef078a9d02a9a119 (patch) | |
tree | 4b8c4fb88b595338d5003fff450b70ae0cfc60bb /lib | |
parent | 0db07092a7aaeeaa0722799d9f533be3b782d362 (diff) | |
download | llvm-a8217e3000b5b01c4a95316aef078a9d02a9a119.tar.gz llvm-a8217e3000b5b01c4a95316aef078a9d02a9a119.tar.bz2 llvm-a8217e3000b5b01c4a95316aef078a9d02a9a119.tar.xz |
Align doubles on 8-byte boundaries if possible.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21993 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
-rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index e088845daa..d2cde34896 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -140,6 +140,15 @@ FunctionLoweringInfo::FunctionLoweringInfo(TargetLowering &tli, const Type *Ty = AI->getAllocatedType(); uint64_t TySize = TLI.getTargetData().getTypeSize(Ty); unsigned Align = TLI.getTargetData().getTypeAlignment(Ty); + + // If the alignment of the value is smaller than the size of the value, + // and if the size of the value is particularly small (<= 8 bytes), + // round up to the size of the value for potentially better performance. + // + // FIXME: This could be made better with a preferred alignment hook in + // TargetData. It serves primarily to 8-byte align doubles for X86. + if (Align < TySize && TySize <= 8) Align = TySize; + TySize *= CUI->getValue(); // Get total allocated size. StaticAllocaMap[AI] = MF.getFrameInfo()->CreateStackObject((unsigned)TySize, Align); |