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[SystemZ] Enable unaligned accesses

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The code to distinguish between unaligned and aligned addresses was
already there, so this is mostly just a switch-on-and-test process.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182920 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Sandiford
2013-05-30 09:45:42 +00:00
parent ccb7bd9d84
commit 14a926f13b
14 changed files with 397 additions and 5 deletions
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10
lib/Target/SystemZ/SystemZISelLowering.cpp
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@@ -253,6 +253,16 @@ bool SystemZTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
return Imm.isZero() || Imm.isNegZero();
}
bool SystemZTargetLowering::allowsUnalignedMemoryAccesses(EVT VT,
bool *Fast) const {
// Unaligned accesses should never be slower than the expanded version.
// We check specifically for aligned accesses in the few cases where
// they are required.
if (Fast)
*Fast = true;
return true;
}
//===----------------------------------------------------------------------===//
// Inline asm support
//===----------------------------------------------------------------------===//