diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPC.td | 6 | ||||
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCISelLowering.cpp | 3 | ||||
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCSubtarget.h | 2 |
3 files changed, 10 insertions, 1 deletions
diff --git a/llvm/lib/Target/PowerPC/PPC.td b/llvm/lib/Target/PowerPC/PPC.td index 1d5396912ef..266b5bf1ba5 100644 --- a/llvm/lib/Target/PowerPC/PPC.td +++ b/llvm/lib/Target/PowerPC/PPC.td @@ -166,6 +166,9 @@ def FeatureHTM : SubtargetFeature<"htm", "HasHTM", "true", "Enable Hardware Transactional Memory instructions">; def FeatureMFTB : SubtargetFeature<"", "FeatureMFTB", "true", "Implement mftb using the mfspr instruction">; +def FeatureUnalignedFloats : + SubtargetFeature<"allow-unaligned-fp-access", "AllowsUnalignedFPAccess", + "true", "CPU does not trap on unaligned FP access">; def FeaturePPCPreRASched: SubtargetFeature<"ppc-prera-sched", "UsePPCPreRASchedStrategy", "true", "Use PowerPC pre-RA scheduling strategy">; @@ -252,7 +255,8 @@ def ProcessorFeatures { FeatureExtDiv, FeatureMFTB, DeprecatedDST, - FeatureTwoConstNR]; + FeatureTwoConstNR, + FeatureUnalignedFloats]; list<SubtargetFeature> P7SpecificFeatures = []; list<SubtargetFeature> P7Features = !listconcat(P7InheritableFeatures, P7SpecificFeatures); diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp index fa0b9a0b7af..e6969ca8750 100644 --- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp +++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp @@ -15131,6 +15131,9 @@ bool PPCTargetLowering::allowsMisalignedMemoryAccesses(EVT VT, if (!VT.isSimple()) return false; + if (VT.isFloatingPoint() && !Subtarget.allowsUnalignedFPAccess()) + return false; + if (VT.getSimpleVT().isVector()) { if (Subtarget.hasVSX()) { if (VT != MVT::v2f64 && VT != MVT::v2i64 && diff --git a/llvm/lib/Target/PowerPC/PPCSubtarget.h b/llvm/lib/Target/PowerPC/PPCSubtarget.h index 6dff0c126ab..044e982740e 100644 --- a/llvm/lib/Target/PowerPC/PPCSubtarget.h +++ b/llvm/lib/Target/PowerPC/PPCSubtarget.h @@ -124,6 +124,7 @@ protected: bool IsPPC4xx; bool IsPPC6xx; bool FeatureMFTB; + bool AllowsUnalignedFPAccess; bool DeprecatedDST; bool HasLazyResolverStubs; bool IsLittleEndian; @@ -274,6 +275,7 @@ public: bool vectorsUseTwoUnits() const {return VectorsUseTwoUnits; } bool isE500() const { return IsE500; } bool isFeatureMFTB() const { return FeatureMFTB; } + bool allowsUnalignedFPAccess() const { return AllowsUnalignedFPAccess; } bool isDeprecatedDST() const { return DeprecatedDST; } bool hasICBT() const { return HasICBT; } bool hasInvariantFunctionDescriptors() const { |
