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29 lines
1.1 KiB
Diff
29 lines
1.1 KiB
Diff
Pull in r199186 from upstream llvm trunk (by Jakob Stoklund Olesen):
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Switch the NEON register class from QPR to DPair.
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The already allocatable DPair superclass contains odd-even D register
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pair in addition to the even-odd pairs in the QPR register class. There
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is no reason to constrain the set of D register pairs that can be used
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for NEON values. Any NEON instructions that require a Q register will
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automatically constrain the register class to QPR.
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The allocation order for DPair begins with the QPR registers, so
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register allocation is unlikely to change much.
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Introduced here: http://svnweb.freebsd.org/changeset/base/262261
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Index: lib/Target/ARM/ARMISelLowering.cpp
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===================================================================
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--- lib/Target/ARM/ARMISelLowering.cpp
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+++ lib/Target/ARM/ARMISelLowering.cpp
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@@ -156,7 +156,7 @@ void ARMTargetLowering::addDRTypeForNEON(MVT VT) {
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}
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void ARMTargetLowering::addQRTypeForNEON(MVT VT) {
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- addRegisterClass(VT, &ARM::QPRRegClass);
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+ addRegisterClass(VT, &ARM::DPairRegClass);
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addTypeForNEON(VT, MVT::v2f64, MVT::v4i32);
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}
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