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authorJakob Stoklund Olesen <stoklund@2pi.dk>2011-05-03 22:31:24 +0000
committerJakob Stoklund Olesen <stoklund@2pi.dk>2011-05-03 22:31:24 +0000
commit2944b4fe059b727b1cbd2b85013610de137fac02 (patch)
tree9ffc381bf42a19fc4ba3911773826812dda7bb05 /test
parentfeaf34758ab7b4bf87ebc29f7381e536e7eb501d (diff)
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Mark ultra-super-registers QQQQ as call-clobbered instead of the D sub-registers.
LiveVariables doesn't understand that clobbering D0 and D1 completely overwrites Q0, so if Q0 is live-in to a function, its live range will extend beyond a function call that only clobbers D0 and D1. This shows up in the ARM/2009-11-01-NeonMoves test case. LiveVariables should probably implement the much stricter rules for physreg liveness that RAFast imposes - a physreg is killed by the first use of any alias. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130801 91177308-0d34-0410-b5e6-96231b3b80d8
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