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2 Commits

Author SHA1 Message Date
Kyle Butt
546c8eba34 Codegen: Fix broken assumption in Tail Merge. 
Tail merge was making the assumption that a layout successor or
predecessor was always a cfg successor/predecessor. Remove that
assumption. Changes to tests are necessary because the errant cfg edges
were preventing optimizations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273700 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-06-24 18:16:36 +00:00
Jakob Stoklund Olesen
2d81106fa0 Handle bundled terminators in isBlockOnlyReachableByFallthrough. 
Targets like SPARC and MIPS have delay slots and normally bundle the
delay slot instruction with the corresponding terminator.

Teach isBlockOnlyReachableByFallthrough to find any MBB operands on
bundled terminators so SPARC doesn't need to specialize this function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199061 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-01-12 19:24:08 +00:00