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Author SHA1 Message Date
Reid Kleckner d0eda92845 Fix ARM intrinsics-overflow.ll test on Windows 
Windows on ARM only supports thumb mode execution, so we have to
explicitly pick some non-Windows OS to test ARM mode codegen.

llvm-svn: 208448
 2014-05-09 21:52:48 +00:00
Louis Gerbarg 3342bf1451 Add custom lowering for add/sub with overflow intrinsics to ARM 
This patch adds support to ARM for custom lowering of the
llvm.{u|s}add.with.overflow.i32 intrinsics for i32/i64. This is particularly useful
for handling idiomatic saturating math functions as generated by
InstCombineCompare.

Test cases included.

rdar://14853450

llvm-svn: 208435
 2014-05-09 17:02:49 +00:00