2 Commits

Author	SHA1	Message	Date
Bill Wendling	e31c05926b	Unify the lowering of arguments during SjLj prepare. ... The 'select true, %arg, undef' instruction can be used for both aggregate and non-aggregate arguments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212967 91177308-0d34-0410-b5e6-96231b3b80d8	2014-07-14 18:21:11 +00:00
Bill Wendling	5388e6f9b3	Support lowering of empty aggregates. ... This crash was pretty common while compiling Rust for iOS (armv7). Reason - SjLj preparation step was lowering aggregate arguments as ExtractValue + InsertValue. ExtractValue has assertion which checks that there is some data in value, which is not true in case of empty (no fields) structures. Rust uses them quite extensively so this patch uses a 'select true, %val, undef' instruction to lower the argument. Patch by Valerii Hiora. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212922 91177308-0d34-0410-b5e6-96231b3b80d8	2014-07-14 06:22:36 +00:00