3 Commits

Author	SHA1	Message	Date
Jessica Paquette	ceb801612a	[AArch64] Don't generate libcalls for wide shifts on Darwin ... Similar to cff90f07cb. Darwin doesn't always use compiler-rt, and so we can't assume that these functions are available (at least on arm64).	2020-01-10 15:58:51 -08:00
Hans Wennborg	cff90f07cb	[SelectionDAG] Don't generate libcalls for wide shifts on Windows (PR42711) ... Neither libgcc or compiler-rt are usually used on Windows, so these functions can't be called. Differential revision: https://reviews.llvm.org/D66880 llvm-svn: 370204	2019-08-28 13:55:10 +00:00
Sjoerd Meijer	f7cc34cae8	[SelectionDAG] Codesize: don't expand SHIFT to SHIFT_PARTS ... And instead just generate a libcall. My motivating example on ARM was a simple: shl i64 %A, %B for which the code bloat is quite significant. For other targets that also accept __int128/i128 such as AArch64 and X86, it is also beneficial for these cases to generate a libcall when optimising for minsize. On these 64-bit targets, the 64-bits shifts are of course unaffected because the SHIFT/SHIFT_PARTS lowering operation action is not set to custom/expand. Differential Revision: https://reviews.llvm.org/D57386 llvm-svn: 352736	2019-01-31 08:07:30 +00:00