4 Commits

Author	SHA1	Message	Date
Chris Bieneman	abdea268c1	[IPSCCP] Remove calls without side effects ... Summary: When performing constant propagation for call instructions we have historically replaced all uses of the return from a call, but not removed the call itself. This is required for correctness if the calls have side effects, however the compiler should be able to safely remove calls that don't have side effects. This allows the compiler to completely fold away calls to functions that have no side effects if the inputs are constant and the output can be determined at compile time. Reviewers: davide, sanjoy, bruno, dberlin Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D38856 llvm-svn: 322125	2018-01-09 21:58:46 +00:00
Bill Wendling	a032374ea0	Use references to attribute groups on the call/invoke instructions. ... Listing all of the attributes for the callee of a call/invoke instruction is way too much and makes the IR unreadable. Use references to attributes instead. llvm-svn: 175877	2013-02-22 09:09:42 +00:00
Bill Wendling	90bc19cd91	Modify the LLVM assembly output so that it uses references to represent function attributes. ... This makes the LLVM assembly look better. E.g.: define void @foo() #0 { ret void } attributes #0 = { nounwind noinline ssp } llvm-svn: 175605	2013-02-20 07:21:42 +00:00
Dan Gohman	1f522d98f8	Fix a use of an invalidated iterator in the case where there are multiple ... adjacent uses of a dead basic block from the same user. This fixes PR5596. llvm-svn: 89658	2009-11-23 16:13:39 +00:00