Jakob Stoklund Olesen cf97036675 Also attempt trivial coalescing for live intervals that end in a copy. ...

The coalescer is supposed to clean these up, but when setting up parameters
for a function call, there may be copies to physregs. If the defining
instruction has been LICM'ed far away, the coalescer won't touch it.

The register allocation hint does not always work - when the register
allocator is backtracking, it clears the hints.

This patch is more conservative than r90502, and does not break
483.xalancbmk/i686. It still breaks the PowerPC bootstrap, so it is disabled
by default, and can be enabled with the -trivial-coalesce-ends option.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91049 91177308-0d34-0410-b5e6-96231b3b80d8

2009-12-10 17:48:32 +00:00

..

llvm

Also attempt trivial coalescing for live intervals that end in a copy.

2009-12-10 17:48:32 +00:00

llvm-c

I forgot to update the prototype for LLVMBuildIntCast when correcting

2009-11-23 10:49:03 +00:00