llvm-project

Commit Graph

Author	SHA1	Message	Date
Dan Gohman	72a13d2476	Use opt -S instead of piping bitcode output through llvm-dis. llvm-svn: 81257	2009-09-08 22:34:10 +00:00
Dan Gohman	9737a63ed8	Change these tests to feed the assembly files to opt directly, instead of using llvm-as, now that opt supports this. llvm-svn: 81226	2009-09-08 16:50:01 +00:00
Dan Gohman	bc0278400c	Teach instcombine's visitLoad to scan back several instructions to find opportunities for store-to-load forwarding or load CSE, in the same way that visitStore scans back to do DSE. Also, define a new helper function for testing whether the addresses of two memory accesses are known to have the same value, and use it in both visitStore and visitLoad. These two changes allow instcombine to eliminate loads in code produced by front-ends that frequently emit obviously redundant addressing for memory references. llvm-svn: 57608	2008-10-15 23:19:35 +00:00

Author

SHA1

Message

Date

Dan Gohman

72a13d2476

Use opt -S instead of piping bitcode output through llvm-dis.

llvm-svn: 81257

2009-09-08 22:34:10 +00:00

Dan Gohman

9737a63ed8

Change these tests to feed the assembly files to opt directly, instead

of using llvm-as, now that opt supports this.

llvm-svn: 81226

2009-09-08 16:50:01 +00:00

Dan Gohman

bc0278400c

Teach instcombine's visitLoad to scan back several instructions

to find opportunities for store-to-load forwarding or load CSE,
in the same way that visitStore scans back to do DSE. Also, define
a new helper function for testing whether the addresses of two
memory accesses are known to have the same value, and use it in
both visitStore and visitLoad.

These two changes allow instcombine to eliminate loads in code
produced by front-ends that frequently emit obviously redundant
addressing for memory references.

llvm-svn: 57608

2008-10-15 23:19:35 +00:00

3 Commits