llvm-project

Commit Graph

Author	SHA1	Message	Date
James Molloy	0f41227b21	[Thumb1] Teach optimizeCompareInstr about thumb1 compares This avoids us doing a completely unneeded "cmp r0, #0" after a flag-setting instruction if we only care about the Z or C flags. Add LSL/LSR to the whitelist while we're here and add testing. This code could really do with a spring clean. llvm-svn: 281027	2016-09-09 09:51:06 +00:00

Author

SHA1

Message

Date

James Molloy

0f41227b21

[Thumb1] Teach optimizeCompareInstr about thumb1 compares

This avoids us doing a completely unneeded "cmp r0, #0" after a flag-setting instruction if we only care about the Z or C flags.

Add LSL/LSR to the whitelist while we're here and add testing. This code could really do with a spring clean.

llvm-svn: 281027

2016-09-09 09:51:06 +00:00

1 Commits