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(parent: f4d4665) | patch
gcc seems to have taken to generating "orl $0xFFFFFFFF, %reg32" to get
authorJulian Seward <jseward@acm.org>
Mon, 26 Mar 2012 09:44:39 +0000 (09:44 +0000)
committerJulian Seward <jseward@acm.org>
Mon, 26 Mar 2012 09:44:39 +0000 (09:44 +0000)
commite9e213856dd52b9d69852d61e154f2152511af66
tree2e4d3fe82d20e8fd189d095a10e2efdfb00fe29ctree
parentf4d4665b99c0dd62c0dd442cb73544ddb91a0ee3commit | diff
gcc seems to have taken to generating "orl $0xFFFFFFFF, %reg32" to get
-1 (32-bit) into a register.  [Is this wise?  Does the processor know
that this generates no dependency on the previous value of the
register?]  Teach the constant folder about such cases, therefore.

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