[LLVMbugs] [Bug 21742] PowerPC cc clobber fails to clobber cr0

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Mon Dec 8 14:57:28 PST 2014


Hal Finkel <hfinkel at anl.gov> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #5 from Hal Finkel <hfinkel at anl.gov> ---
It seems that clobbering a non-allocatable register that aliases an allocatable
one is not really supported (I vaguely recall Andy and/or Jakob pointing this
out to me a long time ago in the context of the ctr-based loops design
discussion), so I implemented the 'cc' alias for 'cr0' directly within the
inline asm constraint-processing code. In short, r223708 should fix this.

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