[LLVMbugs] [Bug 18316] [powerpc-darwin][AsmPrinter] addis instruction expects 0 instead of r0

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18316

Hal Finkel <hfinkel at anl.gov> changed:

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

--- Comment #13 from Hal Finkel <hfinkel at anl.gov> ---
The ADDIS is coming from the regular add pattern:

ISEL: Starting pattern match on root node: 0x70b7480: i32 = add 0x70b4430,
0x70b2c70 [ORD=29] [ID=66]
...
  Morphed node: 0x70b7480: i32 = ADDIS 0x70b4430, 0x70b2170 [ORD=29]

which was:

              0x70b4430: i32 = PPCISD::GlobalBaseReg [ORD=29]

              0x70b2c70: i32 = PPCISD::Hi 0x70b2170, 0x70b4030 [ORD=29]

            0x70b7480: i32 = add 0x70b4430, 0x70b2c70 [ORD=29]

If we make sure to allocate the global base register from the non-r0 register
class, then this problem goes away ;) -- r203054.

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