Hi, Could a gatekeeper please review the following changes, which would fix cmake build under Open64?
The hyperblock scheduler makes the following transformation, which is
incorrect in 64 bit mode.
From:
addl $1,%edx
movsbl 0(%rdx,%r9,1), %eax
To:
movsbl 1(%rdx,%r9,1), %eax
addl $1,%edx
In the test environment $edx value is initially -1 and the address computed
for movsbl would have been 0+0+r9*1. With the above optimization, the address
computed is 1+0xffff+$r9*1 which is incorrect. The fix disallows the above
transformation in 64 bit mode when add is a 32 bit instruction.
Regards,
Shivaram
bug978.patch
Description: bug978.patch
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