Displaying 2 results from an estimated 2 matches for "b2486".
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2486
2020 Jan 10
2
Register Dataflow Analysis on X86
...used about some of the behavior I'm seeing with the phi nodes that involve aggregate registers. Here is one example:
b1531: --- %bb.36 --- preds(2): %bb.35, %bb.128 succs(1): %bb.37
p3193: phi [+d3194<RBP>(,,u3211):, u3195<RBP>(+d3170,b1526):u1437, u3196<RBP>(d2141,b2486):u2324]
p3197: phi [+d3198<RBX>(,,u3216):, u3199<RBX>(+d3138,b1526):u1465, u3200<RBX>(+d3364,b2486):]
p3201: phi [+d3202<R12D>(,d1541,):, u3203<R12D>(+d3146,b1526):, u3204<R12D>(d1878,b2486):u3148]
p3205: phi [+d3206<#1073741833>(,d1551,u1552...
2019 Dec 23
2
Register Dataflow Analysis on X86
Hi Scott,
That #1073741833 is a register mask. They are treated as aggregate registers (essentially sets of registers), so if it includes R9D and R11D, it will be treated as being aliased with both.
These separate defs are there because they reach disjoint registers.
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Krzysztof Parzyszek kparzysz at quicinc.com<mailto:kparzysz at quicinc.com> AI tools development
From: Scott