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The sparse data-flow analysis used for
copy elimination before this patch
could sometimes diverge. The core
reason for this behavior is that the
visitphi() function was not monotonic
in the following copy-of lattice:
top (represented as the temp
/ | \ itself)
x y z ...
\ | /
bot (represented as R)
This monotonicity defect could be
fixed by reverting
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| amd64 | ||
| arm64 | ||
| doc | ||
| minic | ||
| test | ||
| tools | ||
| .gitignore | ||
| .tag | ||
| alias.c | ||
| all.h | ||
| cfg.c | ||
| copy.c | ||
| fold.c | ||
| gas.c | ||
| LICENSE | ||
| live.c | ||
| load.c | ||
| main.c | ||
| Makefile | ||
| mem.c | ||
| ops.h | ||
| parse.c | ||
| README | ||
| rega.c | ||
| spill.c | ||
| ssa.c | ||
| util.c | ||
QBE - Backend Compiler http://c9x.me/compile/ doc/ Documentation. minic/ An example C frontend for QBE. tools/ Miscellaneous tools (testing). test/ Tests. amd64/ arm64/ Architecture-specific code. The LICENSE file applies to all files distributed. - Compilation Invoke GNU make in this directory to create the executable file obj/qbe. On some systems (BSD) you might have to use 'gmake' instead of 'make'.