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Start a very simple GVN pass (#79)

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* Skeleton simple_gvn pass.
* Basic testing infrastructure for simple-gvn.
* Add can_load and can_store flags to instructions.
* Move the replace_values function into the DataFlowGraph.
* Make InstructionData derive from Hash, PartialEq, and Eq.
* Make EntityList's hash and eq functions panic.
* Change Ieee32 and Ieee64 to store u32 and u64, respectively.
This commit is contained in:
Dan Gohman
2017-05-18 18:18:57 -07:00
committed by Jakob Stoklund Olesen
parent 0c7b2c7b68
commit dc809628f4
16 changed files with 256 additions and 57 deletions
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2
lib/cretonne/meta/gen_instr.py
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@@ -228,7 +228,7 @@ def gen_opcodes(groups, fmt):
fmt.doc_comment('An instruction opcode.')
fmt.doc_comment('')
fmt.doc_comment('All instructions from all supported ISAs are present.')
fmt.line('#[derive(Copy, Clone, PartialEq, Eq, Debug)]')
fmt.line('#[derive(Copy, Clone, PartialEq, Eq, Debug, Hash)]')
instrs = []
# We explicitly set the discriminant of the first variant to 1, which