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Scott Owens 14a8ae34b9 [sledge sem] Improve and unify treatment of Exit ... Summary: Add an argument to the Exit instruction. Update the LLVM semantics to execute the Exit instruction and store the result in an "exited" component of the state. (Previously it just noticed that it was stuck about to do an Exit.) With exiting treated uniformly, now in the proof that for every LLVM trace, there is a llair trace that simulates it, all of the cheats except for 1 are just cases that I haven't got to yet. However, the last cheat is for the situation where the LLVM program gets stuck and the llair program doesn't. For example, the following two line LLVM program gets stuck because r2 is not assigned (ignoring for the moment the static restriction that LLVM is in SSA form). r1 := r2 Exit(0) The compilation to llair omits the assignment and so we get a llair program that doesn't get stuck: Exit(0) The key question is whether the static restrictions are sufficient to ensure that no expression that might be omitted can get stuck. Reviewed By: jberdine Differential Revision: D17737589 fbshipit-source-id: bc6c01a1b		5 years ago
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.gitignore	Definie a prelim. AST for llair's semantics	5 years ago
Holmakefile	[sledge sem] Add top-level llair semantics	5 years ago
llairScript.sml	[sledge sem] Improve and unify treatment of Exit	5 years ago
llair_propScript.sml	[sledge sem] Sketch out translation correctness	5 years ago
llvmScript.sml	[sledge sem] Improve and unify treatment of Exit	5 years ago
llvm_propScript.sml	[sledge sem] Improve and unify treatment of Exit	5 years ago
llvm_ssaScript.sml	[sledge sem] Improve and unify treatment of Exit	5 years ago
llvm_to_llairScript.sml	[sledge sem] Improve and unify treatment of Exit	5 years ago
llvm_to_llair_propScript.sml	[sledge sem] Improve and unify treatment of Exit	5 years ago
memory_modelScript.sml	[sledge sem] Start sketching translation correctness	5 years ago
miscScript.sml	[sledge sem] Improve and unify treatment of Exit	5 years ago
settingsScript.sml	[sledge sem] Refactor the way LLVM sem. does phis	5 years ago