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/* @generated */
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digraph cfg {
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"div0_namespace_resolution#14165120127941064123.2433829c6d52c7e69a43e89e30e4c7fc_1" [label="1: Start div0_namespace_resolution\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 24, column 1]\n " color=yellow style=filled]
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"div0_namespace_resolution#14165120127941064123.2433829c6d52c7e69a43e89e30e4c7fc_1" -> "div0_namespace_resolution#14165120127941064123.2433829c6d52c7e69a43e89e30e4c7fc_3" ;
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"div0_namespace_resolution#14165120127941064123.2433829c6d52c7e69a43e89e30e4c7fc_2" [label="2: Exit div0_namespace_resolution \n " color=yellow style=filled]
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"div0_namespace_resolution#14165120127941064123.2433829c6d52c7e69a43e89e30e4c7fc_3" [label="3: Return Stmt \n n$0=_fun_f1::get() [line 24, column 47]\n n$1=_fun_f2::get() [line 24, column 59]\n *&return:int=(1 / (n$0 + n$1)) [line 24, column 35]\n " shape="box"]
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"div0_namespace_resolution#14165120127941064123.2433829c6d52c7e69a43e89e30e4c7fc_3" -> "div0_namespace_resolution#14165120127941064123.2433829c6d52c7e69a43e89e30e4c7fc_2" ;
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"div0_using#4232634229583313075.9331f51b08b546cc4cf3f4b4f22e46ff_1" [label="1: Start div0_using\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 19, column 1]\n " color=yellow style=filled]
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"div0_using#4232634229583313075.9331f51b08b546cc4cf3f4b4f22e46ff_1" -> "div0_using#4232634229583313075.9331f51b08b546cc4cf3f4b4f22e46ff_3" ;
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"div0_using#4232634229583313075.9331f51b08b546cc4cf3f4b4f22e46ff_2" [label="2: Exit div0_using \n " color=yellow style=filled]
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"div0_using#4232634229583313075.9331f51b08b546cc4cf3f4b4f22e46ff_3" [label="3: Return Stmt \n n$0=_fun_f1::get0() [line 21, column 14]\n *&return:int=(1 / n$0) [line 21, column 3]\n " shape="box"]
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"div0_using#4232634229583313075.9331f51b08b546cc4cf3f4b4f22e46ff_3" -> "div0_using#4232634229583313075.9331f51b08b546cc4cf3f4b4f22e46ff_2" ;
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"get#f1#11182918362941702717.40a87222281cbcdb639beb16ed92bf79_1" [label="1: Start f1::get\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 11, column 1]\n " color=yellow style=filled]
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"get#f1#11182918362941702717.40a87222281cbcdb639beb16ed92bf79_1" -> "get#f1#11182918362941702717.40a87222281cbcdb639beb16ed92bf79_3" ;
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"get#f1#11182918362941702717.40a87222281cbcdb639beb16ed92bf79_2" [label="2: Exit f1::get \n " color=yellow style=filled]
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"get#f1#11182918362941702717.40a87222281cbcdb639beb16ed92bf79_3" [label="3: Return Stmt \n *&return:int=1 [line 11, column 13]\n " shape="box"]
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"get#f1#11182918362941702717.40a87222281cbcdb639beb16ed92bf79_3" -> "get#f1#11182918362941702717.40a87222281cbcdb639beb16ed92bf79_2" ;
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"get#f2#4584566886545893232.5a8ac538c5463a04db693a70ff1f379b_1" [label="1: Start f2::get\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 16, column 1]\n " color=yellow style=filled]
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"get#f2#4584566886545893232.5a8ac538c5463a04db693a70ff1f379b_1" -> "get#f2#4584566886545893232.5a8ac538c5463a04db693a70ff1f379b_3" ;
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"get#f2#4584566886545893232.5a8ac538c5463a04db693a70ff1f379b_2" [label="2: Exit f2::get \n " color=yellow style=filled]
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"get#f2#4584566886545893232.5a8ac538c5463a04db693a70ff1f379b_3" [label="3: Return Stmt \n *&return:int=-1 [line 16, column 13]\n " shape="box"]
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"get#f2#4584566886545893232.5a8ac538c5463a04db693a70ff1f379b_3" -> "get#f2#4584566886545893232.5a8ac538c5463a04db693a70ff1f379b_2" ;
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"get0#f1#8249585443771353912.5f8dd295c37fb33ddae3c72efc338f89_1" [label="1: Start f1::get0\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 12, column 1]\n " color=yellow style=filled]
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"get0#f1#8249585443771353912.5f8dd295c37fb33ddae3c72efc338f89_1" -> "get0#f1#8249585443771353912.5f8dd295c37fb33ddae3c72efc338f89_3" ;
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"get0#f1#8249585443771353912.5f8dd295c37fb33ddae3c72efc338f89_2" [label="2: Exit f1::get0 \n " color=yellow style=filled]
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"get0#f1#8249585443771353912.5f8dd295c37fb33ddae3c72efc338f89_3" [label="3: Return Stmt \n *&return:int=0 [line 12, column 14]\n " shape="box"]
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"get0#f1#8249585443771353912.5f8dd295c37fb33ddae3c72efc338f89_3" -> "get0#f1#8249585443771353912.5f8dd295c37fb33ddae3c72efc338f89_2" ;
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"type_alias_div0#11064282270104671255.675c026241b82e6430f7456d997b57b4_1" [label="1: Start type_alias_div0\nFormals: \nLocals: x:int \n DECLARE_LOCALS(&return,&x); [line 38, column 1]\n " color=yellow style=filled]
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"type_alias_div0#11064282270104671255.675c026241b82e6430f7456d997b57b4_1" -> "type_alias_div0#11064282270104671255.675c026241b82e6430f7456d997b57b4_4" ;
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"type_alias_div0#11064282270104671255.675c026241b82e6430f7456d997b57b4_2" [label="2: Exit type_alias_div0 \n " color=yellow style=filled]
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"type_alias_div0#11064282270104671255.675c026241b82e6430f7456d997b57b4_3" [label="3: Return Stmt \n n$0=*&x:int [line 41, column 14]\n *&return:int=(1 / n$0) [line 41, column 3]\n " shape="box"]
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"type_alias_div0#11064282270104671255.675c026241b82e6430f7456d997b57b4_3" -> "type_alias_div0#11064282270104671255.675c026241b82e6430f7456d997b57b4_2" ;
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"type_alias_div0#11064282270104671255.675c026241b82e6430f7456d997b57b4_4" [label="4: DeclStmt \n *&x:int=0 [line 40, column 3]\n " shape="box"]
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"type_alias_div0#11064282270104671255.675c026241b82e6430f7456d997b57b4_4" -> "type_alias_div0#11064282270104671255.675c026241b82e6430f7456d997b57b4_3" ;
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"using_div0#15267107907897398237.0f32134dc9668df527885e12e16348fe_1" [label="1: Start using_div0\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 33, column 1]\n " color=yellow style=filled]
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"using_div0#15267107907897398237.0f32134dc9668df527885e12e16348fe_1" -> "using_div0#15267107907897398237.0f32134dc9668df527885e12e16348fe_3" ;
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"using_div0#15267107907897398237.0f32134dc9668df527885e12e16348fe_2" [label="2: Exit using_div0 \n " color=yellow style=filled]
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[clang] enforce that `instruction` always returns one SIL expression
Summary:
Previously, the type of `trans_result` contained a list of SIL expressions.
However, most of the time we expect to get exactly one, and getting a different
number is a soft(!) error, usually returning `-1`.
This splits `trans_result` into `control`, which contains the information
needed for temporary computation (hence when we don't necessarily know the
return value yet), and a new version of `trans_result` that includes `control`,
the previous `exps` list but replaced by a single `return` expression instead,
and a couple other values that made sense to move out of `control`. This allows
some flexibility in the frontend compared to enforcing exactly one return
expression always: if they are not known yet we stick to `control` instead (see
eg `compute_controls_to_parent`).
This creates more garbage temporary identifiers, however they do not show up in
the final cfg. Instead, we see that temporary IDs are now often not
consecutive...
The most painful complication is in the treatment of `DeclRefExpr`, which was
actually returning *two* expressions: the method name and the `this` object.
Now the method name is a separate (optional) field in `trans_result`.
Reviewed By: mbouaziz
Differential Revision: D7881088
fbshipit-source-id: 41ad3b5
7 years ago
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"using_div0#15267107907897398237.0f32134dc9668df527885e12e16348fe_3" [label="3: Return Stmt \n n$1=_fun_f3::C_ret_zero() [line 35, column 14]\n *&return:int=(1 / n$1) [line 35, column 3]\n " shape="box"]
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"using_div0#15267107907897398237.0f32134dc9668df527885e12e16348fe_3" -> "using_div0#15267107907897398237.0f32134dc9668df527885e12e16348fe_2" ;
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"ret_zero#C#f3#(14815103288805165028).4dbfdc84a3e84f15300709ed03f3f5c1_1" [label="1: Start f3::C_ret_zero\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 29, column 3]\n " color=yellow style=filled]
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"ret_zero#C#f3#(14815103288805165028).4dbfdc84a3e84f15300709ed03f3f5c1_1" -> "ret_zero#C#f3#(14815103288805165028).4dbfdc84a3e84f15300709ed03f3f5c1_3" ;
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"ret_zero#C#f3#(14815103288805165028).4dbfdc84a3e84f15300709ed03f3f5c1_2" [label="2: Exit f3::C_ret_zero \n " color=yellow style=filled]
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"ret_zero#C#f3#(14815103288805165028).4dbfdc84a3e84f15300709ed03f3f5c1_3" [label="3: Return Stmt \n *&return:int=0 [line 29, column 27]\n " shape="box"]
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"ret_zero#C#f3#(14815103288805165028).4dbfdc84a3e84f15300709ed03f3f5c1_3" -> "ret_zero#C#f3#(14815103288805165028).4dbfdc84a3e84f15300709ed03f3f5c1_2" ;
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}
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