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C++/C#: Make AliasedUse access only non-local memory

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The `AliasedUse` instruction is supposed to represent future uses of aliased memory after the function returns. Since local variables from that function are no longer allocated after the function returns, the `AliasedUse` instruction should access only the set of aliased locations that does not include locals from the current stack frame.
This commit is contained in:
Dave Bartolomeo
2019-10-25 13:10:39 -07:00
parent 1223388ab6
commit 56cbd0c152
9 changed files with 66 additions and 9 deletions
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8
cpp/ql/test/library-tests/ir/ssa/aliased_ssa_ir.expected
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@@ -340,7 +340,7 @@ ssa.cpp:
# 98| v0_19(void) = NoOp :
# 95| v0_20(void) = ReturnVoid :
# 95| v0_21(void) = UnmodeledUse : mu*
# 95| v0_22(void) = AliasedUse : ~m0_18
# 95| v0_22(void) = AliasedUse : ~m0_15
# 95| v0_23(void) = ExitFunction :
# 100| void MustTotallyOverlap(Point)
@@ -396,7 +396,7 @@ ssa.cpp:
# 109| v0_25(void) = NoOp :
# 105| v0_26(void) = ReturnVoid :
# 105| v0_27(void) = UnmodeledUse : mu*
# 105| v0_28(void) = AliasedUse : ~m0_24
# 105| v0_28(void) = AliasedUse : ~m0_21
# 105| v0_29(void) = ExitFunction :
# 111| void MayPartiallyOverlap(int, int)
@@ -468,7 +468,7 @@ ssa.cpp:
# 120| v0_33(void) = NoOp :
# 116| v0_34(void) = ReturnVoid :
# 116| v0_35(void) = UnmodeledUse : mu*
# 116| v0_36(void) = AliasedUse : ~m0_32
# 116| v0_36(void) = AliasedUse : ~m0_29
# 116| v0_37(void) = ExitFunction :
# 122| void MergeMustExactlyOverlap(bool, int, int)
@@ -865,5 +865,5 @@ ssa.cpp:
# 207| r0_23(glval<int>) = VariableAddress[#return] :
# 207| v0_24(void) = ReturnValue : &:r0_23, m0_22
# 207| v0_25(void) = UnmodeledUse : mu*
# 207| v0_26(void) = AliasedUse : ~m0_18
# 207| v0_26(void) = AliasedUse : ~m0_1
# 207| v0_27(void) = ExitFunction :