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Fix miscompile due to SSA aliasing #3775

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Merged
Stefan J. Wernli (swernli) merged 4 commits into from
Oct 2, 2026
+1,518 −278
Merged

Fix miscompile due to SSA aliasing #3775

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ce9b0b6
Fix miscompile due to SSA aliasing
swernli Oct 1, 2026
07e4bfc
Update naming
swernli Oct 1, 2026
991a9bc
Fix bugs across blocks, also more verbose loads/stores
swernli Oct 1, 2026
eb677c1
improve handling of shallow links and phi generation
swernli Oct 2, 2026
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7 changes: 5 additions & 2 deletions source/compiler/qsc/src/codegen/tests.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -6030,6 +6030,7 @@ fn array_with_dynamic_contents_passed_as_argument_with_static_index_does_not_emi
block_0:
%var_2 = alloca i64
%var_5 = alloca i64
%var_8 = alloca i64
call void @__quantum__rt__initialize(ptr null)
call void @__quantum__qis__m__body(ptr inttoptr (i64 0 to ptr), ptr inttoptr (i64 0 to ptr))
%var_0 = call i1 @__quantum__rt__read_result(ptr inttoptr (i64 0 to ptr))
Expand All @@ -6051,8 +6052,10 @@ fn array_with_dynamic_contents_passed_as_argument_with_static_index_does_not_emi
store i64 0, ptr %var_5
br label %block_6
block_6:
%var_8 = load i64, ptr %var_2
call void @__quantum__rt__int_record_output(i64 %var_8, ptr @0)
%var_11 = load i64, ptr %var_2
store i64 %var_11, ptr %var_8
%var_13 = load i64, ptr %var_8
call void @__quantum__rt__int_record_output(i64 %var_13, ptr @0)
ret i64 0
}

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