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interp: make getelementptr offsets signed

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getelementptr offsets are signed, not unsigned. Yet they were used as
unsigned integers in interp.
Somehow this worked most of the time, until finally there was some code
that did a getelementptr with a negative index.
This commit is contained in:
Ayke van Laethem
2024-02-27 14:18:47 +01:00
committed by Ron Evans
parent 9951eb9990
commit 1f6d34d995
3 changed files with 14 additions and 5 deletions
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interp/testdata/basic.out.ll
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@@ -9,6 +9,8 @@ target triple = "x86_64--linux"
@main.exposedValue1 = global i16 0
@main.exposedValue2 = local_unnamed_addr global i16 0
@main.insertedValue = local_unnamed_addr global { i8, i32, { float, { i64, i16 } } } zeroinitializer
@main.gepArray = local_unnamed_addr global [8 x i8] zeroinitializer
@main.negativeGEP = global ptr getelementptr inbounds (i8, ptr @main.negativeGEP, i64 2)
declare void @runtime.printint64(i64) unnamed_addr