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interp: fix segmentation fault in some builds

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A call to .IsConstant() also returns true for constant globals, not just
constant expressions. Do an extra check that we're really operating on a
constant expression.
This commit is contained in:
Ayke van Laethem
2019-04-10 16:42:44 +02:00
committed by Ron Evans
parent 2e926789f5
commit f967c6919a
1 changed files with 1 additions and 1 deletions
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interp/frame.go
+1 -1
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@@ -95,7 +95,7 @@ func (fr *frame) evalBasicBlock(bb, incoming llvm.BasicBlock, indent string) (re
case !inst.IsALoadInst().IsNil():
operand := fr.getLocal(inst.Operand(0)).(*LocalValue)
var value llvm.Value
if !operand.IsConstant() || inst.IsVolatile() || operand.Underlying.Opcode() == llvm.BitCast {
if !operand.IsConstant() || inst.IsVolatile() || (!operand.Underlying.IsAConstantExpr().IsNil() && operand.Underlying.Opcode() == llvm.BitCast) {
value = fr.builder.CreateLoad(operand.Value(), inst.Name())
} else {
value = operand.Load()