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compiler: Support bitcasting non-integers

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This commit is contained in:
Ayke van Laethem
2018-04-27 00:59:27 +02:00
parent bddb0c49b2
commit f7c2d0124d
1 changed files with 4 additions and 2 deletions
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tgo.go
+4 -2
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@@ -1030,14 +1030,16 @@ func (c *Compiler) parseConvert(frame *Frame, typeTo types.Type, x ssa.Value) (l
} }
sizeTo := c.targetData.TypeAllocSize(llvmTypeTo) sizeTo := c.targetData.TypeAllocSize(llvmTypeTo)
if sizeFrom == sizeTo {
return c.builder.CreateBitCast(value, llvmTypeTo, ""), nil
}
if typeTo.Info() & types.IsInteger == 0 { // if not integer if typeTo.Info() & types.IsInteger == 0 { // if not integer
return llvm.Value{}, errors.New("todo: convert: extend non-integer type") return llvm.Value{}, errors.New("todo: convert: extend non-integer type")
} }
if sizeFrom > sizeTo { if sizeFrom > sizeTo {
return c.builder.CreateTrunc(value, llvmTypeTo, ""), nil return c.builder.CreateTrunc(value, llvmTypeTo, ""), nil
} else if sizeFrom == sizeTo {
return c.builder.CreateBitCast(value, llvmTypeTo, ""), nil
} else if typeTo.Info() & types.IsUnsigned != 0 { // if unsigned } else if typeTo.Info() & types.IsUnsigned != 0 { // if unsigned
return c.builder.CreateZExt(value, llvmTypeTo, ""), nil return c.builder.CreateZExt(value, llvmTypeTo, ""), nil
} else { // if signed } else { // if signed