[llvm-dev] LLVM type.h question (original) (raw)
Craig Topper via llvm-dev llvm-dev at lists.llvm.org
Sun May 3 16:45:42 PDT 2020
- Previous message: [llvm-dev] LLVM type.h question
- Next message: [llvm-dev] LLVM type.h question
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Isn't the SubclassData member a 24 bit bitfield? I think the truncation would happen on the assignment to it.
~Craig
On Sun, May 3, 2020 at 4:06 PM James Courtier-Dutton via llvm-dev < llvm-dev at lists.llvm.org> wrote:
Hi,
I see this in the Type class: unsigned getSubclassData() const { return SubclassData; } void setSubclassData(unsigned val) { SubclassData = val; // Ensure we don't have any accidental truncation. assert(getSubclassData() == val && "Subclass data too large for field"); } How will the assert ever get triggered? The type is "unsigned" so how can getSubclassData() ever not equal val ? Where does the truncation take place? Kind Regards James
LLVM Developers mailing list llvm-dev at lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20200503/9b20d7a0/attachment.html>
- Previous message: [llvm-dev] LLVM type.h question
- Next message: [llvm-dev] LLVM type.h question
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]