[llvm-bugs] [Bug 35582] New: int_fast16_t etc. are suboptimal on WebAssembly

via llvm-bugs llvm-bugs at lists.llvm.org
Fri Dec 8 16:17:12 PST 2017


            Bug ID: 35582
           Summary: int_fast16_t etc. are suboptimal on WebAssembly
           Product: clang
           Version: unspecified
          Hardware: Other
                OS: other
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: dan433584 at gmail.com
                CC: llvm-bugs at lists.llvm.org

clang's wasm target defines __INT_FAST16_TYPE__ as "short", which is a 16-bit
type. WebAssembly doesn't have a 16-bit type, so 32-bit operations are
sometimes slightly faster.

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