diff options
Diffstat (limited to 'llvm/docs/CodeGenerator.rst')
| -rw-r--r-- | llvm/docs/CodeGenerator.rst | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/llvm/docs/CodeGenerator.rst b/llvm/docs/CodeGenerator.rst index 090273524f2..60048df010d 100644 --- a/llvm/docs/CodeGenerator.rst +++ b/llvm/docs/CodeGenerator.rst @@ -2075,7 +2075,8 @@ Tail call optimization ---------------------- Tail call optimization, callee reusing the stack of the caller, is currently -supported on x86/x86-64 and PowerPC. It is performed if: +supported on x86/x86-64, PowerPC, and WebAssembly. It is performed on x86/x86-64 +and PowerPC if: * Caller and callee have the calling convention ``fastcc``, ``cc 10`` (GHC calling convention) or ``cc 11`` (HiPE calling convention). @@ -2103,6 +2104,10 @@ PowerPC constraints: * On ppc32/64 GOT/PIC only module-local calls (visibility = hidden or protected) are supported. +On WebAssembly, tail calls are lowered to ``return_call`` and +``return_call_indirect`` instructions whenever the 'tail-call' target attribute +is enabled. + Example: Call as ``llc -tailcallopt test.ll``. |
