Author: pooja2299 Date: 2021-08-17T17:14:57+05:30 New Revision: 943ed5c6b95054c7efecf2b3d4b4df069907f4dc
URL: https://github.com/llvm/llvm-project/commit/943ed5c6b95054c7efecf2b3d4b4df069907f4dc DIFF: https://github.com/llvm/llvm-project/commit/943ed5c6b95054c7efecf2b3d4b4df069907f4dc.diff LOG: [docs][GlobalISel]Adding info for G_JUMP_TABLE generic opcode Added description of jump table and G_JUMP_TABLE opcode. Differential Revision: https://reviews.llvm.org/D107630 Added: Modified: llvm/docs/GlobalISel/GenericOpcode.rst Removed: ################################################################################ diff --git a/llvm/docs/GlobalISel/GenericOpcode.rst b/llvm/docs/GlobalISel/GenericOpcode.rst index 5f1ac067d9f90..899aa06fd0699 100644 --- a/llvm/docs/GlobalISel/GenericOpcode.rst +++ b/llvm/docs/GlobalISel/GenericOpcode.rst @@ -798,9 +798,19 @@ Indirect branch to jump table entry G_JUMP_TABLE ^^^^^^^^^^^^ -.. caution:: +Generates a pointer to the address of the jump table specified by the source +operand. The source operand is a jump table index. A jump table is an array +of addresses the CPU should jump to based on certain conditions. +G_JUMP_TABLE can be used in conjunction with G_BRJT to support jump table +codegen with GlobalISel. + +.. code-block:: none + + %dst:_(p0) = G_JUMP_TABLE %jump-table.0 + +The above example generates a pointer to the source jump table index. Source +operand must be a jump table index. - I found no documentation for this instruction at the time of writing. G_INTRINSIC, G_INTRINSIC_W_SIDE_EFFECTS ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
