[all-commits] [llvm/llvm-project] 8d5209: [X86] Use indirect addressing for high 2GB of x32 ...

[Harald van Dijk via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8d520973b02b56fe75b9f916601dc1287a4cb17d
      https://github.com/llvm/llvm-project/commit/8d520973b02b56fe75b9f916601dc1287a4cb17d
  Author: Harald van Dijk <harald at gigawatt.nl>
  Date:   2023-10-11 (Wed, 11 Oct 2023)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
    M llvm/test/CodeGen/X86/large-constants-x32.ll

  Log Message:
  -----------
  [X86] Use indirect addressing for high 2GB of x32 address space

Instructions that take immediate addresses sign-extend their operands, so cannot be used when we actually need zero extension. Use indirect addressing to avoid problems.

The functions in the test are a modified versions of the functions by the same names in large-constants.ll, with i64 types changed to i32.

Fixes #55061

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D124406