[clang] [llvm] [AMDGPU] Split OPERAND_REG_IMM_INT64 into signed and unsigned variants (PR #186575)

[via cfe-commits]

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@@ -1,9 +1,12 @@
 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 3
 # RUN: llc -mtriple=amdgcn -mcpu=gfx900 -verify-machineinstrs -run-pass=si-fold-operands -o - %s | FileCheck -check-prefix=GCN %s
 
-# The constant is 0xffffffff80000000. It is 64-bit negative constant, but it passes the test
-# isInt<32>(). Nonetheless it is not a legal literal for a binary or unsigned operand and
-# cannot be used right in the shift as HW will zero extend it.
+# S_LSHL_B64 and S_ASHR_I64 use unsigned 64-bit operands (OPERAND_REG_IMM_B64).
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addmisol wrote:

Thanks for this pointer!
will change this

https://github.com/llvm/llvm-project/pull/186575