[llvm] AMDGPU GlobalISel Add64 support (PR #124763)

[Alan Li via llvm-commits]

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@@ -1,42 +1,59 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
 ; RUN: llc -mtriple=amdgcn -mcpu=gfx940 -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
 
 define i64 @lshl_add_u64_v1v(i64 %v, i64 %a) {
 ; GCN-LABEL: lshl_add_u64_v1v:
-; GCN: v_lshl_add_u64 v[{{[0-9:]+}}], v[{{[0-9:]+}}], 1, v[{{[0-9:]+}}]
+; GCN:       ; %bb.0:
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    v_lshl_add_u64 v[0:1], v[0:1], 1, v[2:3]
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lialan wrote:

Added tests for global-isel. Confirmed the patch emits new pattern.

https://github.com/llvm/llvm-project/pull/124763