[llvm] [AMDGPU] - Add s_bitreplicate intrinsic (PR #69209)

[Jay Foad via llvm-commits]

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@@ -0,0 +1,45 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
+; RUN: llc -march=amdgcn -mcpu=gfx1100 -amdgpu-enable-delay-alu=0 -global-isel=1 -verify-machineinstrs < %s | FileCheck  -check-prefixes=GFX11 %s
+; RUN: llc -march=amdgcn -mcpu=gfx1100 -amdgpu-enable-delay-alu=0 -global-isel=0 -verify-machineinstrs < %s | FileCheck  -check-prefixes=GFX11 %s
+
+declare i64 @llvm.amdgcn.s.bitreplicate(i32)
+
+define i64 @test_s_bitreplicate_constant() {
+; GFX11-LABEL: test_s_bitreplicate_constant:
+; GFX11:       ; %bb.0: ; %entry
+; GFX11-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT:    s_bitreplicate_b64_b32 s[0:1], 0x85fe3a92
+; GFX11-NEXT:    v_dual_mov_b32 v0, s0 :: v_dual_mov_b32 v1, s1
+; GFX11-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  %br = call i64 @llvm.amdgcn.s.bitreplicate(i32 u0x85FE3A92)
+  ret i64 %br
+}
+
+define amdgpu_cs void @test_s_bitreplicate_sgpr(i32 inreg %mask, ptr addrspace(1) %out) {
+; GFX11-LABEL: test_s_bitreplicate_sgpr:
+; GFX11:       ; %bb.0: ; %entry
+; GFX11-NEXT:    s_bitreplicate_b64_b32 s[0:1], s0
+; GFX11-NEXT:    v_dual_mov_b32 v3, s1 :: v_dual_mov_b32 v2, s0
+; GFX11-NEXT:    global_store_b64 v[0:1], v[2:3], off
+; GFX11-NEXT:    s_nop 0
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+entry:
+  %br = call i64 @llvm.amdgcn.s.bitreplicate(i32 %mask)
+  store i64 %br, ptr addrspace(1) %out
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jayfoad wrote:

Thanks for explaining. I had not noticed that this test uses `amdgpu_cs` and the others do not.

https://github.com/llvm/llvm-project/pull/69209