[clang] [llvm] [clang][llvm][aarch64] Add aarch64_sme_in_streaming_mode intrinsic (PR #120265)

[Sander de Smalen via llvm-commits]

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@@ -0,0 +1,44 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sme -verify-machineinstrs < %s | FileCheck %s
+
+
+define i1 @streaming_mode_st_compatible() #0 {
+; CHECK-LABEL: streaming_mode_st_compatible:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    str x30, [sp, #-16]! // 8-byte Folded Spill
+; CHECK-NEXT:    bl __arm_sme_state
+; CHECK-NEXT:    and w0, w0, #0x1
+; CHECK-NEXT:    ldr x30, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    ret
+  %mode = tail call noundef i1 @llvm.aarch64.sme.in.streaming.mode()
+  ret i1 %mode
+}
+
+define i1 @streaming_mode_st_enabled() #1 {
+; CHECK-LABEL: streaming_mode_st_enabled:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    str x30, [sp, #-16]! // 8-byte Folded Spill
+; CHECK-NEXT:    bl __arm_sme_state
+; CHECK-NEXT:    and w0, w0, #0x1
+; CHECK-NEXT:    ldr x30, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    ret
+  %mode = tail call noundef i1 @llvm.aarch64.sme.in.streaming.mode()
+  ret i1 %mode
+}
+
+define i1 @streaming_mode_st_disabled() #2 {
+; CHECK-LABEL: streaming_mode_st_disabled:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    str x30, [sp, #-16]! // 8-byte Folded Spill
+; CHECK-NEXT:    bl __arm_sme_state
+; CHECK-NEXT:    and w0, w0, #0x1
+; CHECK-NEXT:    ldr x30, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    ret
+  %mode = tail call noundef i1 @llvm.aarch64.sme.in.streaming.mode()
+  ret i1 %mode
+}
+
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sdesmalen-arm wrote:

I don't think these two tests are relevant. The generated code should always be the same, because the intrinsic should have been folded away by the time it gets to CodeGen.

https://github.com/llvm/llvm-project/pull/120265