[llvm] 842f7b0 - [AArch64] make +dit non-FMV-only (#90987)

[Tomas Matheson via llvm-commits]

Author: Tomas Matheson
Date: 2024-05-10T18:48:50+01:00
New Revision: 842f7b0fe7f70f5f66d925e57bab0123eedcc5d2

URL: https://github.com/llvm/llvm-project/commit/842f7b0fe7f70f5f66d925e57bab0123eedcc5d2
DIFF: https://github.com/llvm/llvm-project/commit/842f7b0fe7f70f5f66d925e57bab0123eedcc5d2.diff

LOG: [AArch64] make +dit non-FMV-only (#90987)

Required to fix an llvm-test-suite failure:

    error: expected writable system register or pstate: "msr DIT, x0"

Added: 
    

Modified: 
    llvm/lib/Target/AArch64/AArch64Features.td

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/AArch64/AArch64Features.td b/llvm/lib/Target/AArch64/AArch64Features.td
index 3425ac4133026..920ca7f4fbfcb 100644
--- a/llvm/lib/Target/AArch64/AArch64Features.td
+++ b/llvm/lib/Target/AArch64/AArch64Features.td
@@ -71,7 +71,6 @@ class FMVOnlyExtension<string FMVBit, string Name, string Deps, int Priority>
 }
 
 def : FMVOnlyExtension<"FEAT_DGH", "dgh", "", 260>;
-def : FMVOnlyExtension<"FEAT_DIT", "dit", "+dit", 180>;
 def : FMVOnlyExtension<"FEAT_DPB", "dpb", "+ccpp", 190>;
 def : FMVOnlyExtension<"FEAT_DPB2", "dpb2", "+ccpp,+ccdp", 200>;
 def : FMVOnlyExtension<"FEAT_EBF16", "ebf16", "+bf16", 290>;
@@ -455,9 +454,10 @@ def FeatureMPAM : SubtargetFeature<
     "mpam", "HasMPAM", "true",
     "Enable v8.4-A Memory system Partitioning and Monitoring extension (FEAT_MPAM)">;
 
-def FeatureDIT : SubtargetFeature<
-    "dit", "HasDIT", "true",
-    "Enable v8.4-A Data Independent Timing instructions (FEAT_DIT)">;
+def FeatureDIT : Extension<
+    "dit", "DIT",
+    "Enable v8.4-A Data Independent Timing instructions (FEAT_DIT)", [],
+    "FEAT_DIT", "+dit", 180>;
 
 def FeatureTRACEV8_4 : SubtargetFeature<
     "tracev8.4", "HasTRACEV8_4", "true",