[llvm] 3cb2346 - [AArch64] Support .arch_extension pan

[Roland McGrath via llvm-commits]

Author: Roland McGrath
Date: 2021-03-24T11:29:22-07:00
New Revision: 3cb2346982399892eae36e660ffa7e77a27ee067

URL: https://github.com/llvm/llvm-project/commit/3cb2346982399892eae36e660ffa7e77a27ee067
DIFF: https://github.com/llvm/llvm-project/commit/3cb2346982399892eae36e660ffa7e77a27ee067.diff

LOG: [AArch64] Support .arch_extension pan

This makes the behavior consistent with the GNU assembler.

Reviewed By: phosek

Differential Revision: https://reviews.llvm.org/D99209

Added: 
    

Modified: 
    llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
    llvm/test/MC/AArch64/directive-arch_extension.s

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
index e495003e3972..9141e786977a 100644
--- a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
+++ b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
@@ -2906,6 +2906,7 @@ static const struct Extension {
     {"mte", {AArch64::FeatureMTE}},
     {"memtag", {AArch64::FeatureMTE}},
     {"tlb-rmi", {AArch64::FeatureTLB_RMI}},
+    {"pan", {AArch64::FeaturePAN}},
     {"pan-rwv", {AArch64::FeaturePAN_RWV}},
     {"ccpp", {AArch64::FeatureCCPP}},
     {"rcpc", {AArch64::FeatureRCPC}},
@@ -2921,7 +2922,6 @@ static const struct Extension {
     {"pauth", {AArch64::FeaturePAuth}},
     {"flagm", {AArch64::FeatureFlagM}},
     // FIXME: Unsupported extensions
-    {"pan", {}},
     {"lor", {}},
     {"rdma", {}},
     {"profile", {}},

diff  --git a/llvm/test/MC/AArch64/directive-arch_extension.s b/llvm/test/MC/AArch64/directive-arch_extension.s
index 8cf2acd509b1..064c89ace652 100644
--- a/llvm/test/MC/AArch64/directive-arch_extension.s
+++ b/llvm/test/MC/AArch64/directive-arch_extension.s
@@ -56,6 +56,10 @@ irg x0, x1
 tlbi vmalle1os
 // CHECK: tlbi vmalle1os
 
+.arch_extension pan
+mrs x0, pan
+// CHECK: mrs x0, PAN
+
 .arch_extension pan-rwv
 at s1e1wp, x2
 // CHECK: at s1e1wp, x2