[llvm] 2fb9029 - [PowerPC] Support hwsync extended mnemonic

[Nemanja Ivanovic via llvm-commits]

Author: Nemanja Ivanovic
Date: 2021-12-20T10:08:31-06:00
New Revision: 2fb9029f2678e3698de202fa88150b3b03cf76da

URL: https://github.com/llvm/llvm-project/commit/2fb9029f2678e3698de202fa88150b3b03cf76da
DIFF: https://github.com/llvm/llvm-project/commit/2fb9029f2678e3698de202fa88150b3b03cf76da.diff

LOG: [PowerPC] Support hwsync extended mnemonic

This mnemonic has been supported by GAS for years and
it was added to the PowerPC ISA as of ISA 3.1. We will
support the mnemonic to be compatible with GAS.

Added: 
    

Modified: 
    llvm/lib/Target/PowerPC/PPCInstrInfo.td
    llvm/test/MC/PowerPC/ppc64-encoding-bookII.s

Removed: 
    


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diff  --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.td b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
index d83ecc699b192..2340be5b59155 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
@@ -4780,6 +4780,7 @@ class PPCAsmPseudo<string asm, dag iops>
 def : InstAlias<"sc", (SC 0)>;
 
 def : InstAlias<"sync", (SYNC 0)>, Requires<[HasSYNC]>;
+def : InstAlias<"hwsync", (SYNC 0), 0>, Requires<[HasSYNC]>;
 def : InstAlias<"msync", (SYNC 0), 0>, Requires<[HasSYNC]>;
 def : InstAlias<"lwsync", (SYNC 1)>, Requires<[HasSYNC]>;
 def : InstAlias<"ptesync", (SYNC 2)>, Requires<[HasSYNC]>;

diff  --git a/llvm/test/MC/PowerPC/ppc64-encoding-bookII.s b/llvm/test/MC/PowerPC/ppc64-encoding-bookII.s
index bd50e2321ffdf..70410fa30ae52 100644
--- a/llvm/test/MC/PowerPC/ppc64-encoding-bookII.s
+++ b/llvm/test/MC/PowerPC/ppc64-encoding-bookII.s
@@ -207,6 +207,9 @@
 # CHECK-BE: lwsync                          # encoding: [0x7c,0x20,0x04,0xac]
 # CHECK-LE: lwsync                          # encoding: [0xac,0x04,0x20,0x7c]
             lwsync
+# CHECK-BE: sync                            # encoding: [0x7c,0x00,0x04,0xac]
+# CHECK-LE: sync                            # encoding: [0xac,0x04,0x00,0x7c]
+            hwsync
 # CHECK-BE: ptesync                         # encoding: [0x7c,0x40,0x04,0xac]
 # CHECK-LE: ptesync                         # encoding: [0xac,0x04,0x40,0x7c]
             ptesync