[clang] [llvm] [RISCV] Remove experimental from Zacas. (PR #83195)
Craig Topper via cfe-commits
cfe-commits at lists.llvm.org
Wed Feb 28 19:15:15 PST 2024
https://github.com/topperc updated https://github.com/llvm/llvm-project/pull/83195
>From 8ed68475b43008d9c7baff7f275026cc7ada5993 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper at sifive.com>
Date: Tue, 27 Feb 2024 14:01:52 -0800
Subject: [PATCH 1/4] [RISCV] Remove experimental from Zacas.
Document that we don't use the double compare and swap instructions due
to ABI concerns.
---
.../test/Preprocessor/riscv-target-features.c | 18 +++++++++---------
llvm/docs/RISCVUsage.rst | 9 ++++++---
llvm/docs/ReleaseNotes.rst | 1 +
llvm/lib/Support/RISCVISAInfo.cpp | 2 +-
llvm/lib/Target/RISCV/RISCVFeatures.td | 2 +-
.../RISCV/atomic-cmpxchg-branch-on-result.ll | 6 +++---
llvm/test/CodeGen/RISCV/atomic-cmpxchg.ll | 12 ++++++------
llvm/test/CodeGen/RISCV/atomic-rmw.ll | 12 ++++++------
llvm/test/CodeGen/RISCV/atomic-signext.ll | 4 ++--
llvm/test/CodeGen/RISCV/attributes.ll | 4 ++--
llvm/test/MC/RISCV/rv32zacas-invalid.s | 2 +-
llvm/test/MC/RISCV/rv32zacas-valid.s | 12 ++++++------
llvm/test/MC/RISCV/rv64zacas-valid.s | 6 +++---
llvm/test/MC/RISCV/rvzabha-zacas-valid.s | 12 ++++++------
llvm/unittests/Support/RISCVISAInfoTest.cpp | 2 +-
15 files changed, 54 insertions(+), 50 deletions(-)
diff --git a/clang/test/Preprocessor/riscv-target-features.c b/clang/test/Preprocessor/riscv-target-features.c
index ea81c662044306..df13e0beb16326 100644
--- a/clang/test/Preprocessor/riscv-target-features.c
+++ b/clang/test/Preprocessor/riscv-target-features.c
@@ -75,6 +75,7 @@
// CHECK-NOT: __riscv_za128rs {{.*$}}
// CHECK-NOT: __riscv_za64rs {{.*$}}
// CHECK-NOT: __riscv_zawrs {{.*$}}
+// CHECK-NOT: __riscv_zacas {{.*$}}
// CHECK-NOT: __riscv_zba {{.*$}}
// CHECK-NOT: __riscv_zbb {{.*$}}
// CHECK-NOT: __riscv_zbc {{.*$}}
@@ -166,7 +167,6 @@
// CHECK-NOT: __riscv_ssqosid{{.*$}}
// CHECK-NOT: __riscv_supm{{.*$}}
// CHECK-NOT: __riscv_zaamo {{.*$}}
-// CHECK-NOT: __riscv_zacas {{.*$}}
// CHECK-NOT: __riscv_zalasr {{.*$}}
// CHECK-NOT: __riscv_zalrsc {{.*$}}
// CHECK-NOT: __riscv_zcmop {{.*$}}
@@ -660,6 +660,14 @@
// RUN: -o - | FileCheck --check-prefix=CHECK-ZA64RS-EXT %s
// CHECK-ZA64RS-EXT: __riscv_za64rs 1000000{{$}}
+// RUN: %clang --target=riscv32 \
+// RUN: -march=rv32i_zacas1p0 -E -dM %s \
+// RUN: -o - | FileCheck --check-prefix=CHECK-ZACAS-EXT %s
+// RUN: %clang --target=riscv64 \
+// RUN: -march=rv64i_zacas1p0 -E -dM %s \
+// RUN: -o - | FileCheck --check-prefix=CHECK-ZACAS-EXT %s
+// CHECK-ZACAS-EXT: __riscv_zacas 1000000{{$}}
+
// RUN: %clang --target=riscv32-unknown-linux-gnu \
// RUN: -march=rv32izawrs -E -dM %s \
// RUN: -o - | FileCheck --check-prefix=CHECK-ZAWRS-EXT %s
@@ -1485,14 +1493,6 @@
// RUN: -o - | FileCheck --check-prefix=CHECK-ZAAMO-EXT %s
// CHECK-ZAAMO-EXT: __riscv_zaamo 2000{{$}}
-// RUN: %clang --target=riscv32 -menable-experimental-extensions \
-// RUN: -march=rv32i_zacas1p0 -E -dM %s \
-// RUN: -o - | FileCheck --check-prefix=CHECK-ZACAS-EXT %s
-// RUN: %clang --target=riscv64 -menable-experimental-extensions \
-// RUN: -march=rv64i_zacas1p0 -E -dM %s \
-// RUN: -o - | FileCheck --check-prefix=CHECK-ZACAS-EXT %s
-// CHECK-ZACAS-EXT: __riscv_zacas 1000000{{$}}
-
// RUN: %clang --target=riscv32 -menable-experimental-extensions \
// RUN: -march=rv32i_zalasr0p1 -E -dM %s \
// RUN: -o - | FileCheck --check-prefix=CHECK-ZALASR-EXT %s
diff --git a/llvm/docs/RISCVUsage.rst b/llvm/docs/RISCVUsage.rst
index ed443596897aea..26bcf7fbf5490c 100644
--- a/llvm/docs/RISCVUsage.rst
+++ b/llvm/docs/RISCVUsage.rst
@@ -117,6 +117,7 @@ on support follow.
``V`` Supported
``Za128rs`` Supported (`See note <#riscv-profiles-extensions-note>`__)
``Za64rs`` Supported (`See note <#riscv-profiles-extensions-note>`__)
+ ``Zacas`` Supported (`See note <#riscv-zacas-note>`__)
``Zawrs`` Assembly Support
``Zba`` Supported
``Zbb`` Supported
@@ -236,6 +237,11 @@ Supported
``Za128rs``, ``Za64rs``, ``Zic64b``, ``Ziccamoa``, ``Ziccif``, ``Zicclsm``, ``Ziccrse``, ``Shcounterenvw``, ``Shgatpa``, ``Shtvala``, ``Shvsatpa``, ``Shvstvala``, ``Shvstvecd``, ``Ssccptr``, ``Sscounterenw``, ``Ssstateen``, ``Ssstrict``, ``Sstvala``, ``Sstvecd``, ``Ssu64xl``, ``Svade``, ``Svbare``
These extensions are defined as part of the `RISC-V Profiles specification <https://github.com/riscv/riscv-profiles/releases/tag/v1.0>`__. They do not introduce any new features themselves, but instead describe existing hardware features.
+ .. _riscv-zacas-note:
+
+``Zacas``
+ amocas.w will be used for i32 cmpxchg on RV32. amocas.d will be used i64 cmpxchg on RV64. The compiler will not generate amocas.d on RV32 or amocas.q on RV64 due to ABI compatibilty. These can only be used in the assembler.
+
Experimental Extensions
=======================
@@ -252,9 +258,6 @@ The primary goal of experimental support is to assist in the process of ratifica
``experimental-zabha``
LLVM implements the `v1.0-rc1 draft specification <https://github.com/riscv/riscv-zabha/tree/v1.0-rc1>`__.
-``experimental-zacas``
- LLVM implements the `1.0-rc1 draft specification <https://github.com/riscv/riscv-zacas/releases/tag/v1.0-rc1>`__.
-
``experimental-zalasr``
LLVM implements the `0.0.5 draft specification <https://github.com/mehnadnerd/riscv-zalasr>`__.
diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
index 5be00d9d5a5899..a7507498fb5b2c 100644
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -103,6 +103,7 @@ Changes to the RISC-V Backend
* Codegen support was added for the Zimop (May-Be-Operations) extension.
* The experimental Ssnpm, Smnpm, Smmpm, Sspm, and Supm 0.8.1 Pointer Masking extensions are supported.
* The experimental Ssqosid extension is supported.
+* Zacas is is no longer experimental.
Changes to the WebAssembly Backend
----------------------------------
diff --git a/llvm/lib/Support/RISCVISAInfo.cpp b/llvm/lib/Support/RISCVISAInfo.cpp
index d028302b8c4d94..68f5c36e8fafc6 100644
--- a/llvm/lib/Support/RISCVISAInfo.cpp
+++ b/llvm/lib/Support/RISCVISAInfo.cpp
@@ -109,6 +109,7 @@ static const RISCVSupportedExtension SupportedExtensions[] = {
{"za128rs", {1, 0}},
{"za64rs", {1, 0}},
+ {"zacas", {1, 0}},
{"zawrs", {1, 0}},
{"zba", {1, 0}},
@@ -220,7 +221,6 @@ static const RISCVSupportedExtension SupportedExperimentalExtensions[] = {
{"zaamo", {0, 2}},
{"zabha", {1, 0}},
- {"zacas", {1, 0}},
{"zalasr", {0, 1}},
{"zalrsc", {0, 2}},
diff --git a/llvm/lib/Target/RISCV/RISCVFeatures.td b/llvm/lib/Target/RISCV/RISCVFeatures.td
index bcaf4477749494..9773b2998c7dc4 100644
--- a/llvm/lib/Target/RISCV/RISCVFeatures.td
+++ b/llvm/lib/Target/RISCV/RISCVFeatures.td
@@ -185,7 +185,7 @@ def HasStdExtZabha : Predicate<"Subtarget->hasStdExtZabha()">,
"'Zabha' (Byte and Halfword Atomic Memory Operations)">;
def FeatureStdExtZacas
- : SubtargetFeature<"experimental-zacas", "HasStdExtZacas", "true",
+ : SubtargetFeature<"zacas", "HasStdExtZacas", "true",
"'Zacas' (Atomic Compare-And-Swap Instructions)">;
def HasStdExtZacas : Predicate<"Subtarget->hasStdExtZacas()">,
AssemblerPredicate<(all_of FeatureStdExtZacas),
diff --git a/llvm/test/CodeGen/RISCV/atomic-cmpxchg-branch-on-result.ll b/llvm/test/CodeGen/RISCV/atomic-cmpxchg-branch-on-result.ll
index 90d78779b764d2..18b66499b85fe3 100644
--- a/llvm/test/CodeGen/RISCV/atomic-cmpxchg-branch-on-result.ll
+++ b/llvm/test/CodeGen/RISCV/atomic-cmpxchg-branch-on-result.ll
@@ -1,13 +1,13 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -mattr=+a -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=NOZACAS,RV32IA %s
-; RUN: llc -mtriple=riscv32 -mattr=+a,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv32 -mattr=+a,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=ZACAS,RV32IA-ZACAS %s
; RUN: llc -mtriple=riscv64 -mattr=+a -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=NOZACAS,RV64IA %s
-; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv64 -mattr=+a,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=ZACAS,RV64IA-ZACAS %s
-; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-zacas,+experimental-zabha -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv64 -mattr=+a,+zacas,+experimental-zabha -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=ZACAS,RV64IA-ZABHA %s
; Test cmpxchg followed by a branch on the cmpxchg success value to see if the
diff --git a/llvm/test/CodeGen/RISCV/atomic-cmpxchg.ll b/llvm/test/CodeGen/RISCV/atomic-cmpxchg.ll
index 8df37bf40975c1..394dffa346ec63 100644
--- a/llvm/test/CodeGen/RISCV/atomic-cmpxchg.ll
+++ b/llvm/test/CodeGen/RISCV/atomic-cmpxchg.ll
@@ -3,25 +3,25 @@
; RUN: | FileCheck -check-prefix=RV32I %s
; RUN: llc -mtriple=riscv32 -mattr=+a -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV32IA,RV32IA-WMO %s
-; RUN: llc -mtriple=riscv32 -mattr=+a,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv32 -mattr=+a,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV32IA,RV32IA-ZACAS,RV32IA-WMO-ZACAS %s
; RUN: llc -mtriple=riscv32 -mattr=+a,+experimental-ztso -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV32IA,RV32IA-TSO %s
-; RUN: llc -mtriple=riscv32 -mattr=+a,+experimental-ztso,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv32 -mattr=+a,+experimental-ztso,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV32IA,RV32IA-ZACAS,RV32IA-TSO-ZACAS %s
; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefix=RV64I %s
; RUN: llc -mtriple=riscv64 -mattr=+a -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-WMO %s
-; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv64 -mattr=+a,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-ZACAS,RV64IA-WMO-ZACAS %s
-; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-zacas,+experimental-zabha -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv64 -mattr=+a,+zacas,+experimental-zabha -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-ZABHA,RV64IA-WMO-ZABHA %s
; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-ztso -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-TSO %s
-; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-ztso,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-ztso,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-ZACAS,RV64IA-TSO-ZACAS %s
-; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-ztso,+experimental-zacas,+experimental-zabha -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-ztso,+zacas,+experimental-zabha -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-ZABHA,RV64IA-TSO-ZABHA %s
define void @cmpxchg_i8_monotonic_monotonic(ptr %ptr, i8 %cmp, i8 %val) nounwind {
diff --git a/llvm/test/CodeGen/RISCV/atomic-rmw.ll b/llvm/test/CodeGen/RISCV/atomic-rmw.ll
index ee802507a02f3c..fe530017406133 100644
--- a/llvm/test/CodeGen/RISCV/atomic-rmw.ll
+++ b/llvm/test/CodeGen/RISCV/atomic-rmw.ll
@@ -12,22 +12,22 @@
; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-ztso -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-NOZACAS,RV64IA-TSO,RV64IA-TSO-NOZACAS %s
-; RUN: llc -mtriple=riscv32 -mattr=+a,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv32 -mattr=+a,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV32IA,RV32IA-ZACAS,RV32IA-WMO,RV32IA-WMO-ZACAS %s
-; RUN: llc -mtriple=riscv32 -mattr=+a,+experimental-ztso,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv32 -mattr=+a,+experimental-ztso,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV32IA,RV32IA-ZACAS,RV32IA-TSO,RV32IA-TSO-ZACAS %s
-; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv64 -mattr=+a,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-ZACAS,RV64IA-WMO,RV64IA-WMO-ZACAS %s
-; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-ztso,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-ztso,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-ZACAS,RV64IA-TSO,RV64IA-TSO-ZACAS %s
; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-zabha -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-WMO,RV64IA-WMO-ZABHA,RV64IA-WMO-ZABHA-NOZACAS %s
; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-ztso,+experimental-zabha -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-TSO,RV64IA-TSO-ZABHA,RV64IA-TSO-ZABHA-NOZACAS %s
-; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-zabha,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-zabha,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-WMO,RV64IA-WMO-ZABHA,RV64IA-WMO-ZABHA-ZACAS %s
-; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-ztso,+experimental-zabha,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-ztso,+experimental-zabha,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-TSO,RV64IA-TSO-ZABHA,RV64IA-TSO-ZABHA-ZACAS %s
define i8 @atomicrmw_xchg_i8_monotonic(ptr %a, i8 %b) nounwind {
diff --git a/llvm/test/CodeGen/RISCV/atomic-signext.ll b/llvm/test/CodeGen/RISCV/atomic-signext.ll
index 47807f78d176e8..bdf3b28d2d523b 100644
--- a/llvm/test/CodeGen/RISCV/atomic-signext.ll
+++ b/llvm/test/CodeGen/RISCV/atomic-signext.ll
@@ -3,13 +3,13 @@
; RUN: | FileCheck -check-prefix=RV32I %s
; RUN: llc -mtriple=riscv32 -mattr=+a -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV32IA,RV32IA-NOZACAS %s
-; RUN: llc -mtriple=riscv32 -mattr=+a,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv32 -mattr=+a,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV32IA,RV32IA-ZACAS %s
; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefix=RV64I %s
; RUN: llc -mtriple=riscv64 -mattr=+a -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-NOZACAS %s
-; RUN: llc -mtriple=riscv64 -mattr=+a,+experimental-zacas -verify-machineinstrs < %s \
+; RUN: llc -mtriple=riscv64 -mattr=+a,+zacas -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefixes=RV64IA,RV64IA-ZACAS %s
define signext i8 @atomic_load_i8_unordered(ptr %a) nounwind {
diff --git a/llvm/test/CodeGen/RISCV/attributes.ll b/llvm/test/CodeGen/RISCV/attributes.ll
index 13635a94d6411a..561b0f21dc3770 100644
--- a/llvm/test/CodeGen/RISCV/attributes.ll
+++ b/llvm/test/CodeGen/RISCV/attributes.ll
@@ -111,7 +111,7 @@
; RUN: llc -mtriple=riscv32 -mattr=+experimental-zvfbfmin %s -o - | FileCheck --check-prefixes=CHECK,RV32ZVFBFMIN %s
; RUN: llc -mtriple=riscv32 -mattr=+experimental-zvfbfwma %s -o - | FileCheck --check-prefixes=CHECK,RV32ZVFBFWMA %s
; RUN: llc -mtriple=riscv32 -mattr=+experimental-zaamo %s -o - | FileCheck --check-prefix=RV32ZAAMO %s
-; RUN: llc -mtriple=riscv32 -mattr=+experimental-zacas %s -o - | FileCheck --check-prefix=RV32ZACAS %s
+; RUN: llc -mtriple=riscv32 -mattr=+zacas %s -o - | FileCheck --check-prefix=RV32ZACAS %s
; RUN: llc -mtriple=riscv32 -mattr=+experimental-zalasr %s -o - | FileCheck --check-prefix=RV32ZALASR %s
; RUN: llc -mtriple=riscv32 -mattr=+experimental-zalrsc %s -o - | FileCheck --check-prefix=RV32ZALRSC %s
; RUN: llc -mtriple=riscv32 -mattr=+experimental-zicfilp %s -o - | FileCheck --check-prefix=RV32ZICFILP %s
@@ -240,7 +240,7 @@
; RUN: llc -mtriple=riscv64 -mattr=+experimental-zvfbfmin %s -o - | FileCheck --check-prefixes=CHECK,RV64ZVFBFMIN %s
; RUN: llc -mtriple=riscv64 -mattr=+experimental-zvfbfwma %s -o - | FileCheck --check-prefixes=CHECK,RV64ZVFBFWMA %s
; RUN: llc -mtriple=riscv64 -mattr=+experimental-zaamo %s -o - | FileCheck --check-prefix=RV64ZAAMO %s
-; RUN: llc -mtriple=riscv64 -mattr=+experimental-zacas %s -o - | FileCheck --check-prefix=RV64ZACAS %s
+; RUN: llc -mtriple=riscv64 -mattr=+zacas %s -o - | FileCheck --check-prefix=RV64ZACAS %s
; RUN: llc -mtriple=riscv64 -mattr=+experimental-zalasr %s -o - | FileCheck --check-prefix=RV64ZALASR %s
; RUN: llc -mtriple=riscv64 -mattr=+experimental-zalrsc %s -o - | FileCheck --check-prefix=RV64ZALRSC %s
; RUN: llc -mtriple=riscv64 -mattr=+experimental-zicfilp %s -o - | FileCheck --check-prefix=RV64ZICFILP %s
diff --git a/llvm/test/MC/RISCV/rv32zacas-invalid.s b/llvm/test/MC/RISCV/rv32zacas-invalid.s
index b86246ca2ed180..11d20dacd8a788 100644
--- a/llvm/test/MC/RISCV/rv32zacas-invalid.s
+++ b/llvm/test/MC/RISCV/rv32zacas-invalid.s
@@ -1,4 +1,4 @@
-# RUN: not llvm-mc -triple riscv32 -mattr=+experimental-zacas < %s 2>&1 | FileCheck %s
+# RUN: not llvm-mc -triple riscv32 -mattr=+zacas < %s 2>&1 | FileCheck %s
# Non-zero offsets not supported for the third operand (rs1).
amocas.w a1, a3, 1(a5) # CHECK: :[[@LINE]]:18: error: optional integer offset must be 0
diff --git a/llvm/test/MC/RISCV/rv32zacas-valid.s b/llvm/test/MC/RISCV/rv32zacas-valid.s
index d80b963f0a0477..05a9cdd5cc2188 100644
--- a/llvm/test/MC/RISCV/rv32zacas-valid.s
+++ b/llvm/test/MC/RISCV/rv32zacas-valid.s
@@ -1,12 +1,12 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-zacas -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+zacas -riscv-no-aliases -show-encoding \
# RUN: | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zacas -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+zacas -riscv-no-aliases -show-encoding \
# RUN: | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+experimental-zacas < %s \
-# RUN: | llvm-objdump --mattr=+experimental-zacas -M no-aliases -d -r - \
+# RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+zacas < %s \
+# RUN: | llvm-objdump --mattr=+zacas -M no-aliases -d -r - \
# RUN: | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+experimental-zacas < %s \
-# RUN: | llvm-objdump --mattr=+experimental-zacas -M no-aliases -d -r - \
+# RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+zacas < %s \
+# RUN: | llvm-objdump --mattr=+zacas -M no-aliases -d -r - \
# RUN: | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
# RUN: not llvm-mc -triple=riscv32 -mattr=+a -show-encoding %s 2>&1 \
# RUN: | FileCheck %s --check-prefix=CHECK-ERROR
diff --git a/llvm/test/MC/RISCV/rv64zacas-valid.s b/llvm/test/MC/RISCV/rv64zacas-valid.s
index 843401b50871af..694f43b9b4407b 100644
--- a/llvm/test/MC/RISCV/rv64zacas-valid.s
+++ b/llvm/test/MC/RISCV/rv64zacas-valid.s
@@ -1,7 +1,7 @@
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zacas -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+zacas -riscv-no-aliases -show-encoding \
# RUN: | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+experimental-zacas < %s \
-# RUN: | llvm-objdump --mattr=+experimental-zacas -M no-aliases -d -r - \
+# RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+zacas < %s \
+# RUN: | llvm-objdump --mattr=+zacas -M no-aliases -d -r - \
# RUN: | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
# RUN: not llvm-mc -triple=riscv64 -mattr=+a -show-encoding %s 2>&1 \
# RUN: | FileCheck %s --check-prefix=CHECK-ERROR
diff --git a/llvm/test/MC/RISCV/rvzabha-zacas-valid.s b/llvm/test/MC/RISCV/rvzabha-zacas-valid.s
index 8ad2f99d3febad..f1f705e625b87a 100644
--- a/llvm/test/MC/RISCV/rvzabha-zacas-valid.s
+++ b/llvm/test/MC/RISCV/rvzabha-zacas-valid.s
@@ -1,12 +1,12 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-zabha,+experimental-zacas -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-zabha,+zacas -riscv-no-aliases -show-encoding \
# RUN: | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zabha,+experimental-zacas -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zabha,+zacas -riscv-no-aliases -show-encoding \
# RUN: | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+experimental-zabha,+experimental-zacas < %s \
-# RUN: | llvm-objdump --mattr=+experimental-zabha,+experimental-zacas -M no-aliases -d -r - \
+# RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+experimental-zabha,+zacas < %s \
+# RUN: | llvm-objdump --mattr=+experimental-zabha,+zacas -M no-aliases -d -r - \
# RUN: | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+experimental-zabha,+experimental-zacas < %s \
-# RUN: | llvm-objdump --mattr=+experimental-zabha,+experimental-zacas -M no-aliases -d -r - \
+# RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+experimental-zabha,+zacas < %s \
+# RUN: | llvm-objdump --mattr=+experimental-zabha,+zacas -M no-aliases -d -r - \
# RUN: | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
# RUN: not llvm-mc -triple=riscv32 -mattr=+experimental-zabha -show-encoding %s 2>&1 \
# RUN: | FileCheck %s --check-prefix=CHECK-ERROR
diff --git a/llvm/unittests/Support/RISCVISAInfoTest.cpp b/llvm/unittests/Support/RISCVISAInfoTest.cpp
index df4c7f7de8a3d2..82cce23638d5f5 100644
--- a/llvm/unittests/Support/RISCVISAInfoTest.cpp
+++ b/llvm/unittests/Support/RISCVISAInfoTest.cpp
@@ -752,6 +752,7 @@ R"(All available -march extensions for RISC-V
zmmul 1.0
za128rs 1.0
za64rs 1.0
+ zacas 1.0
zawrs 1.0
zfa 1.0
zfh 1.0
@@ -873,7 +874,6 @@ Experimental extensions
zimop 0.1
zaamo 0.2
zabha 1.0
- zacas 1.0
zalasr 0.1
zalrsc 0.2
zfbfmin 1.0
>From 3f9f158822bc3e4a25030621529f95004334ad57 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper at sifive.com>
Date: Wed, 28 Feb 2024 15:07:24 -0800
Subject: [PATCH 2/4] fixup! alphabetize
---
clang/test/Preprocessor/riscv-target-features.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/clang/test/Preprocessor/riscv-target-features.c b/clang/test/Preprocessor/riscv-target-features.c
index df13e0beb16326..664279cb123949 100644
--- a/clang/test/Preprocessor/riscv-target-features.c
+++ b/clang/test/Preprocessor/riscv-target-features.c
@@ -74,8 +74,8 @@
// CHECK-NOT: __riscv_xventanacondops {{.*$}}
// CHECK-NOT: __riscv_za128rs {{.*$}}
// CHECK-NOT: __riscv_za64rs {{.*$}}
-// CHECK-NOT: __riscv_zawrs {{.*$}}
// CHECK-NOT: __riscv_zacas {{.*$}}
+// CHECK-NOT: __riscv_zawrs {{.*$}}
// CHECK-NOT: __riscv_zba {{.*$}}
// CHECK-NOT: __riscv_zbb {{.*$}}
// CHECK-NOT: __riscv_zbc {{.*$}}
>From dd8208ee133adf2aebfe47b758abdb8c4edfac3d Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper at sifive.com>
Date: Wed, 28 Feb 2024 15:08:52 -0800
Subject: [PATCH 3/4] fixup! correct RISCVUsage.rst.
amoswap.w is also used for i32 on RV64.
---
llvm/docs/RISCVUsage.rst | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/llvm/docs/RISCVUsage.rst b/llvm/docs/RISCVUsage.rst
index 26bcf7fbf5490c..8d293b02144307 100644
--- a/llvm/docs/RISCVUsage.rst
+++ b/llvm/docs/RISCVUsage.rst
@@ -240,7 +240,7 @@ Supported
.. _riscv-zacas-note:
``Zacas``
- amocas.w will be used for i32 cmpxchg on RV32. amocas.d will be used i64 cmpxchg on RV64. The compiler will not generate amocas.d on RV32 or amocas.q on RV64 due to ABI compatibilty. These can only be used in the assembler.
+ amocas.w will be used for i32 cmpxchg. amocas.d will be used i64 cmpxchg on RV64. The compiler will not generate amocas.d on RV32 or amocas.q on RV64 due to ABI compatibilty. These can only be used in the assembler.
Experimental Extensions
=======================
>From e6edea886617e53be999e5b46406e64ef912603f Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper at sifive.com>
Date: Wed, 28 Feb 2024 19:14:59 -0800
Subject: [PATCH 4/4] fixup! fix typo in release notes.
---
llvm/docs/ReleaseNotes.rst | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
index a7507498fb5b2c..c792e2e87ed511 100644
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -103,7 +103,7 @@ Changes to the RISC-V Backend
* Codegen support was added for the Zimop (May-Be-Operations) extension.
* The experimental Ssnpm, Smnpm, Smmpm, Sspm, and Supm 0.8.1 Pointer Masking extensions are supported.
* The experimental Ssqosid extension is supported.
-* Zacas is is no longer experimental.
+* Zacas is no longer experimental.
Changes to the WebAssembly Backend
----------------------------------
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