[AArch64][v8.7-A] Fix inconsistency in SPE_EEF feature (#115296)
The `SPE-EEF` system-register only feature introduced in Armv8.7-a adds
support for an extra system register (`PMSNEVFR_EL1`) to the Statistical
Profiling extension.
However, `SPE-EEF` is gated even for Armv8.7-a and the `spe-eef`
subtarget-feature is needed to enable it.
This behavior is inconsistent with the implementation for other
system-register only features as they can be used ungated under
supported architectures.
(e.g. HCX : Enable Armv8.7-A `HCRX_EL2` system register).
GCC/Binutils too do not add command line flags for features that only
enable system registers.
Fix by enabling `SPE-EEF` unconditionally under v8.7-A and above.
diff --git a/clang/test/Driver/print-enabled-extensions/aarch64-ampere1b.c b/clang/test/Driver/print-enabled-extensions/aarch64-ampere1b.c
index 444ac45..d9bee70 100644
--- a/clang/test/Driver/print-enabled-extensions/aarch64-ampere1b.c
+++ b/clang/test/Driver/print-enabled-extensions/aarch64-ampere1b.c
@@ -51,6 +51,7 @@
// CHECK-NEXT: FEAT_SHA3, FEAT_SHA512 Enable SHA512 and SHA3 support
// CHECK-NEXT: FEAT_SM4, FEAT_SM3 Enable SM3 and SM4 support
// CHECK-NEXT: FEAT_SPECRES Enable Armv8.5-A execution and data prediction invalidation instructions
+// CHECK-NEXT: FEAT_SPEv1p2 Enable extra register in the Statistical Profiling Extension
// CHECK-NEXT: FEAT_SSBS, FEAT_SSBS2 Enable Speculative Store Bypass Safe bit
// CHECK-NEXT: FEAT_TLBIOS, FEAT_TLBIRANGE Enable Armv8.4-A TLB Range and Maintenance instructions
// CHECK-NEXT: FEAT_TRF Enable Armv8.4-A Trace extension
diff --git a/clang/test/Driver/print-enabled-extensions/aarch64-apple-m4.c b/clang/test/Driver/print-enabled-extensions/aarch64-apple-m4.c
index 29d66dc..0e40c13 100644
--- a/clang/test/Driver/print-enabled-extensions/aarch64-apple-m4.c
+++ b/clang/test/Driver/print-enabled-extensions/aarch64-apple-m4.c
@@ -51,6 +51,7 @@
// CHECK-NEXT: FEAT_SME_F64F64 Enable Scalable Matrix Extension (SME) F64F64 instructions
// CHECK-NEXT: FEAT_SME_I16I64 Enable Scalable Matrix Extension (SME) I16I64 instructions
// CHECK-NEXT: FEAT_SPECRES Enable Armv8.5-A execution and data prediction invalidation instructions
+// CHECK-NEXT: FEAT_SPEv1p2 Enable extra register in the Statistical Profiling Extension
// CHECK-NEXT: FEAT_TLBIOS, FEAT_TLBIRANGE Enable Armv8.4-A TLB Range and Maintenance instructions
// CHECK-NEXT: FEAT_TRF Enable Armv8.4-A Trace extension
// CHECK-NEXT: FEAT_UAO Enable Armv8.2-A UAO PState
diff --git a/clang/test/Driver/print-enabled-extensions/aarch64-armv8.7-a.c b/clang/test/Driver/print-enabled-extensions/aarch64-armv8.7-a.c
index a41b8de..4a8e18b 100644
--- a/clang/test/Driver/print-enabled-extensions/aarch64-armv8.7-a.c
+++ b/clang/test/Driver/print-enabled-extensions/aarch64-armv8.7-a.c
@@ -42,6 +42,7 @@
// CHECK-NEXT: FEAT_SB Enable Armv8.5-A Speculation Barrier
// CHECK-NEXT: FEAT_SEL2 Enable Armv8.4-A Secure Exception Level 2 extension
// CHECK-NEXT: FEAT_SPECRES Enable Armv8.5-A execution and data prediction invalidation instructions
+// CHECK-NEXT: FEAT_SPEv1p2 Enable extra register in the Statistical Profiling Extension
// CHECK-NEXT: FEAT_SSBS, FEAT_SSBS2 Enable Speculative Store Bypass Safe bit
// CHECK-NEXT: FEAT_TLBIOS, FEAT_TLBIRANGE Enable Armv8.4-A TLB Range and Maintenance instructions
// CHECK-NEXT: FEAT_TRBE Enable Trace Buffer Extension
diff --git a/clang/test/Driver/print-enabled-extensions/aarch64-armv8.8-a.c b/clang/test/Driver/print-enabled-extensions/aarch64-armv8.8-a.c
index 2f41536..160acb5 100644
--- a/clang/test/Driver/print-enabled-extensions/aarch64-armv8.8-a.c
+++ b/clang/test/Driver/print-enabled-extensions/aarch64-armv8.8-a.c
@@ -45,6 +45,7 @@
// CHECK-NEXT: FEAT_SB Enable Armv8.5-A Speculation Barrier
// CHECK-NEXT: FEAT_SEL2 Enable Armv8.4-A Secure Exception Level 2 extension
// CHECK-NEXT: FEAT_SPECRES Enable Armv8.5-A execution and data prediction invalidation instructions
+// CHECK-NEXT: FEAT_SPEv1p2 Enable extra register in the Statistical Profiling Extension
// CHECK-NEXT: FEAT_SSBS, FEAT_SSBS2 Enable Speculative Store Bypass Safe bit
// CHECK-NEXT: FEAT_TLBIOS, FEAT_TLBIRANGE Enable Armv8.4-A TLB Range and Maintenance instructions
// CHECK-NEXT: FEAT_TRBE Enable Trace Buffer Extension
diff --git a/clang/test/Driver/print-enabled-extensions/aarch64-armv8.9-a.c b/clang/test/Driver/print-enabled-extensions/aarch64-armv8.9-a.c
index 33277b0..04bd8fc 100644
--- a/clang/test/Driver/print-enabled-extensions/aarch64-armv8.9-a.c
+++ b/clang/test/Driver/print-enabled-extensions/aarch64-armv8.9-a.c
@@ -51,6 +51,7 @@
// CHECK-NEXT: FEAT_SEL2 Enable Armv8.4-A Secure Exception Level 2 extension
// CHECK-NEXT: FEAT_SPECRES Enable Armv8.5-A execution and data prediction invalidation instructions
// CHECK-NEXT: FEAT_SPECRES2 Enable Speculation Restriction Instruction
+// CHECK-NEXT: FEAT_SPEv1p2 Enable extra register in the Statistical Profiling Extension
// CHECK-NEXT: FEAT_SSBS, FEAT_SSBS2 Enable Speculative Store Bypass Safe bit
// CHECK-NEXT: FEAT_TLBIOS, FEAT_TLBIRANGE Enable Armv8.4-A TLB Range and Maintenance instructions
// CHECK-NEXT: FEAT_TRBE Enable Trace Buffer Extension
diff --git a/clang/test/Driver/print-enabled-extensions/aarch64-armv9.2-a.c b/clang/test/Driver/print-enabled-extensions/aarch64-armv9.2-a.c
index 0950b13..d3b2612 100644
--- a/clang/test/Driver/print-enabled-extensions/aarch64-armv9.2-a.c
+++ b/clang/test/Driver/print-enabled-extensions/aarch64-armv9.2-a.c
@@ -45,6 +45,7 @@
// CHECK-NEXT: FEAT_SB Enable Armv8.5-A Speculation Barrier
// CHECK-NEXT: FEAT_SEL2 Enable Armv8.4-A Secure Exception Level 2 extension
// CHECK-NEXT: FEAT_SPECRES Enable Armv8.5-A execution and data prediction invalidation instructions
+// CHECK-NEXT: FEAT_SPEv1p2 Enable extra register in the Statistical Profiling Extension
// CHECK-NEXT: FEAT_SSBS, FEAT_SSBS2 Enable Speculative Store Bypass Safe bit
// CHECK-NEXT: FEAT_SVE Enable Scalable Vector Extension (SVE) instructions
// CHECK-NEXT: FEAT_SVE2 Enable Scalable Vector Extension 2 (SVE2) instructions
diff --git a/clang/test/Driver/print-enabled-extensions/aarch64-armv9.3-a.c b/clang/test/Driver/print-enabled-extensions/aarch64-armv9.3-a.c
index 0ccb31f..61894f0 100644
--- a/clang/test/Driver/print-enabled-extensions/aarch64-armv9.3-a.c
+++ b/clang/test/Driver/print-enabled-extensions/aarch64-armv9.3-a.c
@@ -48,6 +48,7 @@
// CHECK-NEXT: FEAT_SB Enable Armv8.5-A Speculation Barrier
// CHECK-NEXT: FEAT_SEL2 Enable Armv8.4-A Secure Exception Level 2 extension
// CHECK-NEXT: FEAT_SPECRES Enable Armv8.5-A execution and data prediction invalidation instructions
+// CHECK-NEXT: FEAT_SPEv1p2 Enable extra register in the Statistical Profiling Extension
// CHECK-NEXT: FEAT_SSBS, FEAT_SSBS2 Enable Speculative Store Bypass Safe bit
// CHECK-NEXT: FEAT_SVE Enable Scalable Vector Extension (SVE) instructions
// CHECK-NEXT: FEAT_SVE2 Enable Scalable Vector Extension 2 (SVE2) instructions
diff --git a/clang/test/Driver/print-enabled-extensions/aarch64-armv9.4-a.c b/clang/test/Driver/print-enabled-extensions/aarch64-armv9.4-a.c
index d349602..0032c92 100644
--- a/clang/test/Driver/print-enabled-extensions/aarch64-armv9.4-a.c
+++ b/clang/test/Driver/print-enabled-extensions/aarch64-armv9.4-a.c
@@ -54,6 +54,7 @@
// CHECK-NEXT: FEAT_SEL2 Enable Armv8.4-A Secure Exception Level 2 extension
// CHECK-NEXT: FEAT_SPECRES Enable Armv8.5-A execution and data prediction invalidation instructions
// CHECK-NEXT: FEAT_SPECRES2 Enable Speculation Restriction Instruction
+// CHECK-NEXT: FEAT_SPEv1p2 Enable extra register in the Statistical Profiling Extension
// CHECK-NEXT: FEAT_SSBS, FEAT_SSBS2 Enable Speculative Store Bypass Safe bit
// CHECK-NEXT: FEAT_SVE Enable Scalable Vector Extension (SVE) instructions
// CHECK-NEXT: FEAT_SVE2 Enable Scalable Vector Extension 2 (SVE2) instructions
diff --git a/clang/test/Driver/print-enabled-extensions/aarch64-armv9.5-a.c b/clang/test/Driver/print-enabled-extensions/aarch64-armv9.5-a.c
index cc4469f..be24bd0 100644
--- a/clang/test/Driver/print-enabled-extensions/aarch64-armv9.5-a.c
+++ b/clang/test/Driver/print-enabled-extensions/aarch64-armv9.5-a.c
@@ -57,6 +57,7 @@
// CHECK-NEXT: FEAT_SEL2 Enable Armv8.4-A Secure Exception Level 2 extension
// CHECK-NEXT: FEAT_SPECRES Enable Armv8.5-A execution and data prediction invalidation instructions
// CHECK-NEXT: FEAT_SPECRES2 Enable Speculation Restriction Instruction
+// CHECK-NEXT: FEAT_SPEv1p2 Enable extra register in the Statistical Profiling Extension
// CHECK-NEXT: FEAT_SSBS, FEAT_SSBS2 Enable Speculative Store Bypass Safe bit
// CHECK-NEXT: FEAT_SVE Enable Scalable Vector Extension (SVE) instructions
// CHECK-NEXT: FEAT_SVE2 Enable Scalable Vector Extension 2 (SVE2) instructions
diff --git a/clang/test/Driver/print-enabled-extensions/aarch64-cortex-a520.c b/clang/test/Driver/print-enabled-extensions/aarch64-cortex-a520.c
index 6ddd52a..b906074 100644
--- a/clang/test/Driver/print-enabled-extensions/aarch64-cortex-a520.c
+++ b/clang/test/Driver/print-enabled-extensions/aarch64-cortex-a520.c
@@ -46,6 +46,7 @@
// CHECK-NEXT: FEAT_SB Enable Armv8.5-A Speculation Barrier
// CHECK-NEXT: FEAT_SEL2 Enable Armv8.4-A Secure Exception Level 2 extension
// CHECK-NEXT: FEAT_SPECRES Enable Armv8.5-A execution and data prediction invalidation instructions
+// CHECK-NEXT: FEAT_SPEv1p2 Enable extra register in the Statistical Profiling Extension
// CHECK-NEXT: FEAT_SSBS, FEAT_SSBS2 Enable Speculative Store Bypass Safe bit
// CHECK-NEXT: FEAT_SVE Enable Scalable Vector Extension (SVE) instructions
// CHECK-NEXT: FEAT_SVE2 Enable Scalable Vector Extension 2 (SVE2) instructions
diff --git a/clang/test/Driver/print-enabled-extensions/aarch64-cortex-a520ae.c b/clang/test/Driver/print-enabled-extensions/aarch64-cortex-a520ae.c
index 35399a3..2e14773 100644
--- a/clang/test/Driver/print-enabled-extensions/aarch64-cortex-a520ae.c
+++ b/clang/test/Driver/print-enabled-extensions/aarch64-cortex-a520ae.c
@@ -46,6 +46,7 @@
// CHECK-NEXT: FEAT_SB Enable Armv8.5-A Speculation Barrier
// CHECK-NEXT: FEAT_SEL2 Enable Armv8.4-A Secure Exception Level 2 extension
// CHECK-NEXT: FEAT_SPECRES Enable Armv8.5-A execution and data prediction invalidation instructions
+// CHECK-NEXT: FEAT_SPEv1p2 Enable extra register in the Statistical Profiling Extension
// CHECK-NEXT: FEAT_SSBS, FEAT_SSBS2 Enable Speculative Store Bypass Safe bit
// CHECK-NEXT: FEAT_SVE Enable Scalable Vector Extension (SVE) instructions
// CHECK-NEXT: FEAT_SVE2 Enable Scalable Vector Extension 2 (SVE2) instructions
diff --git a/llvm/lib/Target/AArch64/AArch64Features.td b/llvm/lib/Target/AArch64/AArch64Features.td
index 642976c..6d8554c 100644
--- a/llvm/lib/Target/AArch64/AArch64Features.td
+++ b/llvm/lib/Target/AArch64/AArch64Features.td
@@ -847,7 +847,7 @@
FeatureEnhancedCounterVirtualization, FeatureMatMulInt8],
!listconcat(HasV8_5aOps.DefaultExts, [FeatureBF16, FeatureMatMulInt8])>;
def HasV8_7aOps : Architecture64<8, 7, "a", "v8.7a",
- [HasV8_6aOps, FeatureXS, FeatureWFxT, FeatureHCX],
+ [HasV8_6aOps, FeatureXS, FeatureWFxT, FeatureHCX, FeatureSPE_EEF],
!listconcat(HasV8_6aOps.DefaultExts, [FeatureWFxT])>;
def HasV8_8aOps : Architecture64<8, 8, "a", "v8.8a",
[HasV8_7aOps, FeatureHBC, FeatureMOPS, FeatureNMI],
diff --git a/llvm/test/MC/AArch64/spe.s b/llvm/test/MC/AArch64/spe.s
index a6fb462..a4b2a55 100644
--- a/llvm/test/MC/AArch64/spe.s
+++ b/llvm/test/MC/AArch64/spe.s
@@ -1,6 +1,11 @@
// RUN: llvm-mc -triple aarch64 -mattr +spe-eef -show-encoding %s 2>%t | FileCheck %s
+// RUN: llvm-mc -triple aarch64 -mattr +v8.7a -show-encoding %s 2>%t | FileCheck %s
+// RUN: not llvm-mc -triple aarch64 < %s 2>&1 | FileCheck --check-prefix=CHECK-NO-SPE-EEF-ERR %s
msr PMSNEVFR_EL1, x0
mrs x1, PMSNEVFR_EL1
// CHECK: msr PMSNEVFR_EL1, x0 // encoding: [0x20,0x99,0x18,0xd5]
// CHECK: mrs x1, PMSNEVFR_EL1 // encoding: [0x21,0x99,0x38,0xd5]
+
+// CHECK-NO-SPE-EEF-ERR: [[@LINE-5]]:5: error: expected writable system register or pstate
+// CHECK-NO-SPE-EEF-ERR: [[@LINE-5]]:9: error: expected readable system register
