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[AArch64] Add ISel patterns for LDAPURS* instructions #171788

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[AArch64] Add ISel patterns for LDAPURS* instructions #171788

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7954fc6
[AArch64] Add ISel patterns for LDAPURS* instructions
cofibrant Dec 11, 2025
77599c7
Update Neoverse tests
cofibrant Dec 11, 2025
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22 changes: 22 additions & 0 deletions llvm/lib/Target/AArch64/AArch64InstrAtomics.td
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Original file line number Diff line number Diff line change
Expand Up @@ -602,6 +602,8 @@ let Predicates = [HasRCPC3, HasNEON] in {
// v8.4a FEAT_LRCPC2 patterns
let Predicates = [HasRCPC_IMMO, UseLDAPUR] in {
// Load-Acquire RCpc Register unscaled loads

// Zero-extended
def : Pat<(acquiring_load<atomic_load_azext_8>
(am_unscaled8 GPR64sp:$Rn, simm9:$offset)),
(LDAPURBi GPR64sp:$Rn, simm9:$offset)>;
Expand All @@ -614,6 +616,26 @@ let Predicates = [HasRCPC_IMMO, UseLDAPUR] in {
def : Pat<(acquiring_load<atomic_load_nonext_64>
(am_unscaled64 GPR64sp:$Rn, simm9:$offset)),
(LDAPURXi GPR64sp:$Rn, simm9:$offset)>;

// Sign-extended
def : Pat<(sext_inreg (acquiring_load<atomic_load_8>
(am_unscaled8 GPR64sp:$Rn, simm9:$offset)), i8),
(LDAPURSBWi GPR64sp:$Rn, i64:$offset)>;
def : Pat<(sext_inreg (i64 (anyext (i32
(acquiring_load<atomic_load_8>
(am_unscaled8 GPR64sp:$Rn, simm9:$offset))))), i8),
(LDAPURSBXi GPR64sp:$Rn, i64:$offset)>;
def : Pat<(sext_inreg (acquiring_load<atomic_load_16>
(am_unscaled16 GPR64sp:$Rn, simm9:$offset)), i16),
(LDAPURSHWi GPR64sp:$Rn, i64:$offset)>;
def : Pat<(sext_inreg (i64 (anyext (i32
(acquiring_load<atomic_load_16>
(am_unscaled16 GPR64sp:$Rn, simm9:$offset))))), i16),
(LDAPURSHXi GPR64sp:$Rn, i64:$offset)>;
def : Pat<(i64 (sext (i32
(acquiring_load<atomic_load_32>
(am_unscaled32 GPR64sp:$Rn, simm9:$offset))))),
(LDAPURSWi GPR64sp:$Rn, i64:$offset)>;
}

let Predicates = [HasRCPC_IMMO] in {
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