target: support scalable vectors on arm64ec

davidtwco · davidtwco · commit df5663274cde · 2026-04-08T07:18:57.000Z
This architecture is also AArch64, just with a different ABI, and so
supports scalable vectors too.
diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
@@ -1957,11 +1957,10 @@ impl Arch {
         use Arch::*;
 
         match self {
-            AArch64 | RiscV32 | RiscV64 => true,
-            AmdGpu | Arm | Arm64EC | Avr | Bpf | CSky | Hexagon | LoongArch32 | LoongArch64
-            | M68k | Mips | Mips32r6 | Mips64 | Mips64r6 | Msp430 | Nvptx64 | PowerPC
-            | PowerPC64 | S390x | Sparc | Sparc64 | SpirV | Wasm32 | Wasm64 | X86 | X86_64
-            | Xtensa | Other(_) => false,
+            Arm64EC | AArch64 | RiscV32 | RiscV64 => true,
+            AmdGpu | Arm | Avr | Bpf | CSky | Hexagon | LoongArch32 | LoongArch64 | M68k | Mips
+            | Mips32r6 | Mips64 | Mips64r6 | Msp430 | Nvptx64 | PowerPC | PowerPC64 | S390x
+            | Sparc | Sparc64 | SpirV | Wasm32 | Wasm64 | X86 | X86_64 | Xtensa | Other(_) => false,
         }
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -1957,11 +1957,10 @@ impl Arch {`
`1957`	`1957`	`use Arch::*;`
`1958`	`1958`
`1959`	`1959`	`match self {`
`1960`		`- AArch64 \| RiscV32 \| RiscV64 => true,`
`1961`		`- AmdGpu \| Arm \| Arm64EC \| Avr \| Bpf \| CSky \| Hexagon \| LoongArch32 \| LoongArch64`
`1962`		`- \| M68k \| Mips \| Mips32r6 \| Mips64 \| Mips64r6 \| Msp430 \| Nvptx64 \| PowerPC`
`1963`		`- \| PowerPC64 \| S390x \| Sparc \| Sparc64 \| SpirV \| Wasm32 \| Wasm64 \| X86 \| X86_64`
`1964`		`- \| Xtensa \| Other(_) => false,`
	`1960`	`+ Arm64EC \| AArch64 \| RiscV32 \| RiscV64 => true,`
	`1961`	`+ AmdGpu \| Arm \| Avr \| Bpf \| CSky \| Hexagon \| LoongArch32 \| LoongArch64 \| M68k \| Mips`
	`1962`	`+ \| Mips32r6 \| Mips64 \| Mips64r6 \| Msp430 \| Nvptx64 \| PowerPC \| PowerPC64 \| S390x`
	`1963`	`+ \| Sparc \| Sparc64 \| SpirV \| Wasm32 \| Wasm64 \| X86 \| X86_64 \| Xtensa \| Other(_) => false,`
`1965`	`1964`	`}`
`1966`	`1965`	`}`
`1967`	`1966`	`}`