[llvm] [AArch64][SVE] Don't require 16-byte aligned SVE loads/stores with +strict-align (PR #119732)

[Benjamin Maxwell via llvm-commits]

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@@ -0,0 +1,58 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
+; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sve < %s | FileCheck %s
+; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sve,+strict-align < %s | FileCheck %s
+
+define void @nxv16i8(ptr %ldptr, ptr %stptr) {
+; CHECK-LABEL: nxv16i8:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.b
+; CHECK-NEXT:    ld1b { z0.b }, p0/z, [x0]
+; CHECK-NEXT:    st1b { z0.b }, p0, [x1]
+; CHECK-NEXT:    ret
+  %l3 = load <vscale x 16 x i8>, ptr %ldptr, align 1
+  store <vscale x 16 x i8> %l3, ptr %stptr, align 1
+  ret void
+}
+
+define void @nxv8i16(ptr %ldptr, ptr %stptr) {
+; CHECK-LABEL: nxv8i16:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.h
+; CHECK-NEXT:    ld1h { z0.h }, p0/z, [x0]
+; CHECK-NEXT:    st1h { z0.h }, p0, [x1]
+; CHECK-NEXT:    ret
+  %l3 = load <vscale x 8 x i16>, ptr %ldptr, align 2
+  store <vscale x 8 x i16> %l3, ptr %stptr, align 2
+  ret void
+}
+
+define void @nxv4i32(ptr %ldptr, ptr %stptr) {
+; CHECK-LABEL: nxv4i32:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.s
+; CHECK-NEXT:    ld1w { z0.s }, p0/z, [x0]
+; CHECK-NEXT:    st1w { z0.s }, p0, [x1]
+; CHECK-NEXT:    ret
+  %l3 = load <vscale x 4 x i32>, ptr %ldptr, align 4
+  store <vscale x 4 x i32> %l3, ptr %stptr, align 4
+  ret void
+}
+
+define void @nxv2i64(ptr %ldptr, ptr %stptr) {
+; CHECK-LABEL: nxv2i64:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.d
+; CHECK-NEXT:    ld1d { z0.d }, p0/z, [x0]
+; CHECK-NEXT:    st1d { z0.d }, p0, [x1]
+; CHECK-NEXT:    ret
+  %l3 = load <vscale x 2 x i64>, ptr %ldptr, align 8
+  store <vscale x 2 x i64> %l3, ptr %stptr, align 8
+  ret void
+}
+
+; FIXME: Support TLI.expandUnalignedLoad()/TLI.expandUnalignedStore() for SVE.
+; define void @unaligned_nxv2i64(ptr %ldptr, ptr %stptr) {
+;   %l3 = load <vscale x 2 x i64>, ptr %ldptr, align 4
+;   store <vscale x 2 x i64> %l3, ptr %stptr, align 4
+;   ret void
+; }
----------------
MacDue wrote:

Move this to a XFAIL test :+1: 

https://github.com/llvm/llvm-project/pull/119732