--- /dev/null
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=aarch64_be-- < %s | FileCheck %s --check-prefix=BE
+; RUN: llc -mtriple=aarch64-- < %s | FileCheck %s --check-prefix=LE
+
+define i32 @trunc_i64_to_i32_le(i64 %x) {
+; BE-LABEL: trunc_i64_to_i32_le:
+; BE: // %bb.0:
+; BE-NEXT: fmov d0, x0
+; BE-NEXT: rev64 v0.4s, v0.4s
+; BE-NEXT: fmov w0, s0
+; BE-NEXT: ret
+;
+; LE-LABEL: trunc_i64_to_i32_le:
+; LE: // %bb.0:
+; LE-NEXT: fmov d0, x0
+; LE-NEXT: fmov w0, s0
+; LE-NEXT: ret
+ %ins = insertelement <2 x i64> undef, i64 %x, i32 0
+ %bc = bitcast <2 x i64> %ins to <4 x i32>
+ %ext = extractelement <4 x i32> %bc, i32 0
+ ret i32 %ext
+}
+
+define i32 @trunc_i64_to_i32_be(i64 %x) {
+; BE-LABEL: trunc_i64_to_i32_be:
+; BE: // %bb.0:
+; BE-NEXT: fmov d0, x0
+; BE-NEXT: rev64 v0.4s, v0.4s
+; BE-NEXT: mov w0, v0.s[1]
+; BE-NEXT: ret
+;
+; LE-LABEL: trunc_i64_to_i32_be:
+; LE: // %bb.0:
+; LE-NEXT: fmov d0, x0
+; LE-NEXT: mov w0, v0.s[1]
+; LE-NEXT: ret
+ %ins = insertelement <2 x i64> undef, i64 %x, i32 0
+ %bc = bitcast <2 x i64> %ins to <4 x i32>
+ %ext = extractelement <4 x i32> %bc, i32 1
+ ret i32 %ext
+}
+
+define i16 @trunc_i64_to_i16_le(i64 %x) {
+; BE-LABEL: trunc_i64_to_i16_le:
+; BE: // %bb.0:
+; BE-NEXT: fmov d0, x0
+; BE-NEXT: rev64 v0.8h, v0.8h
+; BE-NEXT: umov w0, v0.h[0]
+; BE-NEXT: ret
+;
+; LE-LABEL: trunc_i64_to_i16_le:
+; LE: // %bb.0:
+; LE-NEXT: fmov d0, x0
+; LE-NEXT: umov w0, v0.h[0]
+; LE-NEXT: ret
+ %ins = insertelement <2 x i64> undef, i64 %x, i32 0
+ %bc = bitcast <2 x i64> %ins to <8 x i16>
+ %ext = extractelement <8 x i16> %bc, i32 0
+ ret i16 %ext
+}
+
+define i16 @trunc_i64_to_i16_be(i64 %x) {
+; BE-LABEL: trunc_i64_to_i16_be:
+; BE: // %bb.0:
+; BE-NEXT: fmov d0, x0
+; BE-NEXT: rev64 v0.8h, v0.8h
+; BE-NEXT: umov w0, v0.h[3]
+; BE-NEXT: ret
+;
+; LE-LABEL: trunc_i64_to_i16_be:
+; LE: // %bb.0:
+; LE-NEXT: fmov d0, x0
+; LE-NEXT: umov w0, v0.h[3]
+; LE-NEXT: ret
+ %ins = insertelement <2 x i64> undef, i64 %x, i32 0
+ %bc = bitcast <2 x i64> %ins to <8 x i16>
+ %ext = extractelement <8 x i16> %bc, i32 3
+ ret i16 %ext
+}
+
+define i8 @trunc_i32_to_i8_le(i32 %x) {
+; BE-LABEL: trunc_i32_to_i8_le:
+; BE: // %bb.0:
+; BE-NEXT: fmov s0, w0
+; BE-NEXT: rev32 v0.16b, v0.16b
+; BE-NEXT: umov w0, v0.b[0]
+; BE-NEXT: ret
+;
+; LE-LABEL: trunc_i32_to_i8_le:
+; LE: // %bb.0:
+; LE-NEXT: fmov s0, w0
+; LE-NEXT: umov w0, v0.b[0]
+; LE-NEXT: ret
+ %ins = insertelement <4 x i32> undef, i32 %x, i32 0
+ %bc = bitcast <4 x i32> %ins to <16 x i8>
+ %ext = extractelement <16 x i8> %bc, i32 0
+ ret i8 %ext
+}
+
+define i8 @trunc_i32_to_i8_be(i32 %x) {
+; BE-LABEL: trunc_i32_to_i8_be:
+; BE: // %bb.0:
+; BE-NEXT: fmov s0, w0
+; BE-NEXT: rev32 v0.16b, v0.16b
+; BE-NEXT: umov w0, v0.b[3]
+; BE-NEXT: ret
+;
+; LE-LABEL: trunc_i32_to_i8_be:
+; LE: // %bb.0:
+; LE-NEXT: fmov s0, w0
+; LE-NEXT: umov w0, v0.b[3]
+; LE-NEXT: ret
+ %ins = insertelement <4 x i32> undef, i32 %x, i32 0
+ %bc = bitcast <4 x i32> %ins to <16 x i8>
+ %ext = extractelement <16 x i8> %bc, i32 3
+ ret i8 %ext
+}
+
}
; TODO: This should have folded to avoid vector ops, but the transform
-; is guarded by 'hasOneUse'. That limitation apparently makes some AMDGPU
+; is guarded by 'hasOneUse'. That limitation apparently makes some AMDGPU
; codegen better.
define i8 @extractelt_bitcast_extra_use(i32 %x, <4 x i8>* %p) nounwind {
ret i8 %ext
}
+define i32 @trunc_i64_to_i32_le(i64 %x) {
+; X86-LABEL: trunc_i64_to_i32_le:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: retl
+;
+; X64-LABEL: trunc_i64_to_i32_le:
+; X64: # %bb.0:
+; X64-NEXT: movq %rdi, %xmm0
+; X64-NEXT: movd %xmm0, %eax
+; X64-NEXT: retq
+ %ins = insertelement <2 x i64> undef, i64 %x, i32 0
+ %bc = bitcast <2 x i64> %ins to <4 x i32>
+ %ext = extractelement <4 x i32> %bc, i32 0
+ ret i32 %ext
+}
+
+define i16 @trunc_i64_to_i16_le(i64 %x) {
+; X86-LABEL: trunc_i64_to_i16_le:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: # kill: def $ax killed $ax killed $eax
+; X86-NEXT: retl
+;
+; X64-LABEL: trunc_i64_to_i16_le:
+; X64: # %bb.0:
+; X64-NEXT: movq %rdi, %xmm0
+; X64-NEXT: movd %xmm0, %eax
+; X64-NEXT: # kill: def $ax killed $ax killed $eax
+; X64-NEXT: retq
+ %ins = insertelement <2 x i64> undef, i64 %x, i32 0
+ %bc = bitcast <2 x i64> %ins to <8 x i16>
+ %ext = extractelement <8 x i16> %bc, i32 0
+ ret i16 %ext
+}
+
+define i8 @trunc_i32_to_i8_le(i32 %x) {
+; X86-LABEL: trunc_i32_to_i8_le:
+; X86: # %bb.0:
+; X86-NEXT: movb {{[0-9]+}}(%esp), %al
+; X86-NEXT: retl
+;
+; X64-LABEL: trunc_i32_to_i8_le:
+; X64: # %bb.0:
+; X64-NEXT: movl %edi, %eax
+; X64-NEXT: # kill: def $al killed $al killed $eax
+; X64-NEXT: retq
+ %ins = insertelement <4 x i32> undef, i32 %x, i32 0
+ %bc = bitcast <4 x i32> %ins to <16 x i8>
+ %ext = extractelement <16 x i8> %bc, i32 0
+ ret i8 %ext
+}
+