diff --git a/basis/compiler/cfg/intrinsics/simd/backend/backend.factor b/basis/compiler/cfg/intrinsics/simd/backend/backend.factor
index f2ba9af41d..1a229672b9 100644
--- a/basis/compiler/cfg/intrinsics/simd/backend/backend.factor
+++ b/basis/compiler/cfg/intrinsics/simd/backend/backend.factor
@@ -3,7 +3,7 @@ USING: accessors arrays assocs classes combinators
 combinators.short-circuit compiler.cfg.builder.blocks
 compiler.cfg.registers compiler.cfg.stacks
 compiler.cfg.stacks.local compiler.tree.propagation.info
-cpu.architecture effects fry generalizations help.lint.checks
+cpu.architecture effects fry generalizations
 kernel locals macros math namespaces quotations sequences
 splitting stack-checker words ;
 IN: compiler.cfg.intrinsics.simd.backend
@@ -145,6 +145,12 @@ CONSTANT: can-has-words
 
 ! Intrinsic code emission
 
+MACRO: check-elements ( quots -- )
+    [ length '[ _ firstn ] ]
+    [ '[ _ spread ] ]
+    [ length 1 - \ and <repetition> [ ] like ]
+    tri 3append ;
+
 MACRO: if-literals-match ( quots -- )
     [ length ] [ ] [ length ] tri
     ! n quots n
diff --git a/basis/compiler/cfg/intrinsics/simd/simd-tests.factor b/basis/compiler/cfg/intrinsics/simd/simd-tests.factor
index 27b3b38b01..2d38e541a4 100644
--- a/basis/compiler/cfg/intrinsics/simd/simd-tests.factor
+++ b/basis/compiler/cfg/intrinsics/simd/simd-tests.factor
@@ -1,9 +1,9 @@
 ! (c)2009 Joe Groff bsd license
 USING: arrays assocs biassocs byte-arrays byte-arrays.hex
-classes compiler.cfg.comparisons compiler.cfg.instructions
+classes compiler.cfg compiler.cfg.comparisons compiler.cfg.instructions
 compiler.cfg.intrinsics.simd compiler.cfg.registers
-compiler.cfg.stacks.local compiler.tree
-compiler.tree.propagation.info cpu.architecture fry kernel
+compiler.cfg.stacks.height compiler.cfg.stacks.local compiler.tree
+compiler.tree.propagation.info cpu.architecture fry hashtables kernel
 locals make namespaces sequences system tools.test words ;
 IN: compiler.cfg.intrinsics.simd.tests
 
@@ -34,8 +34,25 @@ IN: compiler.cfg.intrinsics.simd.tests
         } }
     } ;
 
+: test-node-nonliteral-rep ( -- node )
+    T{ #call
+        { in-d  { 1 2 3 4 } }
+        { out-d { 5 } }
+        { info H{
+            { 1 T{ value-info { class byte-array } } }
+            { 2 T{ value-info { class byte-array } } }
+            { 3 T{ value-info { class byte-array } } }
+            { 4 T{ value-info { class object } } }
+            { 5 T{ value-info { class byte-array } } }
+        } }
+    } ;
+
 : test-compiler-env ( -- x )
     H{ } clone
+        T{ basic-block { id 0 } }
+            [ \ basic-block pick set-at ]
+            [ 0 swap associate \ ds-heights pick set-at ]
+            [ 0 swap associate \ rs-heights pick set-at ] tri
         T{ current-height { d 0 } { r 0 } { emit-d 0 } { emit-r 0 } } \ current-height pick set-at
         H{ } clone \ local-peek-set pick set-at
         H{ } clone \ replace-mapping pick set-at
@@ -61,6 +78,13 @@ IN: compiler.cfg.intrinsics.simd.tests
         ] with-variable
     ] make-classes ; inline
 
+: test-emit-nonliteral-rep ( cpu quot -- node )
+    [
+        [ new \ cpu ] dip '[
+            test-compiler-env [ test-node-nonliteral-rep @ ] bind
+        ] with-variable
+    ] make-classes ; inline
+
 CONSTANT: signed-reps
     { char-16-rep short-8-rep int-4-rep longlong-2-rep float-4-rep double-2-rep }
 CONSTANT: all-reps
@@ -504,5 +528,19 @@ unit-test
 
 ! select
 [ { ##shuffle-vector-imm ##vector>scalar } ]
-[ shuffle-imm-cpu int-4-rep [ emit-simd-select ] test-emit ]
+[ shuffle-imm-cpu 1 int-4-rep [ emit-simd-select ] test-emit-literal ]
 unit-test
+
+! test with nonliteral/invalid reps
+[ { ##inc-d ##branch } ]
+[ simple-ops-cpu [ emit-simd-v+ ] test-emit-nonliteral-rep ]
+unit-test
+
+[ { ##branch } ]
+[ simple-ops-cpu f [ emit-simd-v+ ] test-emit ]
+unit-test
+
+[ { ##branch } ]
+[ simple-ops-cpu 3 [ emit-simd-v+ ] test-emit ]
+unit-test
+