---
 gcc/config/rs6000/mma.md | 42 ++++++++++++++++++++++++++++++++++------
 1 file changed, 36 insertions(+), 6 deletions(-)

diff --git a/gcc/config/rs6000/mma.md b/gcc/config/rs6000/mma.md
index 907c9d6d516..f76a87b4a21 100644
--- a/gcc/config/rs6000/mma.md
+++ b/gcc/config/rs6000/mma.md
@@ -268,10 +268,25 @@ (define_int_attr avvi4i4i4	[(UNSPEC_MMA_PMXVI8GER4PP	"pmxvi8ger4pp")
 (define_expand "movoo"
   [(set (match_operand:OO 0 "nonimmediate_operand")
 	(match_operand:OO 1 "input_operand"))]
-  "TARGET_MMA"
+  ""
 {
-  rs6000_emit_move (operands[0], operands[1], OOmode);
-  DONE;
+  if (TARGET_MMA) {
+    rs6000_emit_move (operands[0], operands[1], OOmode);
+    DONE;
+  }
+  /* Opaque modes are only expected to be available when MMA is supported,
+     but PR103353 shows we may want to continue to expand a MMA built-in
+     function like a normal function, even if we have already emitted
+     error messages about some missing required conditions.
+     As shown in that PR, without one explicit mov optab on OOmode provided,
+     it would call emit_move_insn recursively.  So we allow this pattern to
+     be generated when we are expanding to RTL and have seen errors, even
+     though there is no MMA support.  It would not cause further ICEs as
+     the compilation would stop soon after expanding.  */
+  else if (currently_expanding_to_rtl && seen_error ())
+    ;
+  else
+    gcc_unreachable ();
 })
 
 (define_insn_and_split "*movoo"
@@ -300,10 +315,25 @@ (define_insn_and_split "*movoo"
 (define_expand "movxo"
   [(set (match_operand:XO 0 "nonimmediate_operand")
 	(match_operand:XO 1 "input_operand"))]
-  "TARGET_MMA"
+  ""
 {
-  rs6000_emit_move (operands[0], operands[1], XOmode);
-  DONE;
+  if (TARGET_MMA) {
+    rs6000_emit_move (operands[0], operands[1], XOmode);
+    DONE;
+  }
+  /* Opaque modes are only expected to be available when MMA is supported,
+     but PR103353 shows we may want to continue to expand a MMA built-in
+     function like a normal function, even if we have already emitted
+     error messages about some missing required conditions.
+     As shown in that PR, without one explicit mov optab on OOmode provided,
+     it would call emit_move_insn recursively.  So we allow this pattern to
+     be generated when we are expanding to RTL and have seen errors, even
+     though there is no MMA support.  It would not cause further ICEs as
+     the compilation would stop soon after expanding.  */
+  else if (currently_expanding_to_rtl && seen_error ())
+    ;
+  else
+    gcc_unreachable ();
 })
 
 (define_insn_and_split "*movxo"
-- 
2.25.1