[committed] PR jit/66779: fix segfault

diff --git a/gcc/jit/dummy-frontend.c b/gcc/jit/dummy-frontend.c
index 8001382..3ddab50 100644
--- a/gcc/jit/dummy-frontend.c
+++ b/gcc/jit/dummy-frontend.c
@@ -154,6 +154,17 @@  jit_langhook_type_for_mode (enum machine_mode mode, int unsignedp)
   if (mode == TYPE_MODE (double_type_node))
     return double_type_node;
 
+  if (mode == TYPE_MODE (intQI_type_node))
+    return unsignedp ? unsigned_intQI_type_node : intQI_type_node;
+  if (mode == TYPE_MODE (intHI_type_node))
+    return unsignedp ? unsigned_intHI_type_node : intHI_type_node;
+  if (mode == TYPE_MODE (intSI_type_node))
+    return unsignedp ? unsigned_intSI_type_node : intSI_type_node;
+  if (mode == TYPE_MODE (intDI_type_node))
+    return unsignedp ? unsigned_intDI_type_node : intDI_type_node;
+  if (mode == TYPE_MODE (intTI_type_node))
+    return unsignedp ? unsigned_intTI_type_node : intTI_type_node;
+
   if (mode == TYPE_MODE (integer_type_node))
     return unsignedp ? unsigned_type_node : integer_type_node;
 
diff --git a/gcc/testsuite/jit.dg/all-non-failing-tests.h b/gcc/testsuite/jit.dg/all-non-failing-tests.h
index 21ff428..463eefb 100644
--- a/gcc/testsuite/jit.dg/all-non-failing-tests.h
+++ b/gcc/testsuite/jit.dg/all-non-failing-tests.h
@@ -161,6 +161,13 @@ 
 #undef create_code
 #undef verify_code
 
+/* test-pr66779.c */
+#define create_code create_code_pr66779
+#define verify_code verify_code_pr66779
+#include "test-pr66779.c"
+#undef create_code
+#undef verify_code
+
 /* test-reading-struct.c */
 #define create_code create_code_reading_struct
 #define verify_code verify_code_reading_struct
@@ -289,6 +296,9 @@  const struct testcase testcases[] = {
   {"pr66700_observing_write_through_ptr",
    create_code_pr66700_observing_write_through_ptr,
    verify_code_pr66700_observing_write_through_ptr},
+  {"pr66779",
+   create_code_pr66779,
+   verify_code_pr66779},
   {"reading_struct ",
    create_code_reading_struct ,
    verify_code_reading_struct },
diff --git a/gcc/testsuite/jit.dg/test-pr66779.c b/gcc/testsuite/jit.dg/test-pr66779.c
new file mode 100644
index 0000000..ac5a72b
--- /dev/null
+++ b/gcc/testsuite/jit.dg/test-pr66779.c
@@ -0,0 +1,143 @@ 
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "libgccjit.h"
+
+#include "harness.h"
+
+/* Reproducer for PR jit/66779.
+
+   Inject the equivalent of:
+     T FUNCNAME (T i, T j, T k)
+     {
+       bool comp0 = i & 0x40;
+       bool comp1 = (j == k);
+       if (comp0 && comp1)
+	 return 7;
+       else
+	 return 22;
+     }
+   for some type T; this was segfaulting during the expansion to RTL
+   due to missing handling for some machine modes in
+   jit_langhook_type_for_mode.  */
+
+void
+create_fn (gcc_jit_context *ctxt,
+	   const char *funcname,
+	   enum gcc_jit_types jit_type)
+{
+  gcc_jit_type *the_type =
+    gcc_jit_context_get_type (ctxt, jit_type);
+  gcc_jit_type *t_bool =
+    gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_BOOL);
+  gcc_jit_param *param_i =
+    gcc_jit_context_new_param (ctxt, NULL, the_type, "i");
+  gcc_jit_param *param_j =
+    gcc_jit_context_new_param (ctxt, NULL, the_type, "j");
+  gcc_jit_param *param_k =
+    gcc_jit_context_new_param (ctxt, NULL, the_type, "k");
+  gcc_jit_param *params[3] = {
+    param_i,
+    param_j,
+    param_k
+  };
+  gcc_jit_function *func =
+    gcc_jit_context_new_function (ctxt, NULL,
+				  GCC_JIT_FUNCTION_EXPORTED,
+				  the_type,
+				  funcname,
+				  3, params,
+				  0);
+  gcc_jit_block *b_entry = gcc_jit_function_new_block (func, "entry");
+  gcc_jit_block *b_on_true = gcc_jit_function_new_block (func, "on_true");
+  gcc_jit_block *b_on_false = gcc_jit_function_new_block (func, "on_false");
+
+  gcc_jit_lvalue *comp0 =
+    gcc_jit_function_new_local (func, NULL, t_bool, "comp0");
+
+  gcc_jit_block_add_assignment (
+    b_entry, NULL,
+    comp0,
+    gcc_jit_context_new_comparison (
+      ctxt, NULL,
+      GCC_JIT_COMPARISON_NE,
+      gcc_jit_context_new_binary_op (
+	ctxt, NULL,
+	GCC_JIT_BINARY_OP_BITWISE_AND,
+	the_type,
+	gcc_jit_param_as_rvalue (param_i),
+	gcc_jit_context_new_rvalue_from_int (ctxt, the_type, 0x40)),
+      gcc_jit_context_zero (ctxt, the_type)));
+
+  gcc_jit_lvalue *comp1 =
+    gcc_jit_function_new_local (func, NULL, t_bool, "comp1");
+
+  gcc_jit_block_add_assignment (
+    b_entry, NULL,
+    comp1,
+    gcc_jit_context_new_comparison (ctxt, NULL,
+				    GCC_JIT_COMPARISON_EQ,
+				    gcc_jit_param_as_rvalue (param_j),
+				    gcc_jit_param_as_rvalue (param_k)));
+
+ gcc_jit_rvalue *cond =
+   gcc_jit_context_new_binary_op (ctxt, NULL,
+				  GCC_JIT_BINARY_OP_LOGICAL_AND,
+				  t_bool,
+				  gcc_jit_lvalue_as_rvalue (comp0),
+				  gcc_jit_lvalue_as_rvalue (comp1));
+
+  gcc_jit_block_end_with_conditional (b_entry, NULL,
+				      cond,
+				      b_on_true,
+				      b_on_false);
+
+  gcc_jit_block_end_with_return (
+    b_on_true, NULL,
+    gcc_jit_context_new_rvalue_from_int (ctxt, the_type, 7));
+
+  gcc_jit_block_end_with_return (
+    b_on_false, NULL,
+    gcc_jit_context_new_rvalue_from_int (ctxt, the_type, 22));
+}
+
+void
+create_code (gcc_jit_context *ctxt, void *user_data)
+{
+  create_fn (ctxt, "pr66779_signed_char", GCC_JIT_TYPE_SIGNED_CHAR);
+  create_fn (ctxt, "pr66779_unsigned_char", GCC_JIT_TYPE_UNSIGNED_CHAR);
+
+  create_fn (ctxt, "pr66779_short", GCC_JIT_TYPE_SHORT);
+  create_fn (ctxt, "pr66779_unsigned_short", GCC_JIT_TYPE_UNSIGNED_SHORT);
+
+  create_fn (ctxt, "pr66779_int", GCC_JIT_TYPE_INT);
+  create_fn (ctxt, "pr66779_unsigned_int", GCC_JIT_TYPE_UNSIGNED_INT);
+
+  create_fn (ctxt, "pr66779_long", GCC_JIT_TYPE_LONG);
+  create_fn (ctxt, "pr66779_unsigned_long", GCC_JIT_TYPE_UNSIGNED_LONG);
+
+  create_fn (ctxt, "pr66779_long_long",
+	     GCC_JIT_TYPE_LONG_LONG);
+  create_fn (ctxt, "pr66779_unsigned_long_long",
+	     GCC_JIT_TYPE_UNSIGNED_LONG_LONG);
+
+  create_fn (ctxt, "pr66779_size_t", GCC_JIT_TYPE_SIZE_T);
+}
+
+extern void
+verify_code (gcc_jit_context *ctxt, gcc_jit_result *result)
+{
+  typedef int (*fn_type) (int, int, int);
+  CHECK_NON_NULL (result);
+  /* Sanity-check the "int" case.  */
+  fn_type fn =
+    (fn_type)gcc_jit_result_get_code (result, "pr66779_int");
+  CHECK_NON_NULL (fn);
+  CHECK_VALUE (fn (0, 0, 0), 22);
+  CHECK_VALUE (fn (0, 0, 1), 22);
+  CHECK_VALUE (fn (0x40, 0, 0), 7);
+  CHECK_VALUE (fn (0x40, 0, 1), 22);
+  CHECK_VALUE (fn (0x40, 1, 1), 7);
+  CHECK_VALUE (fn (0x3f, 0, 0), 22);
+  CHECK_VALUE (fn (0x3f, 1, 1), 22);
+}