gcc/

	PR target/49030
	* config/arm/arm-protos.h (maybe_get_arm_condition_code): Declare.
	* config/arm/arm.c (maybe_get_arm_condition_code): New function,
	reusing the old code from get_arm_condition_code.  Return ARM_NV
	for invalid comparison codes.
	(get_arm_condition_code): Redefine in terms of
	maybe_get_arm_condition_code.
	* config/arm/predicates.md (arm_comparison_operator): Use
	maybe_get_arm_condition_code.

gcc/testsuite/
	PR target/49030
	* gcc.dg/torture/pr49030.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@178636 138bc75d-0d04-0410-961f-82ee72b054a4

3 files changed, 29 insertions, 20 deletions

diff --git a/gcc/config/arm/arm-protos.h b/gcc/config/arm/arm-protos.h
index 4093c5688c4..9030e96052e 100644
--- a/gcc/config/arm/arm-protos.h
+++ b/gcc/config/arm/arm-protos.h
@@ -184,6 +184,7 @@ extern int is_called_in_ARM_mode (tree);
 #endif
 extern int thumb_shiftable_const (unsigned HOST_WIDE_INT);
 #ifdef RTX_CODE
+extern enum arm_cond_code maybe_get_arm_condition_code (rtx);
 extern void thumb1_final_prescan_insn (rtx);
 extern void thumb2_final_prescan_insn (rtx);
 extern const char *thumb_load_double_from_address (rtx *);
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 0a1a6518a1c..6311612a6cd 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -17595,10 +17595,10 @@ arm_elf_asm_destructor (rtx symbol, int priority)
    decremented/zeroed by arm_asm_output_opcode as the insns are output.  */
 
 /* Returns the index of the ARM condition code string in
-   `arm_condition_codes'.  COMPARISON should be an rtx like
-   `(eq (...) (...))'.  */
-static enum arm_cond_code
-get_arm_condition_code (rtx comparison)
+   `arm_condition_codes', or ARM_NV if the comparison is invalid.
+   COMPARISON should be an rtx like `(eq (...) (...))'.  */
+enum arm_cond_code
+maybe_get_arm_condition_code (rtx comparison)
 {
   enum machine_mode mode = GET_MODE (XEXP (comparison, 0));
   enum arm_cond_code code;
@@ -17622,11 +17622,11 @@ get_arm_condition_code (rtx comparison)
     case CC_DLTUmode: code = ARM_CC;
 
     dominance:
-      gcc_assert (comp_code == EQ || comp_code == NE);
-
       if (comp_code == EQ)
 	return ARM_INVERSE_CONDITION_CODE (code);
-      return code;
+      if (comp_code == NE)
+	return code;
+      return ARM_NV;
 
     case CC_NOOVmode:
       switch (comp_code)
@@ -17635,7 +17635,7 @@ get_arm_condition_code (rtx comparison)
 	case EQ: return ARM_EQ;
 	case GE: return ARM_PL;
 	case LT: return ARM_MI;
-	default: gcc_unreachable ();
+	default: return ARM_NV;
 	}
 
     case CC_Zmode:
@@ -17643,7 +17643,7 @@ get_arm_condition_code (rtx comparison)
 	{
 	case NE: return ARM_NE;
 	case EQ: return ARM_EQ;
-	default: gcc_unreachable ();
+	default: return ARM_NV;
 	}
 
     case CC_Nmode:
@@ -17651,7 +17651,7 @@ get_arm_condition_code (rtx comparison)
 	{
 	case NE: return ARM_MI;
 	case EQ: return ARM_PL;
-	default: gcc_unreachable ();
+	default: return ARM_NV;
 	}
 
     case CCFPEmode:
@@ -17676,7 +17676,7 @@ get_arm_condition_code (rtx comparison)
 	  /* UNEQ and LTGT do not have a representation.  */
 	case UNEQ: /* Fall through.  */
 	case LTGT: /* Fall through.  */
-	default: gcc_unreachable ();
+	default: return ARM_NV;
 	}
 
     case CC_SWPmode:
@@ -17692,7 +17692,7 @@ get_arm_condition_code (rtx comparison)
 	case GTU: return ARM_CC;
 	case LEU: return ARM_CS;
 	case LTU: return ARM_HI;
-	default: gcc_unreachable ();
+	default: return ARM_NV;
 	}
 
     case CC_Cmode:
@@ -17700,7 +17700,7 @@ get_arm_condition_code (rtx comparison)
 	{
 	case LTU: return ARM_CS;
 	case GEU: return ARM_CC;
-	default: gcc_unreachable ();
+	default: return ARM_NV;
 	}
 
     case CC_CZmode:
@@ -17712,7 +17712,7 @@ get_arm_condition_code (rtx comparison)
 	case GTU: return ARM_HI;
 	case LEU: return ARM_LS;
 	case LTU: return ARM_CC;
-	default: gcc_unreachable ();
+	default: return ARM_NV;
 	}
 
     case CC_NCVmode:
@@ -17722,7 +17722,7 @@ get_arm_condition_code (rtx comparison)
 	case LT: return ARM_LT;
 	case GEU: return ARM_CS;
 	case LTU: return ARM_CC;
-	default: gcc_unreachable ();
+	default: return ARM_NV;
 	}
 
     case CCmode:
@@ -17738,13 +17738,22 @@ get_arm_condition_code (rtx comparison)
 	case GTU: return ARM_HI;
 	case LEU: return ARM_LS;
 	case LTU: return ARM_CC;
-	default: gcc_unreachable ();
+	default: return ARM_NV;
 	}
 
     default: gcc_unreachable ();
     }
 }
 
+/* Like maybe_get_arm_condition_code, but never return ARM_NV.  */
+static enum arm_cond_code
+get_arm_condition_code (rtx comparison)
+{
+  enum arm_cond_code code = maybe_get_arm_condition_code (comparison);
+  gcc_assert (code != ARM_NV);
+  return code;
+}
+
 /* Tell arm_asm_output_opcode to output IT blocks for conditionally executed
    instructions.  */
 void
diff --git a/gcc/config/arm/predicates.md b/gcc/config/arm/predicates.md
index cfe8d33696d..c7d6206b138 100644
--- a/gcc/config/arm/predicates.md
+++ b/gcc/config/arm/predicates.md
@@ -249,10 +249,9 @@
 ;; True for integer comparisons and, if FP is active, for comparisons
 ;; other than LTGT or UNEQ.
 (define_special_predicate "arm_comparison_operator"
-  (ior (match_code "eq,ne,le,lt,ge,gt,geu,gtu,leu,ltu")
-       (and (match_test "TARGET_32BIT && TARGET_HARD_FLOAT
-			 && (TARGET_FPA || TARGET_VFP)")
-            (match_code "unordered,ordered,unlt,unle,unge,ungt"))))
+  (and (match_code "eq,ne,le,lt,ge,gt,geu,gtu,leu,ltu,
+		    unordered,ordered,unlt,unle,unge,ungt")
+       (match_test "maybe_get_arm_condition_code (op) != ARM_NV")))
 
 (define_special_predicate "lt_ge_comparison_operator"
   (match_code "lt,ge"))