Remove the "invalid" stacking rule.

When ncg fell back on this rule, it did emit the string "invalid" in
the assembly code and caused a syntax error in the assembler.

Adjust the stacking rules so we can stack LOCAL, CONST, and LABEL
without falling back on the "invalid" rule, and so we can stack them
when we have no free register except the scratch register.

diff --git a/mach/powerpc/ncg/table b/mach/powerpc/ncg/table
index 60cf93c..547fe07 100644 (file)
--- a/mach/powerpc/ncg/table
+++ b/mach/powerpc/ncg/table
@@ -233,7 +233,6 @@ TOKENS
 
 SETS
 
-       TOKEN              = LABEL + CONST + LOCAL.
        GPRI               = GPR + GPRE.
        
        SUM_ALL            = SUM_RC + SUM_RR.
@@ -348,8 +347,7 @@ INSTRUCTIONS
   gpr_ro_gpr_gpr  GPRI:ro, GPRI:ro, GPRI:ro.
   gpr_wo_gprindirect GPRI:wo, GPRINDIRECT:ro.
   gpr_wo_gpr_gpr  GPRI:wo, GPRI:ro, GPRI:ro.
-  
-  invalid "invalid".
+
   comment "!" LABEL+LABELI:ro.
 
 
@@ -753,25 +751,28 @@ TESTS
 
 
 STACKINGRULES
-       
+
+       from LOCAL to STACK
+               gen
+                       COMMENT("stack LOCAL")
+                       stwu {GPRE, regvar(%1.off)}, {GPRINDIRECT, SP, 0-4}
+
        from GPR to STACK
                gen
                        COMMENT("stack GPR")
                        stwu %1, {GPRINDIRECT, SP, 0-4}
        
        from CONST to STACK
-               uses REG
                gen
                        COMMENT("stack CONST")
-                       move %1, %a
-                       stwu %a, {GPRINDIRECT, SP, 0-4}
+                       move %1, SCRATCH
+                       stwu SCRATCH, {GPRINDIRECT, SP, 0-4}
                        
        from LABEL to STACK
-               uses REG
                gen
                        COMMENT("stack LABEL")
-                       move %1, {GPRE, %a}
-                       stwu %a, {GPRINDIRECT, SP, 0-4}
+                       move %1, SCRATCH
+                       stwu SCRATCH, {GPRINDIRECT, SP, 0-4}
                        
        from SEX_B to STACK
                gen
@@ -809,13 +810,9 @@ STACKINGRULES
                gen
                        COMMENT("stack FSREG")
                        stfsu %1, {GPRINDIRECT, SP, 0-4}
-                       
-       from TOKEN to STACK
-               gen
-                       invalid.
-                       
-               
-               
+
+
+
 COERCIONS
 
        from REG