From: George Koehler <xkernigh@netscape.net>
Date: Sun, 15 Oct 2017 19:22:52 +0000 (-0400)
Subject: PowerPC ncg never uses the rules to stack LOCAL or DLOCAL.
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=f0619ea4ae98901ab87a0cd8ab09f35010e53f63;p=ack.git

PowerPC ncg never uses the rules to stack LOCAL or DLOCAL.
---

diff --git a/mach/powerpc/ncg/table b/mach/powerpc/ncg/table
index 23b904264..a116209d9 100644
--- a/mach/powerpc/ncg/table
+++ b/mach/powerpc/ncg/table
@@ -328,6 +328,7 @@ INSTRUCTIONS
   xori            GPR:wo, GPR:ro, CONST:ro.
   xoris           GPR:wo, GPR:ro, CONST:ro.
 
+  bug ">>> BUG"           LABEL:ro cost(0, 0).
   comment "!"             LABEL:ro cost(0, 0).
 
 
@@ -588,16 +589,6 @@ TESTS
 
 STACKINGRULES
 
-	from LOCAL inreg(%off)==reg_float to STACK
-		gen
-			COMMENT("stack LOCAL")
-			stfsu %1, {IND_RC_W, sp, 0-4}
-
-	from LOCAL to STACK
-		gen
-			COMMENT("stack LOCAL")
-			stwu %1, {IND_RC_W, sp, 0-4}
-
 	from REG to STACK
 		gen
 			COMMENT("stack REG")
@@ -615,7 +606,7 @@ STACKINGRULES
 			move %1, FSCRATCH
 			stfdu FSCRATCH, {IND_RC_D, sp, 0-8}
 
-	from FREG+DLOCAL to STACK
+	from FREG to STACK
 		gen
 			COMMENT("stack FREG+DLOCAL")
 			stfdu %1, {IND_RC_D, sp, 0-8}
@@ -625,6 +616,16 @@ STACKINGRULES
 			COMMENT("stack FSREG")
 			stfsu %1, {IND_RC_W, sp, 0-4}
 
+	/*
+	 * We never stack LOCAL or DLOCAL tokens, because we only use
+	 * them for register variables, so ncg pushes the register,
+	 * not the token.  These rules only prevent an error in ncgg.
+	 */
+	from LOCAL to STACK
+		gen bug {LABEL, "STACKING LOCAL"}
+	from DLOCAL to STACK
+		gen bug {LABEL, "STACKING DLOCAL"}
+
 
 
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