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From: Michael Forney <mforney@mforney.org>
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X-Bullshit: immutable abstract replication 
Subject: [9front] cc: fix comparison warning with constant LHS
Reply-To: 9front@9front.org
Precedence: bulk

This prevents an incorrect warning for a comparison such as `0 < x`,
where x is an unsigned type.  Previously, this would get normalized as
`x >= 0` rather than `x > 0` when checking the comparison.

diff -r a347b0b9f57e -r 11c719e3c471 sys/src/cmd/cc/com.c
--- a/sys/src/cmd/cc/com.c	Mon Jan 18 17:55:01 2021 -0800
+++ b/sys/src/cmd/cc/com.c	Wed Jan 20 01:29:03 2021 -0800
@@ -1405,7 +1405,7 @@
 	if(reverse){
 		r = n->left;
 		l = n->right;
-		op = comrel[relindex(n->op)];
+		op = invrel[relindex(n->op)];
 	}else{
 		l = n->left;
 		r = n->right;