From 27bd1ef100a81235e9d2763c4cf24699251a8008 Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Fri, 26 Sep 2014 09:07:44 -0400
Subject: Comment-out dead code in ed25519/ref10

There are some loops of the form

       for (i=1;i<1;++i) ...

And of course, if the loop index is initialized to 1, it will never
be less than 1, and the loop body will never be executed.  This
upsets coverity.

Patch fixes CID 1221543 and 1221542
---
 src/ext/ed25519/ref10/pow22523.h  | 5 +++--
 src/ext/ed25519/ref10/pow225521.h | 5 +++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/ext/ed25519/ref10/pow22523.h b/src/ext/ed25519/ref10/pow22523.h
index 60ffe0d34c..9204ff838f 100644
--- a/src/ext/ed25519/ref10/pow22523.h
+++ b/src/ext/ed25519/ref10/pow22523.h
@@ -1,3 +1,4 @@
+/* Modified by Tor: pointless loops removed to appease analysis tools */
 
 /* qhasm: fe z1 */
 
@@ -50,7 +51,7 @@
 /* qhasm: z2 = z1^2^1 */
 /* asm 1: fe_sq(>z2=fe#1,<z1=fe#11); for (i = 1;i < 1;++i) fe_sq(>z2=fe#1,>z2=fe#1); */
 /* asm 2: fe_sq(>z2=t0,<z1=z); for (i = 1;i < 1;++i) fe_sq(>z2=t0,>z2=t0); */
-fe_sq(t0,z); for (i = 1;i < 1;++i) fe_sq(t0,t0);
+fe_sq(t0,z); /* DEADCODE This loop has no effect:  for (i = 1;i < 1;++i) fe_sq(t0,t0); */
 
 /* qhasm: z8 = z2^2^2 */
 /* asm 1: fe_sq(>z8=fe#2,<z2=fe#1); for (i = 1;i < 2;++i) fe_sq(>z8=fe#2,>z8=fe#2); */
@@ -70,7 +71,7 @@ fe_mul(t0,t0,t1);
 /* qhasm: z22 = z11^2^1 */
 /* asm 1: fe_sq(>z22=fe#1,<z11=fe#1); for (i = 1;i < 1;++i) fe_sq(>z22=fe#1,>z22=fe#1); */
 /* asm 2: fe_sq(>z22=t0,<z11=t0); for (i = 1;i < 1;++i) fe_sq(>z22=t0,>z22=t0); */
-fe_sq(t0,t0); for (i = 1;i < 1;++i) fe_sq(t0,t0);
+fe_sq(t0,t0); /* DEADCODE This loop has no effect:  for (i = 1;i < 1;++i) fe_sq(t0,t0); */
 
 /* qhasm: z_5_0 = z9*z22 */
 /* asm 1: fe_mul(>z_5_0=fe#1,<z9=fe#2,<z22=fe#1); */
diff --git a/src/ext/ed25519/ref10/pow225521.h b/src/ext/ed25519/ref10/pow225521.h
index 109df779a2..fe2af94c03 100644
--- a/src/ext/ed25519/ref10/pow225521.h
+++ b/src/ext/ed25519/ref10/pow225521.h
@@ -1,3 +1,4 @@
+/* Modified by Tor: pointless loops removed to appease analysis tools */
 
 /* qhasm: fe z1 */
 
@@ -50,7 +51,7 @@
 /* qhasm: z2 = z1^2^1 */
 /* asm 1: fe_sq(>z2=fe#1,<z1=fe#11); for (i = 1;i < 1;++i) fe_sq(>z2=fe#1,>z2=fe#1); */
 /* asm 2: fe_sq(>z2=t0,<z1=z); for (i = 1;i < 1;++i) fe_sq(>z2=t0,>z2=t0); */
-fe_sq(t0,z); for (i = 1;i < 1;++i) fe_sq(t0,t0);
+fe_sq(t0,z); /* DEADCODE This loop has no effect:  for (i = 1;i < 1;++i) fe_sq(t0,t0); */
 
 /* qhasm: z8 = z2^2^2 */
 /* asm 1: fe_sq(>z8=fe#2,<z2=fe#1); for (i = 1;i < 2;++i) fe_sq(>z8=fe#2,>z8=fe#2); */
@@ -70,7 +71,7 @@ fe_mul(t0,t0,t1);
 /* qhasm: z22 = z11^2^1 */
 /* asm 1: fe_sq(>z22=fe#3,<z11=fe#1); for (i = 1;i < 1;++i) fe_sq(>z22=fe#3,>z22=fe#3); */
 /* asm 2: fe_sq(>z22=t2,<z11=t0); for (i = 1;i < 1;++i) fe_sq(>z22=t2,>z22=t2); */
-fe_sq(t2,t0); for (i = 1;i < 1;++i) fe_sq(t2,t2);
+fe_sq(t2,t0); /* DEADCODE This loop has no effect   for (i = 1;i < 1;++i) fe_sq(t2,t2); */
 
 /* qhasm: z_5_0 = z9*z22 */
 /* asm 1: fe_mul(>z_5_0=fe#2,<z9=fe#2,<z22=fe#3); */
-- 
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