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Remove dead stores.

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Found by the Clang static analyzer.
This commit is contained in:
Guus Sliepen 2017-04-18 20:07:33 +02:00
parent 70fed5f7ff
commit be8e5cbd1c
1 changed files with 0 additions and 24 deletions
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24
src/ed25519/sc.c
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@ -81,42 +81,36 @@ void sc_reduce(unsigned char *s) {
s14 -= s23 * 997805; s14 -= s23 * 997805;
s15 += s23 * 136657; s15 += s23 * 136657;
s16 -= s23 * 683901; s16 -= s23 * 683901;
s23 = 0;
s10 += s22 * 666643; s10 += s22 * 666643;
s11 += s22 * 470296; s11 += s22 * 470296;
s12 += s22 * 654183; s12 += s22 * 654183;
s13 -= s22 * 997805; s13 -= s22 * 997805;
s14 += s22 * 136657; s14 += s22 * 136657;
s15 -= s22 * 683901; s15 -= s22 * 683901;
s22 = 0;
s9 += s21 * 666643; s9 += s21 * 666643;
s10 += s21 * 470296; s10 += s21 * 470296;
s11 += s21 * 654183; s11 += s21 * 654183;
s12 -= s21 * 997805; s12 -= s21 * 997805;
s13 += s21 * 136657; s13 += s21 * 136657;
s14 -= s21 * 683901; s14 -= s21 * 683901;
s21 = 0;
s8 += s20 * 666643; s8 += s20 * 666643;
s9 += s20 * 470296; s9 += s20 * 470296;
s10 += s20 * 654183; s10 += s20 * 654183;
s11 -= s20 * 997805; s11 -= s20 * 997805;
s12 += s20 * 136657; s12 += s20 * 136657;
s13 -= s20 * 683901; s13 -= s20 * 683901;
s20 = 0;
s7 += s19 * 666643; s7 += s19 * 666643;
s8 += s19 * 470296; s8 += s19 * 470296;
s9 += s19 * 654183; s9 += s19 * 654183;
s10 -= s19 * 997805; s10 -= s19 * 997805;
s11 += s19 * 136657; s11 += s19 * 136657;
s12 -= s19 * 683901; s12 -= s19 * 683901;
s19 = 0;
s6 += s18 * 666643; s6 += s18 * 666643;
s7 += s18 * 470296; s7 += s18 * 470296;
s8 += s18 * 654183; s8 += s18 * 654183;
s9 -= s18 * 997805; s9 -= s18 * 997805;
s10 += s18 * 136657; s10 += s18 * 136657;
s11 -= s18 * 683901; s11 -= s18 * 683901;
s18 = 0;
carry6 = (s6 + (1 << 20)) >> 21; carry6 = (s6 + (1 << 20)) >> 21;
s7 += carry6; s7 += carry6;
s6 -= shl64(carry6, 21); s6 -= shl64(carry6, 21);
@ -156,35 +150,30 @@ void sc_reduce(unsigned char *s) {
s8 -= s17 * 997805; s8 -= s17 * 997805;
s9 += s17 * 136657; s9 += s17 * 136657;
s10 -= s17 * 683901; s10 -= s17 * 683901;
s17 = 0;
s4 += s16 * 666643; s4 += s16 * 666643;
s5 += s16 * 470296; s5 += s16 * 470296;
s6 += s16 * 654183; s6 += s16 * 654183;
s7 -= s16 * 997805; s7 -= s16 * 997805;
s8 += s16 * 136657; s8 += s16 * 136657;
s9 -= s16 * 683901; s9 -= s16 * 683901;
s16 = 0;
s3 += s15 * 666643; s3 += s15 * 666643;
s4 += s15 * 470296; s4 += s15 * 470296;
s5 += s15 * 654183; s5 += s15 * 654183;
s6 -= s15 * 997805; s6 -= s15 * 997805;
s7 += s15 * 136657; s7 += s15 * 136657;
s8 -= s15 * 683901; s8 -= s15 * 683901;
s15 = 0;
s2 += s14 * 666643; s2 += s14 * 666643;
s3 += s14 * 470296; s3 += s14 * 470296;
s4 += s14 * 654183; s4 += s14 * 654183;
s5 -= s14 * 997805; s5 -= s14 * 997805;
s6 += s14 * 136657; s6 += s14 * 136657;
s7 -= s14 * 683901; s7 -= s14 * 683901;
s14 = 0;
s1 += s13 * 666643; s1 += s13 * 666643;
s2 += s13 * 470296; s2 += s13 * 470296;
s3 += s13 * 654183; s3 += s13 * 654183;
s4 -= s13 * 997805; s4 -= s13 * 997805;
s5 += s13 * 136657; s5 += s13 * 136657;
s6 -= s13 * 683901; s6 -= s13 * 683901;
s13 = 0;
s0 += s12 * 666643; s0 += s12 * 666643;
s1 += s12 * 470296; s1 += s12 * 470296;
s2 += s12 * 654183; s2 += s12 * 654183;
@ -277,7 +266,6 @@ void sc_reduce(unsigned char *s) {
s3 -= s12 * 997805; s3 -= s12 * 997805;
s4 += s12 * 136657; s4 += s12 * 136657;
s5 -= s12 * 683901; s5 -= s12 * 683901;
s12 = 0;
carry0 = s0 >> 21; carry0 = s0 >> 21;
s1 += carry0; s1 += carry0;
s0 -= shl64(carry0, 21); s0 -= shl64(carry0, 21);
@ -543,42 +531,36 @@ void sc_muladd(unsigned char *s, const unsigned char *a, const unsigned char *b,
s14 -= s23 * 997805; s14 -= s23 * 997805;
s15 += s23 * 136657; s15 += s23 * 136657;
s16 -= s23 * 683901; s16 -= s23 * 683901;
s23 = 0;
s10 += s22 * 666643; s10 += s22 * 666643;
s11 += s22 * 470296; s11 += s22 * 470296;
s12 += s22 * 654183; s12 += s22 * 654183;
s13 -= s22 * 997805; s13 -= s22 * 997805;
s14 += s22 * 136657; s14 += s22 * 136657;
s15 -= s22 * 683901; s15 -= s22 * 683901;
s22 = 0;
s9 += s21 * 666643; s9 += s21 * 666643;
s10 += s21 * 470296; s10 += s21 * 470296;
s11 += s21 * 654183; s11 += s21 * 654183;
s12 -= s21 * 997805; s12 -= s21 * 997805;
s13 += s21 * 136657; s13 += s21 * 136657;
s14 -= s21 * 683901; s14 -= s21 * 683901;
s21 = 0;
s8 += s20 * 666643; s8 += s20 * 666643;
s9 += s20 * 470296; s9 += s20 * 470296;
s10 += s20 * 654183; s10 += s20 * 654183;
s11 -= s20 * 997805; s11 -= s20 * 997805;
s12 += s20 * 136657; s12 += s20 * 136657;
s13 -= s20 * 683901; s13 -= s20 * 683901;
s20 = 0;
s7 += s19 * 666643; s7 += s19 * 666643;
s8 += s19 * 470296; s8 += s19 * 470296;
s9 += s19 * 654183; s9 += s19 * 654183;
s10 -= s19 * 997805; s10 -= s19 * 997805;
s11 += s19 * 136657; s11 += s19 * 136657;
s12 -= s19 * 683901; s12 -= s19 * 683901;
s19 = 0;
s6 += s18 * 666643; s6 += s18 * 666643;
s7 += s18 * 470296; s7 += s18 * 470296;
s8 += s18 * 654183; s8 += s18 * 654183;
s9 -= s18 * 997805; s9 -= s18 * 997805;
s10 += s18 * 136657; s10 += s18 * 136657;
s11 -= s18 * 683901; s11 -= s18 * 683901;
s18 = 0;
carry6 = (s6 + (1 << 20)) >> 21; carry6 = (s6 + (1 << 20)) >> 21;
s7 += carry6; s7 += carry6;
s6 -= shl64(carry6, 21); s6 -= shl64(carry6, 21);
@ -618,35 +600,30 @@ void sc_muladd(unsigned char *s, const unsigned char *a, const unsigned char *b,
s8 -= s17 * 997805; s8 -= s17 * 997805;
s9 += s17 * 136657; s9 += s17 * 136657;
s10 -= s17 * 683901; s10 -= s17 * 683901;
s17 = 0;
s4 += s16 * 666643; s4 += s16 * 666643;
s5 += s16 * 470296; s5 += s16 * 470296;
s6 += s16 * 654183; s6 += s16 * 654183;
s7 -= s16 * 997805; s7 -= s16 * 997805;
s8 += s16 * 136657; s8 += s16 * 136657;
s9 -= s16 * 683901; s9 -= s16 * 683901;
s16 = 0;
s3 += s15 * 666643; s3 += s15 * 666643;
s4 += s15 * 470296; s4 += s15 * 470296;
s5 += s15 * 654183; s5 += s15 * 654183;
s6 -= s15 * 997805; s6 -= s15 * 997805;
s7 += s15 * 136657; s7 += s15 * 136657;
s8 -= s15 * 683901; s8 -= s15 * 683901;
s15 = 0;
s2 += s14 * 666643; s2 += s14 * 666643;
s3 += s14 * 470296; s3 += s14 * 470296;
s4 += s14 * 654183; s4 += s14 * 654183;
s5 -= s14 * 997805; s5 -= s14 * 997805;
s6 += s14 * 136657; s6 += s14 * 136657;
s7 -= s14 * 683901; s7 -= s14 * 683901;
s14 = 0;
s1 += s13 * 666643; s1 += s13 * 666643;
s2 += s13 * 470296; s2 += s13 * 470296;
s3 += s13 * 654183; s3 += s13 * 654183;
s4 -= s13 * 997805; s4 -= s13 * 997805;
s5 += s13 * 136657; s5 += s13 * 136657;
s6 -= s13 * 683901; s6 -= s13 * 683901;
s13 = 0;
s0 += s12 * 666643; s0 += s12 * 666643;
s1 += s12 * 470296; s1 += s12 * 470296;
s2 += s12 * 654183; s2 += s12 * 654183;
@ -739,7 +716,6 @@ void sc_muladd(unsigned char *s, const unsigned char *a, const unsigned char *b,
s3 -= s12 * 997805; s3 -= s12 * 997805;
s4 += s12 * 136657; s4 += s12 * 136657;
s5 -= s12 * 683901; s5 -= s12 * 683901;
s12 = 0;
carry0 = s0 >> 21; carry0 = s0 >> 21;
s1 += carry0; s1 += carry0;
s0 -= shl64(carry0, 21); s0 -= shl64(carry0, 21);