scc

Simple C99 Compiler
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commit a993e8c13722106027d20e89369be1cc02753083
parent 5bb717efd8b6fab5fa7bc324dce6b0a8e4261f86
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Sat, 15 Aug 2015 11:03:12 +0200

Remove comparision in constant conditions

This was a very idea because it is easier to detect
a zero or an one than a comparision

Diffstat:
cc1/expr.c | 2+-
cc1/tests/test006.c | 10++++++----
2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/cc1/expr.c b/cc1/expr.c @@ -1161,7 +1161,7 @@ condition(void) expect('('); np = exp2cond(expr(), 0); if (np->constant) - np = node(ONE, inttype, np, constnode(zero)); + warn("conditional expression is constant"); expect(')'); return np; diff --git a/cc1/tests/test006.c b/cc1/tests/test006.c @@ -2,19 +2,22 @@ name: TEST006 description: Basic test for if output: +test006.c:42: warning: conditional expression is constant +test006.c:44: warning: conditional expression is constant +test006.c:47: warning: conditional expression is constant G1 M c F1 X2 F1 main G2 F1 main { - - j L2 #I0 #I0 =I + j L2 #I0 yI #I1 j L3 L2 - j L4 #I0 #I0 =I + j L4 #I0 j L5 L4 - j L6 #I1 #I0 =I + j L6 #I1 j L7 G1 MI #I0 =I yI #I1 j L8 @@ -52,4 +55,3 @@ main() } return 1; } -