mirror of
https://github.com/fluencelabs/wasmer
synced 2024-12-13 06:15:33 +00:00
122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/*
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* Copyright 2016 The Emscripten Authors. All rights reserved.
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* Emscripten is available under two separate licenses, the MIT license and the
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* University of Illinois/NCSA Open Source License. Both these licenses can be
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* found in the LICENSE file.
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*/
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#include <time.h>
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#include <stdio.h>
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#include <stdint.h>
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int64_t returner1() { return 0x0000def123450789ULL; }
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int64_t returner2(int test) {
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while (test > 10) test /= 2; // confuse the compiler so it doesn't eliminate this function
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return test > 5 ? 0x0000def123450123ULL : 0ULL;
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}
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void modifier1(int64_t t) {
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t |= 12;
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printf("m1: %lld\n", t);
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}
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void modifier2(int64_t &t) {
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t |= 12;
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}
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int truthy() {
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int x = time(0);
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while (x > 10) {
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x |= 7;
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x /= 2;
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}
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return x < 3;
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}
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struct IUB {
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int c;
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long long d;
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};
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IUB iub[] = {
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{ 55, 17179869201 },
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{ 122, 25769803837 },
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};
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int main(int argc, char **argv)
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{
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int64_t x1 = 0x1234def123450789ULL;
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int64_t x2 = 0x1234def123450788ULL;
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int64_t x3 = 0x1234def123450789ULL;
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printf("*%lld\n%d,%d,%d,%d,%d\n%d,%d,%d,%d,%d*\n", x1, x1==x2, x1<x2, x1<=x2, x1>x2, x1>=x2, // note: some rounding in the printing!
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x1==x3, x1<x3, x1<=x3, x1>x3, x1>=x3);
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printf("*%lld*\n", returner1());
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printf("*%lld*\n", returner2(30));
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uint64_t maxx = -1ULL;
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printf("*%llu*\n*%llu*\n", maxx, maxx >> 5);
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// Make sure params are not modified if they shouldn't be
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int64_t t = 123;
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modifier1(t);
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printf("*%lld*\n", t);
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modifier2(t);
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printf("*%lld*\n", t);
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// global structs with i64s
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printf("*%d,%lld*\n*%d,%lld*\n", iub[0].c, iub[0].d, iub[1].c, iub[1].d);
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// Bitshifts
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{
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int64_t a = -1;
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int64_t b = a >> 29;
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int64_t c = a >> 32;
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int64_t d = a >> 34;
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printf("*%lld,%lld,%lld,%lld*\n", a, b, c, d);
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uint64_t ua = -1;
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int64_t ub = ua >> 29;
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int64_t uc = ua >> 32;
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int64_t ud = ua >> 34;
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printf("*%lld,%lld,%lld,%lld*\n", ua, ub, uc, ud);
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}
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// Nonconstant bitshifts
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{
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int64_t a = -1;
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int64_t b = a >> (29 - argc + 1);
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int64_t c = a >> (32 - argc + 1);
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int64_t d = a >> (34 - argc + 1);
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printf("*%lld,%lld,%lld,%lld*\n", a, b, c, d);
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uint64_t ua = -1;
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int64_t ub = ua >> (29 - argc + 1);
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int64_t uc = ua >> (32 - argc + 1);
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int64_t ud = ua >> (34 - argc + 1);
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printf("*%lld,%lld,%lld,%lld*\n", ua, ub, uc, ud);
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}
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// Math mixtures with doubles
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{
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uint64_t a = 5;
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double b = 6.8;
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uint64_t c = a * b;
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if (truthy()) printf("*%d,%d,%d*\n", (int)&a, (int)&b, (int)&c); // printing addresses prevents optimizations
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printf("*prod:%llu*\n", c);
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}
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// Basic (rounded, for now) math. Just check compilation.
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int64_t a = 0x1234def123450789ULL;
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a--; if (truthy()) a--; // confuse optimizer
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int64_t b = 0x1234000000450789ULL;
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b++; if (truthy()) b--; // confuse optimizer
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printf("*%lld,%lld,%lld,%lld*\n", (a+b)/5000, (a-b)/5000, (a*3)/5000, (a/5)/5000);
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a -= 17; if (truthy()) a += 5; // confuse optimizer
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b -= 17; if (truthy()) b += 121; // confuse optimizer
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printf("*%llx,%llx,%llx,%llx*\n", b - a, b - a/2, b/2 - a, b - 20);
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if (truthy()) a += 5/b; // confuse optimizer
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if (truthy()) b += 121*(3+a/b); // confuse optimizer
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printf("*%llx,%llx,%llx,%llx*\n", a - b, a - b/2, a/2 - b, a - 20);
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return 0;
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}
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