Closed as not planned
Closed as not planned
Description
| Bugzilla Link | 42444 |
| Version | trunk |
| OS | Linux |
| Attachments | .bc file of the source code |
Extended Description
$clang -v
clang version 9.0.0 (trunk 363125)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$clang -O3 -c -emit-llvm -femit-all-decls -mllvm -disable-llvm-optzns small.c
$opt -sroa -loop-idiom -jump-threading -lcssa -loop-reroll small.bc -o small-opt.bc
PHI nodes must have at least one entry. If the block is dead, the PHI should be removed!
%i.sroa.3.3.lcssa18 = phi i32****
in function c
LLVM ERROR: Broken function found, compilation aborted!without loop-reroll pass, opt works fine.
$opt -sroa -loop-idiom -jump-threading -lcssa small.bc -o small-opt.bc
long a;
int ***b;
void c() {
d:
for (;;) {
long e;
for (; 0;)
for (;;) {
unsigned *f;
unsigned **g = &f;
unsigned ***h = &g;
unsigned ****i[10][7] = {0, 0, &h};
int ****j[] = {&b, &b};
for (; a;)
goto d;
}
}
}