https://bugs.llvm.org/show_bug.cgi?id=41723
Bug ID: 41723
Summary: scalarizer makes function broken with "opt
-loop-rotate -slp-vectorizer -licm -early-cse-memssa
-sroa -jump-threading -scalarizer"
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: csz...@163.com
CC: llvm-bugs@lists.llvm.org
Created attachment 21887
--> https://bugs.llvm.org/attachment.cgi?id=21887&action=edit
.bc file of the source code
$clang -v
clang version 9.0.0 (trunk 355281)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/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/7.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.3.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$clang -O3 -c -emit-llvm -mllvm -disable-llvm-optzns small.c
$opt -loop-rotate -slp-vectorizer -licm -early-cse-memssa -sroa -jump-threading
-scalarizer small.bc -o small-opt.bc
PHI nodes not grouped at top of basic block!
%9 = phi i8 [ 6, %7 ], [ %9, %5 ]
label %8
in function c
LLVM ERROR: Broken function found, compilation aborted!
without scalarizer pass, opt works fine.
$opt -loop-rotate -slp-vectorizer -licm -early-cse-memssa -sroa -jump-threading
small.bc -o small-opt.bc
--------------------------------------------
int a, b;
int c() {
for (; 1;)
if (b) {
int d = 0;
a = 3;
for (; a > 8; ++a)
if (d) {
long int e[] = {0, 1, 1, 0, 1};
for (d = 6; 0;)
;
}
}
}
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