https://bugs.llvm.org/show_bug.cgi?id=45939
Bug ID: 45939
Summary: [LoopUnrollPeel] wrong-code with reduced test case
Product: libraries
Version: 10.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Loop Optimizer
Assignee: unassignedb...@nondot.org
Reporter: pauls...@linux.vnet.ibm.com
CC: llvm-bugs@lists.llvm.org
int a[256];
int b, c, d;
main() {
c = 0;
for (; c < 256; c++)
a[c] = c;
for (; d; d++)
;
printf("checksum = %X\n", b);
}
clang -O3 -march=z13 tc_peel2.i -o a.out -Wall; ./a.out
checksum = 0
clang -O3 -march=z13 tc_peel2.i -o a.out -Wall -mllvm -unroll-peel-count=2
checksum = 101
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