http://bugs.llvm.org/show_bug.cgi?id=32632
Bug ID: 32632
Summary: IndVarSimpify does not eliminate dead-loops with
variant induction variable.
Product: new-bugs
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: farhana.al...@gmail.com
CC: llvm-bugs@lists.llvm.org
IndVarSimplify does not handle dead-loops with variant induction variables.
It does not eliminate the comparison if the iv is loop-variant such as j in the
program below.
Here is the program of the
#define N 100
unsigned int b[N], a[N];
void foo() {
unsigned int i, j, k;
for (i = 84; i > 1; i--)
// dead-loop
for (j = i; j < i; j++)
for (k = 1; k < 7; k++)
a[i] = b[k];
}
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