https://bugs.llvm.org/show_bug.cgi?id=37341
Bug ID: 37341
Summary: Missed optimization: optimize unnecessary std::sort
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
clang trunk with -O3 for code below doesn't optimize std::sort (compiler must
remove it from output binary):
#include <algorithm>
#include <numeric>
void foo(int* a, int size)
{
std::sort(a, a + size);
}
int bar(int* a, int b)
{
foo(a, b);
return std::accumulate(a, a + b, 0);
}
GCC has similar behaviour. Is it possible to optimize it?
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