https://bugs.llvm.org/show_bug.cgi?id=33856
Bug ID: 33856
Summary: clang ignores #pragma CX_LIMITED_RANGE
Product: clang
Version: 3.8
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: smcal...@gmail.com
CC: llvm-bugs@lists.llvm.org
At least on clang 3.8.0-2 (Ubuntu 16.04), this code:
//#pragma CX_LIMITED_RANGE on
#include <stdio.h>
#include <stdlib.h>
#include <complex.h>
int main() {
float complex a = rand() + I*rand();
float complex b = rand() + I*rand();
float complex c = a*b;
printf("res: %f,%f\n", __real__ c, __imag__ c);
}
generates identical assembly with and without the pragma on. I'm not sure the
implementation is _required_ to simplify complex arithmetic with it on, but I
think that's the spirit of the standard.
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