[llvm-bugs] [Bug 41312] New: [SLP] Missed icmp/fcmp allof/anyof reductions

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=41312

            Bug ID: 41312
           Summary: [SLP] Missed icmp/fcmp allof/anyof reductions
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: llvm-dev at redking.me.uk
                CC: a.bataev at hotmail.com, dtemirbulatov at gmail.com,
                    llvm-bugs at lists.llvm.org, spatel+llvm at rotateright.com

We should be able to combine these to allof/anyof vector reductions, instead we
end up with nested branch trees and scalar selects.

https://gcc.godbolt.org/z/FImIuY

#include <x86intrin.h>

float test_merge_allof_v4sf(__v4sf t) {
  if((t[0] < 0.0 && t[1] < 0.0 && t[2] < 0.0 && t[3] < 0.0) || 
     (t[0] > 1.0 && t[1] > 1.0 && t[2] > 1.0 && t[3] > 1.0))
    return 0;
  return t[0] + t[1];
}
float test_merge_anyof_v4sf(__v4sf t) {
  if((t[0] < 0.0 || t[1] < 0.0 || t[2] < 0.0 || t[3] < 0.0) || 
     (t[0] > 1.0 || t[1] > 1.0 || t[2] > 1.0 || t[3] > 1.0))
    return 0;
  return t[0] + t[1];
}

float test_separate_allof_v4sf(__v4sf t) {
  if((t[0] < 0.0 && t[1] < 0.0 && t[2] < 0.0 && t[3] < 0.0))
    return 0;
  if((t[0] > 1.0 && t[1] > 1.0 && t[2] > 1.0 && t[3] > 1.0))
    return 0;
  return t[0] + t[1];
}
float test_separate_anyof_v4sf(__v4sf t) {
  if((t[0] < 0.0 || t[1] < 0.0 || t[2] < 0.0 || t[3] < 0.0))
    return 0;
  if((t[0] > 1.0 || t[1] > 1.0 || t[2] > 1.0 || t[3] > 1.0))
    return 0;
  return t[0] + t[1];
}

int test_separate_allof_v4si(__v4si t) {
  if((t[0] < 1 && t[1] < 1 && t[2] < 1 && t[3] < 1))
    return 0;
  if((t[0] > 255 && t[1] > 255 && t[2] > 255 && t[3] > 255))
    return 0;
  return t[0] + t[1];
}
int test_separate_anyof_v4si(__v4si t) {
  if((t[0] < 1 || t[1] < 1 || t[2] < 1 || t[3] < 1))
    return 0;
  if((t[0] > 255 || t[1] > 255 || t[2] > 255 || t[3] > 255))
    return 0;
  return t[0] + t[1];
}

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