File: optimization-remark-analysis.c

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (21 lines) | stat: -rw-r--r-- 691 bytes parent folder | download | duplicates (12) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
// RUN: %clang -O1 -fvectorize -target x86_64-unknown-unknown -emit-llvm -Rpass-analysis -S %s -o - 2>&1 | FileCheck %s --check-prefix=RPASS
// RUN: %clang -O1 -fvectorize -target x86_64-unknown-unknown -emit-llvm -S %s -o - 2>&1 | FileCheck %s

// RPASS: {{.*}}:12:5: remark: loop not vectorized: loop contains a switch statement
// CHECK-NOT: remark: loop not vectorized: loop contains a switch statement

double foo(int N, int *Array) {
  double v = 0.0;

  #pragma clang loop vectorize(enable)
  for (int i = 0; i < N; i++) {
    switch(Array[i]) {
    case 0: v += 1.0f; break;
    case 1: v -= 0.5f; break;
    case 2: v *= 2.0f; break;
    default: v = 0.0f;
    }
  }

  return v;
}