| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=aarch64-- | FileCheck %s |
| |
| ; https://bugs.llvm.org/show_bug.cgi?id=41668 |
| |
| define double @constant_fold_fdiv_by_zero(double* %p) { |
| ; CHECK-LABEL: constant_fold_fdiv_by_zero: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: mov x8, #9218868437227405312 |
| ; CHECK-NEXT: fmov d0, x8 |
| ; CHECK-NEXT: ret |
| %r = fdiv double 4.940660e-324, 0.0 |
| ret double %r |
| } |
| |
| ; frem by 0.0 --> NaN |
| |
| define double @constant_fold_frem_by_zero(double* %p) { |
| ; CHECK-LABEL: constant_fold_frem_by_zero: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: mov x8, #9221120237041090560 |
| ; CHECK-NEXT: fmov d0, x8 |
| ; CHECK-NEXT: ret |
| %r = frem double 4.940660e-324, 0.0 |
| ret double %r |
| } |
| |
| ; Inf * 0.0 --> NaN |
| |
| define double @constant_fold_fmul_nan(double* %p) { |
| ; CHECK-LABEL: constant_fold_fmul_nan: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: mov x8, #9221120237041090560 |
| ; CHECK-NEXT: fmov d0, x8 |
| ; CHECK-NEXT: ret |
| %r = fmul double 0x7ff0000000000000, 0.0 |
| ret double %r |
| } |
| |
| ; Inf + -Inf --> NaN |
| |
| define double @constant_fold_fadd_nan(double* %p) { |
| ; CHECK-LABEL: constant_fold_fadd_nan: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: mov x8, #9221120237041090560 |
| ; CHECK-NEXT: fmov d0, x8 |
| ; CHECK-NEXT: ret |
| %r = fadd double 0x7ff0000000000000, 0xfff0000000000000 |
| ret double %r |
| } |
| |
| ; Inf - Inf --> NaN |
| |
| define double @constant_fold_fsub_nan(double* %p) { |
| ; CHECK-LABEL: constant_fold_fsub_nan: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: mov x8, #9221120237041090560 |
| ; CHECK-NEXT: fmov d0, x8 |
| ; CHECK-NEXT: ret |
| %r = fsub double 0x7ff0000000000000, 0x7ff0000000000000 |
| ret double %r |
| } |
| |
| ; Inf * 0.0 + ? --> NaN |
| |
| define double @constant_fold_fma_nan(double* %p) { |
| ; CHECK-LABEL: constant_fold_fma_nan: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: mov x8, #9221120237041090560 |
| ; CHECK-NEXT: fmov d0, x8 |
| ; CHECK-NEXT: ret |
| %r = call double @llvm.fma.f64(double 0x7ff0000000000000, double 0.0, double 42.0) |
| ret double %r |
| } |
| |
| declare double @llvm.fma.f64(double, double, double) |