1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2 ; RUN: llc < %s -mtriple=aarch64-unknown-unknown | FileCheck %s 3 4 ; Test against PR36600: https://bugs.llvm.org/show_bug.cgi?id=36600 5 ; This is not fabs. If X = -0.0, it should return -0.0 not 0.0. 6 7 define double @not_fabs(double %x) #0 { 8 ; CHECK-LABEL: not_fabs: 9 ; CHECK: // %bb.0: 10 ; CHECK-NEXT: fneg d1, d0 11 ; CHECK-NEXT: fcmp d0, #0.0 12 ; CHECK-NEXT: fcsel d0, d1, d0, le 13 ; CHECK-NEXT: ret 14 %cmp = fcmp nnan ole double %x, 0.0 15 %sub = fsub nnan double -0.0, %x 16 %cond = select i1 %cmp, double %sub, double %x 17 ret double %cond 18 } 19 20 ; Try again with different type, predicate, and compare constant. 21 22 define float @still_not_fabs(float %x) #0 { 23 ; CHECK-LABEL: still_not_fabs: 24 ; CHECK: // %bb.0: 25 ; CHECK-NEXT: adrp x8, .LCPI1_0 26 ; CHECK-NEXT: ldr s1, [x8, :lo12:.LCPI1_0] 27 ; CHECK-NEXT: fneg s2, s0 28 ; CHECK-NEXT: fcmp s0, s1 29 ; CHECK-NEXT: fcsel s0, s0, s2, ge 30 ; CHECK-NEXT: ret 31 %cmp = fcmp nnan oge float %x, -0.0 32 %sub = fsub nnan float -0.0, %x 33 %cond = select i1 %cmp, float %x, float %sub 34 ret float %cond 35 } 36 37 attributes #0 = { "no-nans-fp-math"="true" } 38 39
