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 7define 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 22define float @still_not_fabs(float %x) #0 { 23; CHECK-LABEL: still_not_fabs: 24; CHECK: // %bb.0: 25; CHECK-NEXT: movi v1.2s, #128, lsl #24 26; CHECK-NEXT: fneg s2, s0 27; CHECK-NEXT: fcmp s0, s1 28; CHECK-NEXT: fcsel s0, s0, s2, ge 29; CHECK-NEXT: ret 30 %cmp = fcmp nnan oge float %x, -0.0 31 %sub = fsub nnan float -0.0, %x 32 %cond = select i1 %cmp, float %x, float %sub 33 ret float %cond 34} 35 36define float @nabsf(float %a) { 37; CHECK-LABEL: nabsf: 38; CHECK: // %bb.0: 39; CHECK-NEXT: fabs s0, s0 40; CHECK-NEXT: fneg s0, s0 41; CHECK-NEXT: ret 42 %conv = bitcast float %a to i32 43 %and = or i32 %conv, -2147483648 44 %conv1 = bitcast i32 %and to float 45 ret float %conv1 46} 47 48define double @nabsd(double %a) { 49; CHECK-LABEL: nabsd: 50; CHECK: // %bb.0: 51; CHECK-NEXT: fabs d0, d0 52; CHECK-NEXT: fneg d0, d0 53; CHECK-NEXT: ret 54 %conv = bitcast double %a to i64 55 %and = or i64 %conv, -9223372036854775808 56 %conv1 = bitcast i64 %and to double 57 ret double %conv1 58} 59 60define <4 x float> @nabsv4f32(<4 x float> %a) { 61; CHECK-LABEL: nabsv4f32: 62; CHECK: // %bb.0: 63; CHECK-NEXT: orr v0.4s, #128, lsl #24 64; CHECK-NEXT: ret 65 %conv = bitcast <4 x float> %a to <4 x i32> 66 %and = or <4 x i32> %conv, <i32 -2147483648, i32 -2147483648, i32 -2147483648, i32 -2147483648> 67 %conv1 = bitcast <4 x i32> %and to <4 x float> 68 ret <4 x float> %conv1 69} 70 71define <2 x double> @nabsv2d64(<2 x double> %a) { 72; CHECK-LABEL: nabsv2d64: 73; CHECK: // %bb.0: 74; CHECK-NEXT: movi v1.2d, #0000000000000000 75; CHECK-NEXT: fneg v1.2d, v1.2d 76; CHECK-NEXT: orr v0.16b, v0.16b, v1.16b 77; CHECK-NEXT: ret 78 %conv = bitcast <2 x double> %a to <2 x i64> 79 %and = or <2 x i64> %conv, <i64 -9223372036854775808, i64 -9223372036854775808> 80 %conv1 = bitcast <2 x i64> %and to <2 x double> 81 ret <2 x double> %conv1 82} 83 84attributes #0 = { "no-nans-fp-math"="true" } 85 86