1; RUN: llc < %s | FileCheck %s --check-prefix=CHECK --check-prefix=SAFE 2; RUN: llc < %s -enable-unsafe-fp-math | FileCheck %s --check-prefix=CHECK --check-prefix=UNSAFE 3 4target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 5target triple = "x86_64--" 6 7; CHECK-LABEL: double_rounding: 8; SAFE: callq __trunctfdf2 9; SAFE-NEXT: cvtsd2ss %xmm0 10; UNSAFE: callq __trunctfsf2 11; UNSAFE-NOT: cvt 12define void @double_rounding(fp128* %x, float* %f) { 13entry: 14 %0 = load fp128, fp128* %x, align 16 15 %1 = fptrunc fp128 %0 to double 16 %2 = fptrunc double %1 to float 17 store float %2, float* %f, align 4 18 ret void 19} 20 21; CHECK-LABEL: double_rounding_precise_first: 22; CHECK: fstps (% 23; CHECK-NOT: fstpl 24define void @double_rounding_precise_first(float* %f) { 25entry: 26 ; Hack, to generate a precise FP_ROUND to double 27 %precise = call double asm sideeffect "fld %st(0)", "={st(0)}"() 28 %0 = fptrunc double %precise to float 29 store float %0, float* %f, align 4 30 ret void 31} 32