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1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc < %s -mtriple=i686-- -mattr=+sse4.1 | FileCheck %s3 4; Test that when we don't, we don't do the optimization5; -0 - (A - B) to (B - A) because A==B, -0 != 06 7define float @negfp(float %a, float %b) nounwind {8; CHECK-LABEL: negfp:9; CHECK: # %bb.0: # %entry10; CHECK-NEXT: pushl %eax11; CHECK-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero12; CHECK-NEXT: subss {{[0-9]+}}(%esp), %xmm013; CHECK-NEXT: xorps {{\.?LCPI[0-9]+_[0-9]+}}, %xmm014; CHECK-NEXT: movss %xmm0, (%esp)15; CHECK-NEXT: flds (%esp)16; CHECK-NEXT: popl %eax17; CHECK-NEXT: retl18entry:19 %sub = fsub float %a, %b ; <float> [#uses=1]20 %neg = fsub float -0.000000e+00, %sub ; <float> [#uses=1]21 ret float %neg22}23 24; This may infinite loop if isNegatibleForFree and getNegatedExpression are conflicted.25 26define double @negation_propagation(ptr %arg, double %arg1, double %arg2) nounwind {27; CHECK-LABEL: negation_propagation:28; CHECK: # %bb.0:29; CHECK-NEXT: pushl %ebp30; CHECK-NEXT: movl %esp, %ebp31; CHECK-NEXT: andl $-8, %esp32; CHECK-NEXT: subl $8, %esp33; CHECK-NEXT: movsd {{.*#+}} xmm0 = [1.0E+0,0.0E+0]34; CHECK-NEXT: divsd 12(%ebp), %xmm035; CHECK-NEXT: movsd {{.*#+}} xmm1 = mem[0],zero36; CHECK-NEXT: mulsd %xmm0, %xmm137; CHECK-NEXT: movapd %xmm0, %xmm238; CHECK-NEXT: mulsd %xmm0, %xmm239; CHECK-NEXT: mulsd %xmm0, %xmm240; CHECK-NEXT: subsd %xmm2, %xmm141; CHECK-NEXT: movsd %xmm1, (%esp)42; CHECK-NEXT: fldl (%esp)43; CHECK-NEXT: movl %ebp, %esp44; CHECK-NEXT: popl %ebp45; CHECK-NEXT: retl46 %t = fdiv double 1.0, %arg147 %t7 = fmul double %t, %arg248 %t10 = fneg double %t749 %t11 = fmul double %t, %t50 %t13 = fsub double %t11, %t51 %t14 = fneg double %t52 %t15 = fmul double %t, %t1453 %t16 = fmul double %t, %t1554 %t18 = fadd double %t16, %t755 ret double %t1856}57 58; This would crash because the negated expression for %sub459; creates a new use of %sub1 and that alters the negated cost60 61define float @fdiv_extra_use_changes_cost(float %a0, float %a1, float %a2) nounwind {62; CHECK-LABEL: fdiv_extra_use_changes_cost:63; CHECK: # %bb.0:64; CHECK-NEXT: pushl %eax65; CHECK-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero66; CHECK-NEXT: movss {{.*#+}} xmm1 = mem[0],zero,zero,zero67; CHECK-NEXT: subss {{[0-9]+}}(%esp), %xmm168; CHECK-NEXT: movaps %xmm1, %xmm269; CHECK-NEXT: mulss %xmm0, %xmm270; CHECK-NEXT: subss %xmm1, %xmm071; CHECK-NEXT: divss %xmm2, %xmm072; CHECK-NEXT: movss %xmm0, (%esp)73; CHECK-NEXT: flds (%esp)74; CHECK-NEXT: popl %eax75; CHECK-NEXT: retl76 %sub1 = fsub fast float %a0, %a177 %mul2 = fmul fast float %sub1, %a278 %neg = fneg fast float %a079 %add3 = fadd fast float %a1, %neg80 %sub4 = fadd fast float %add3, %a281 %div5 = fdiv fast float %sub4, %mul282 ret float %div583}84 85; PR55758 - this is not -(-X)86 87define <2 x i64> @fneg_mismatched_sizes(<4 x float> %x) {88; CHECK-LABEL: fneg_mismatched_sizes:89; CHECK: # %bb.0:90; CHECK-NEXT: xorps {{\.?LCPI[0-9]+_[0-9]+}}, %xmm091; CHECK-NEXT: xorps {{\.?LCPI[0-9]+_[0-9]+}}, %xmm092; CHECK-NEXT: retl93 %n = fneg <4 x float> %x94 %b = bitcast <4 x float> %n to <2 x i64>95 %r = xor <2 x i64> %b, <i64 -9223372036854775808, i64 -9223372036854775808>96 ret <2 x i64> %r97}98