; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6 ; RUN: opt -S -passes=instcombine < %s | FileCheck %s define float @minimumnum_f32_1_minimumnum_val_p0(float %x) { ; CHECK-LABEL: define float @minimumnum_f32_1_minimumnum_val_p0( ; CHECK-SAME: float [[X:%.*]]) { ; CHECK-NEXT: [[Z:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float 0.000000e+00) ; CHECK-NEXT: ret float [[Z]] ; %y = call float @llvm.minimumnum.f32(float %x, float 0.0) %z = call float @llvm.minimumnum.f32(float %y, float 1.0) ret float %z } define float @minimumnum_f32_1_minimumnum_p0_val_fast(float %x) { ; CHECK-LABEL: define float @minimumnum_f32_1_minimumnum_p0_val_fast( ; CHECK-SAME: float [[X:%.*]]) { ; CHECK-NEXT: [[Z:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float 0.000000e+00) ; CHECK-NEXT: ret float [[Z]] ; %y = call float @llvm.minimumnum.f32(float 0.0, float %x) %z = call fast float @llvm.minimumnum.f32(float %y, float 1.0) ret float %z } define float @minimumnum_f32_1_minimumnum_p0_val_fmf1(float %x) { ; CHECK-LABEL: define float @minimumnum_f32_1_minimumnum_p0_val_fmf1( ; CHECK-SAME: float [[X:%.*]]) { ; CHECK-NEXT: [[Z:%.*]] = call nnan float @llvm.minimumnum.f32(float [[X]], float 0.000000e+00) ; CHECK-NEXT: ret float [[Z]] ; %y = call nsz nnan float @llvm.minimumnum.f32(float 0.0, float %x) %z = call nnan ninf float @llvm.minimumnum.f32(float %y, float 1.0) ret float %z } define float @minimumnum_f32_1_minimumnum_p0_val_fmf2(float %x) { ; CHECK-LABEL: define float @minimumnum_f32_1_minimumnum_p0_val_fmf2( ; CHECK-SAME: float [[X:%.*]]) { ; CHECK-NEXT: [[Z:%.*]] = call ninf float @llvm.minimumnum.f32(float [[X]], float 0.000000e+00) ; CHECK-NEXT: ret float [[Z]] ; %y = call nnan ninf float @llvm.minimumnum.f32(float 0.0, float %x) %z = call nsz ninf float @llvm.minimumnum.f32(float %y, float 1.0) ret float %z } define float @minimumnum_f32_1_minimumnum_p0_val_fmf3(float %x) { ; CHECK-LABEL: define float @minimumnum_f32_1_minimumnum_p0_val_fmf3( ; CHECK-SAME: float [[X:%.*]]) { ; CHECK-NEXT: [[Z:%.*]] = call nnan ninf nsz float @llvm.minimumnum.f32(float [[X]], float 0.000000e+00) ; CHECK-NEXT: ret float [[Z]] ; %y = call nsz ninf nnan float @llvm.minimumnum.f32(float 0.0, float %x) %z = call nsz ninf nnan float @llvm.minimumnum.f32(float %y, float 1.0) ret float %z } define float @minimumnum_f32_p0_minimumnum_val_n0(float %x) { ; CHECK-LABEL: define float @minimumnum_f32_p0_minimumnum_val_n0( ; CHECK-SAME: float [[X:%.*]]) { ; CHECK-NEXT: [[Z:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float -0.000000e+00) ; CHECK-NEXT: ret float [[Z]] ; %y = call float @llvm.minimumnum.f32(float %x, float -0.0) %z = call float @llvm.minimumnum.f32(float %y, float 0.0) ret float %z } define float @minimumnum_f32_1_minimumnum_p0_val(float %x) { ; CHECK-LABEL: define float @minimumnum_f32_1_minimumnum_p0_val( ; CHECK-SAME: float [[X:%.*]]) { ; CHECK-NEXT: [[Z:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float 0.000000e+00) ; CHECK-NEXT: ret float [[Z]] ; %y = call float @llvm.minimumnum.f32(float 0.0, float %x) %z = call float @llvm.minimumnum.f32(float %y, float 1.0) ret float %z } define <2 x float> @minimumnum_f32_1_minimumnum_val_p0_val_v2f32(<2 x float> %x) { ; CHECK-LABEL: define <2 x float> @minimumnum_f32_1_minimumnum_val_p0_val_v2f32( ; CHECK-SAME: <2 x float> [[X:%.*]]) { ; CHECK-NEXT: [[Z:%.*]] = call <2 x float> @llvm.minimumnum.v2f32(<2 x float> [[X]], <2 x float> zeroinitializer) ; CHECK-NEXT: ret <2 x float> [[Z]] ; %y = call <2 x float> @llvm.minimumnum.v2f32(<2 x float> %x, <2 x float> zeroinitializer) %z = call <2 x float> @llvm.minimumnum.v2f32(<2 x float> %y, <2 x float> splat (float 1.0)) ret <2 x float> %z } define float @minimumnum4(float %x, float %y, float %z, float %w) { ; CHECK-LABEL: define float @minimumnum4( ; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]], float [[Z:%.*]], float [[W:%.*]]) { ; CHECK-NEXT: [[A:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]]) ; CHECK-NEXT: [[B:%.*]] = call float @llvm.minimumnum.f32(float [[Z]], float [[W]]) ; CHECK-NEXT: [[C:%.*]] = call float @llvm.minimumnum.f32(float [[A]], float [[B]]) ; CHECK-NEXT: ret float [[C]] ; %a = call float @llvm.minimumnum.f32(float %x, float %y) %b = call float @llvm.minimumnum.f32(float %z, float %w) %c = call float @llvm.minimumnum.f32(float %a, float %b) ret float %c } define float @minimumnum_x_maximumnum_x_y(float %x, float %y) { ; CHECK-LABEL: define float @minimumnum_x_maximumnum_x_y( ; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) { ; CHECK-NEXT: [[A:%.*]] = call float @llvm.maximumnum.f32(float [[X]], float [[Y]]) ; CHECK-NEXT: [[B:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[A]]) ; CHECK-NEXT: ret float [[B]] ; %a = call float @llvm.maximumnum.f32(float %x, float %y) %b = call float @llvm.minimumnum.f32(float %x, float %a) ret float %b } define float @maximumnum_x_minimumnum_x_y(float %x, float %y) { ; CHECK-LABEL: define float @maximumnum_x_minimumnum_x_y( ; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) { ; CHECK-NEXT: [[A:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]]) ; CHECK-NEXT: [[B:%.*]] = call float @llvm.maximumnum.f32(float [[X]], float [[A]]) ; CHECK-NEXT: ret float [[B]] ; %a = call float @llvm.minimumnum.f32(float %x, float %y) %b = call float @llvm.maximumnum.f32(float %x, float %a) ret float %b } ; PR37405 - https://bugs.llvm.org/show_bug.cgi?id=37405 define double @minimumnum_neg_neg(double %x, double %y) { ; CHECK-LABEL: define double @minimumnum_neg_neg( ; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) { ; CHECK-NEXT: [[TMP1:%.*]] = call double @llvm.maximumnum.f64(double [[X]], double [[Y]]) ; CHECK-NEXT: [[R:%.*]] = fneg double [[TMP1]] ; CHECK-NEXT: ret double [[R]] ; %negx = fsub double -0.0, %x %negy = fsub double -0.0, %y %r = call double @llvm.minimumnum.f64(double %negx, double %negy) ret double %r } define double @minimumnum_unary_neg_neg(double %x, double %y) { ; CHECK-LABEL: define double @minimumnum_unary_neg_neg( ; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) { ; CHECK-NEXT: [[TMP1:%.*]] = call double @llvm.maximumnum.f64(double [[X]], double [[Y]]) ; CHECK-NEXT: [[R:%.*]] = fneg double [[TMP1]] ; CHECK-NEXT: ret double [[R]] ; %negx = fneg double %x %negy = fneg double %y %r = call double @llvm.minimumnum.f64(double %negx, double %negy) ret double %r } ; FMF is not required, but it should be propagated from the intrinsic (not the fnegs). ; Also, make sure this works with vectors. define <2 x double> @minimumnum_neg_neg_vec_fmf(<2 x double> %x, <2 x double> %y) { ; CHECK-LABEL: define <2 x double> @minimumnum_neg_neg_vec_fmf( ; CHECK-SAME: <2 x double> [[X:%.*]], <2 x double> [[Y:%.*]]) { ; CHECK-NEXT: [[TMP1:%.*]] = call nnan ninf <2 x double> @llvm.maximumnum.v2f64(<2 x double> [[X]], <2 x double> [[Y]]) ; CHECK-NEXT: [[R:%.*]] = fneg nnan ninf <2 x double> [[TMP1]] ; CHECK-NEXT: ret <2 x double> [[R]] ; %negx = fsub reassoc <2 x double> splat (double -0.0), %x %negy = fsub fast <2 x double> splat (double -0.0), %y %r = call nnan ninf <2 x double> @llvm.minimumnum.v2f64(<2 x double> %negx, <2 x double> %negy) ret <2 x double> %r } define <2 x double> @minimumnum_unary_neg_neg_vec_fmf(<2 x double> %x, <2 x double> %y) { ; CHECK-LABEL: define <2 x double> @minimumnum_unary_neg_neg_vec_fmf( ; CHECK-SAME: <2 x double> [[X:%.*]], <2 x double> [[Y:%.*]]) { ; CHECK-NEXT: [[TMP1:%.*]] = call nnan ninf <2 x double> @llvm.maximumnum.v2f64(<2 x double> [[X]], <2 x double> [[Y]]) ; CHECK-NEXT: [[R:%.*]] = fneg nnan ninf <2 x double> [[TMP1]] ; CHECK-NEXT: ret <2 x double> [[R]] ; %negx = fneg reassoc <2 x double> %x %negy = fneg fast <2 x double> %y %r = call nnan ninf <2 x double> @llvm.minimumnum.v2f64(<2 x double> %negx, <2 x double> %negy) ret <2 x double> %r } ; 1 extra use of an intermediate value should still allow the fold, ; but 2 would require more instructions than we started with. declare void @use(double) define double @minimumnum_neg_neg_extra_use_x(double %x, double %y) { ; CHECK-LABEL: define double @minimumnum_neg_neg_extra_use_x( ; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) { ; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]] ; CHECK-NEXT: [[TMP1:%.*]] = call double @llvm.maximumnum.f64(double [[X]], double [[Y]]) ; CHECK-NEXT: [[R:%.*]] = fneg double [[TMP1]] ; CHECK-NEXT: call void @use(double [[NEGX]]) ; CHECK-NEXT: ret double [[R]] ; %negx = fsub double -0.0, %x %negy = fsub double -0.0, %y %r = call double @llvm.minimumnum.f64(double %negx, double %negy) call void @use(double %negx) ret double %r } define double @minimumnum_unary_neg_neg_extra_use_x(double %x, double %y) { ; CHECK-LABEL: define double @minimumnum_unary_neg_neg_extra_use_x( ; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) { ; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]] ; CHECK-NEXT: [[TMP1:%.*]] = call double @llvm.maximumnum.f64(double [[X]], double [[Y]]) ; CHECK-NEXT: [[R:%.*]] = fneg double [[TMP1]] ; CHECK-NEXT: call void @use(double [[NEGX]]) ; CHECK-NEXT: ret double [[R]] ; %negx = fneg double %x %negy = fneg double %y %r = call double @llvm.minimumnum.f64(double %negx, double %negy) call void @use(double %negx) ret double %r } define double @minimumnum_neg_neg_extra_use_y(double %x, double %y) { ; CHECK-LABEL: define double @minimumnum_neg_neg_extra_use_y( ; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) { ; CHECK-NEXT: [[NEGY:%.*]] = fneg double [[Y]] ; CHECK-NEXT: [[TMP1:%.*]] = call double @llvm.maximumnum.f64(double [[X]], double [[Y]]) ; CHECK-NEXT: [[R:%.*]] = fneg double [[TMP1]] ; CHECK-NEXT: call void @use(double [[NEGY]]) ; CHECK-NEXT: ret double [[R]] ; %negx = fsub double -0.0, %x %negy = fsub double -0.0, %y %r = call double @llvm.minimumnum.f64(double %negx, double %negy) call void @use(double %negy) ret double %r } define double @minimumnum_unary_neg_neg_extra_use_y(double %x, double %y) { ; CHECK-LABEL: define double @minimumnum_unary_neg_neg_extra_use_y( ; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) { ; CHECK-NEXT: [[NEGY:%.*]] = fneg double [[Y]] ; CHECK-NEXT: [[TMP1:%.*]] = call double @llvm.maximumnum.f64(double [[X]], double [[Y]]) ; CHECK-NEXT: [[R:%.*]] = fneg double [[TMP1]] ; CHECK-NEXT: call void @use(double [[NEGY]]) ; CHECK-NEXT: ret double [[R]] ; %negx = fneg double %x %negy = fneg double %y %r = call double @llvm.minimumnum.f64(double %negx, double %negy) call void @use(double %negy) ret double %r } define double @minimumnum_neg_neg_extra_use_x_and_y(double %x, double %y) { ; CHECK-LABEL: define double @minimumnum_neg_neg_extra_use_x_and_y( ; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) { ; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]] ; CHECK-NEXT: [[NEGY:%.*]] = fneg double [[Y]] ; CHECK-NEXT: [[R:%.*]] = call double @llvm.minimumnum.f64(double [[NEGX]], double [[NEGY]]) ; CHECK-NEXT: call void @use(double [[NEGX]]) ; CHECK-NEXT: call void @use(double [[NEGY]]) ; CHECK-NEXT: ret double [[R]] ; %negx = fsub double -0.0, %x %negy = fsub double -0.0, %y %r = call double @llvm.minimumnum.f64(double %negx, double %negy) call void @use(double %negx) call void @use(double %negy) ret double %r } define double @minimumnum_unary_neg_neg_extra_use_x_and_y(double %x, double %y) { ; CHECK-LABEL: define double @minimumnum_unary_neg_neg_extra_use_x_and_y( ; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) { ; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]] ; CHECK-NEXT: [[NEGY:%.*]] = fneg double [[Y]] ; CHECK-NEXT: [[R:%.*]] = call double @llvm.minimumnum.f64(double [[NEGX]], double [[NEGY]]) ; CHECK-NEXT: call void @use(double [[NEGX]]) ; CHECK-NEXT: call void @use(double [[NEGY]]) ; CHECK-NEXT: ret double [[R]] ; %negx = fneg double %x %negy = fneg double %y %r = call double @llvm.minimumnum.f64(double %negx, double %negy) call void @use(double %negx) call void @use(double %negy) ret double %r } define float @minimumnum_reduce_precision(float %x, float %y) { ; CHECK-LABEL: define float @minimumnum_reduce_precision( ; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) { ; CHECK-NEXT: [[TRUNC:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]]) ; CHECK-NEXT: ret float [[TRUNC]] ; %x.ext = fpext float %x to double %y.ext = fpext float %y to double %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double %y.ext) %trunc = fptrunc double %minimumnum to float ret float %trunc } define float @minimumnum_reduce_precision_fmf(float %x, float %y) { ; CHECK-LABEL: define float @minimumnum_reduce_precision_fmf( ; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) { ; CHECK-NEXT: [[TRUNC:%.*]] = call nnan float @llvm.minimumnum.f32(float [[X]], float [[Y]]) ; CHECK-NEXT: ret float [[TRUNC]] ; %x.ext = fpext float %x to double %y.ext = fpext float %y to double %minimumnum = call nnan double @llvm.minimumnum.f64(double %x.ext, double %y.ext) %trunc = fptrunc double %minimumnum to float ret float %trunc } define float @minimumnum_reduce_precision_multi_use_0(float %x, float %y, ptr %p) { ; CHECK-LABEL: define float @minimumnum_reduce_precision_multi_use_0( ; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]], ptr [[P:%.*]]) { ; CHECK-NEXT: [[X_EXT:%.*]] = fpext float [[X]] to double ; CHECK-NEXT: store double [[X_EXT]], ptr [[P]], align 8 ; CHECK-NEXT: [[TRUNC:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]]) ; CHECK-NEXT: ret float [[TRUNC]] ; %x.ext = fpext float %x to double %y.ext = fpext float %y to double store double %x.ext, ptr %p %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double %y.ext) %trunc = fptrunc double %minimumnum to float ret float %trunc } define float @minimumnum_reduce_precision_multi_use_1(float %x, float %y, ptr %p) { ; CHECK-LABEL: define float @minimumnum_reduce_precision_multi_use_1( ; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]], ptr [[P:%.*]]) { ; CHECK-NEXT: [[Y_EXT:%.*]] = fpext float [[Y]] to double ; CHECK-NEXT: store double [[Y_EXT]], ptr [[P]], align 8 ; CHECK-NEXT: [[TRUNC:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]]) ; CHECK-NEXT: ret float [[TRUNC]] ; %x.ext = fpext float %x to double %y.ext = fpext float %y to double store double %y.ext, ptr %p %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double %y.ext) %trunc = fptrunc double %minimumnum to float ret float %trunc } define float @minimumnum_reduce_precision_multi_use_2(float %x, float %y, ptr %p, ptr %p2) { ; CHECK-LABEL: define float @minimumnum_reduce_precision_multi_use_2( ; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]], ptr [[P:%.*]], ptr [[P2:%.*]]) { ; CHECK-NEXT: [[X_EXT:%.*]] = fpext float [[X]] to double ; CHECK-NEXT: [[Y_EXT:%.*]] = fpext float [[Y]] to double ; CHECK-NEXT: store double [[X_EXT]], ptr [[P]], align 8 ; CHECK-NEXT: store double [[Y_EXT]], ptr [[P2]], align 8 ; CHECK-NEXT: [[MINIMUMNUM:%.*]] = call double @llvm.minimumnum.f64(double [[X_EXT]], double [[Y_EXT]]) ; CHECK-NEXT: [[TRUNC:%.*]] = fptrunc double [[MINIMUMNUM]] to float ; CHECK-NEXT: ret float [[TRUNC]] ; %x.ext = fpext float %x to double %y.ext = fpext float %y to double store double %x.ext, ptr %p store double %y.ext, ptr %p2 %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double %y.ext) %trunc = fptrunc double %minimumnum to float ret float %trunc } define float @minimumnum_reduce_precision_const(float %x) { ; CHECK-LABEL: define float @minimumnum_reduce_precision_const( ; CHECK-SAME: float [[X:%.*]]) { ; CHECK-NEXT: [[TRUNC:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float 1.000000e+00) ; CHECK-NEXT: ret float [[TRUNC]] ; %x.ext = fpext float %x to double %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double 1.0) %trunc = fptrunc double %minimumnum to float ret float %trunc } define float @minimumnum_reduce_precision_const_not_lossless(float %x) { ; CHECK-LABEL: define float @minimumnum_reduce_precision_const_not_lossless( ; CHECK-SAME: float [[X:%.*]]) { ; CHECK-NEXT: [[X_EXT:%.*]] = fpext float [[X]] to double ; CHECK-NEXT: [[MINIMUMNUM:%.*]] = call double @llvm.minimumnum.f64(double [[X_EXT]], double 1.000000e-01) ; CHECK-NEXT: [[TRUNC:%.*]] = fptrunc double [[MINIMUMNUM]] to float ; CHECK-NEXT: ret float [[TRUNC]] ; %x.ext = fpext float %x to double %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double 0.1) %trunc = fptrunc double %minimumnum to float ret float %trunc } define float @minimumnum_reduce_precision_const_multi_use(float %x) { ; CHECK-LABEL: define float @minimumnum_reduce_precision_const_multi_use( ; CHECK-SAME: float [[X:%.*]]) { ; CHECK-NEXT: [[X_EXT:%.*]] = fpext float [[X]] to double ; CHECK-NEXT: call void @use(double [[X_EXT]]) ; CHECK-NEXT: [[MINIMUMNUM:%.*]] = call double @llvm.minimumnum.f64(double [[X_EXT]], double 1.000000e+00) ; CHECK-NEXT: [[TRUNC:%.*]] = fptrunc double [[MINIMUMNUM]] to float ; CHECK-NEXT: ret float [[TRUNC]] ; %x.ext = fpext float %x to double call void @use(double %x.ext) %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double 1.0) %trunc = fptrunc double %minimumnum to float ret float %trunc } define float @minimumnum_negated_op(float %x) { ; CHECK-LABEL: define float @minimumnum_negated_op( ; CHECK-SAME: float [[X:%.*]]) { ; CHECK-NEXT: [[TMP1:%.*]] = call float @llvm.fabs.f32(float [[X]]) ; CHECK-NEXT: [[R:%.*]] = fneg float [[TMP1]] ; CHECK-NEXT: ret float [[R]] ; %negx = fneg float %x %r = call float @llvm.minimumnum.f32(float %x, float %negx) ret float %r } define <2 x double> @minimumnum_negated_op_fmf_commute_vec(<2 x double> %x) { ; CHECK-LABEL: define <2 x double> @minimumnum_negated_op_fmf_commute_vec( ; CHECK-SAME: <2 x double> [[X:%.*]]) { ; CHECK-NEXT: [[TMP1:%.*]] = call nnan ninf nsz <2 x double> @llvm.fabs.v2f64(<2 x double> [[X]]) ; CHECK-NEXT: [[R:%.*]] = fneg nnan ninf nsz <2 x double> [[TMP1]] ; CHECK-NEXT: ret <2 x double> [[R]] ; %negx = fneg <2 x double> %x %r = call nsz nnan ninf <2 x double> @llvm.minimumnum.v2f64(<2 x double> %negx, <2 x double> %x) ret <2 x double> %r } define double @minimumnum_negated_op_extra_use(double %x) { ; CHECK-LABEL: define double @minimumnum_negated_op_extra_use( ; CHECK-SAME: double [[X:%.*]]) { ; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]] ; CHECK-NEXT: call void @use(double [[NEGX]]) ; CHECK-NEXT: [[R:%.*]] = call double @llvm.minimumnum.f64(double [[NEGX]], double [[X]]) ; CHECK-NEXT: ret double [[R]] ; %negx = fneg double %x call void @use(double %negx) %r = call double @llvm.minimumnum.f64(double %negx, double %x) ret double %r }