Add minnum / maxnum intrinsics

These are named following the IEEE-754 names for these
functions, rather than the libm fmin / fmax to avoid
possible ambiguities. Some languages may implement something
resembling fmin / fmax which return NaN if either operand is
to propagate errors. These implement the IEEE-754 semantics
of returning the other operand if either is a NaN representing
missing data.

llvm-svn: 220341

4 files changed, 557 insertions, 0 deletions

diff --git a/llvm/test/Transforms/InstCombine/maxnum.ll b/llvm/test/Transforms/InstCombine/maxnum.ll
new file mode 100644
index 00000000000..585d9f41f9f
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/maxnum.ll
@@ -0,0 +1,222 @@
+; RUN: opt -S -instcombine < %s | FileCheck %s
+
+declare float @llvm.maxnum.f32(float, float) #0
+declare float @llvm.maxnum.v2f32(<2 x float>, <2 x float>) #0
+declare <4 x float> @llvm.maxnum.v4f32(<4 x float>, <4 x float>) #0
+
+declare double @llvm.maxnum.f64(double, double) #0
+declare <2 x double> @llvm.maxnum.v2f64(<2 x double>, <2 x double>) #0
+
+; CHECK-LABEL: @constant_fold_maxnum_f32
+; CHECK-NEXT: ret float 2.000000e+00
+define float @constant_fold_maxnum_f32() #0 {
+  %x = call float @llvm.maxnum.f32(float 1.0, float 2.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_maxnum_f32_inv
+; CHECK-NEXT: ret float 2.000000e+00
+define float @constant_fold_maxnum_f32_inv() #0 {
+  %x = call float @llvm.maxnum.f32(float 2.0, float 1.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_maxnum_f32_nan0
+; CHECK-NEXT: ret float 2.000000e+00
+define float @constant_fold_maxnum_f32_nan0() #0 {
+  %x = call float @llvm.maxnum.f32(float 0x7FF8000000000000, float 2.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_maxnum_f32_nan1
+; CHECK-NEXT: ret float 2.000000e+00
+define float @constant_fold_maxnum_f32_nan1() #0 {
+  %x = call float @llvm.maxnum.f32(float 2.0, float 0x7FF8000000000000) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_maxnum_f32_nan_nan
+; CHECK-NEXT: ret float 0x7FF8000000000000
+define float @constant_fold_maxnum_f32_nan_nan() #0 {
+  %x = call float @llvm.maxnum.f32(float 0x7FF8000000000000, float 0x7FF8000000000000) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_maxnum_f32_p0_p0
+; CHECK-NEXT: ret float 0.000000e+00
+define float @constant_fold_maxnum_f32_p0_p0() #0 {
+  %x = call float @llvm.maxnum.f32(float 0.0, float 0.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_maxnum_f32_p0_n0
+; CHECK-NEXT: ret float 0.000000e+00
+define float @constant_fold_maxnum_f32_p0_n0() #0 {
+  %x = call float @llvm.maxnum.f32(float 0.0, float -0.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_maxnum_f32_n0_p0
+; CHECK-NEXT: ret float -0.000000e+00
+define float @constant_fold_maxnum_f32_n0_p0() #0 {
+  %x = call float @llvm.maxnum.f32(float -0.0, float 0.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_maxnum_f32_n0_n0
+; CHECK-NEXT: ret float -0.000000e+00
+define float @constant_fold_maxnum_f32_n0_n0() #0 {
+  %x = call float @llvm.maxnum.f32(float -0.0, float -0.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_maxnum_v4f32
+; CHECK-NEXT: ret <4 x float> <float 2.000000e+00, float 8.000000e+00, float 1.000000e+01, float 9.000000e+00>
+define <4 x float> @constant_fold_maxnum_v4f32() #0 {
+  %x = call <4 x float> @llvm.maxnum.v4f32(<4 x float> <float 1.0, float 8.0, float 3.0, float 9.0>, <4 x float> <float 2.0, float 2.0, float 10.0, float 5.0>)
+  ret <4 x float> %x
+}
+
+; CHECK-LABEL: @constant_fold_maxnum_f64
+; CHECK-NEXT: ret double 2.000000e+00
+define double @constant_fold_maxnum_f64() #0 {
+  %x = call double @llvm.maxnum.f64(double 1.0, double 2.0) #0
+  ret double %x
+}
+
+; CHECK-LABEL: @constant_fold_maxnum_f64_nan0
+; CHECK-NEXT: ret double 2.000000e+00
+define double @constant_fold_maxnum_f64_nan0() #0 {
+  %x = call double @llvm.maxnum.f64(double 0x7FF8000000000000, double 2.0) #0
+  ret double %x
+}
+
+; CHECK-LABEL: @constant_fold_maxnum_f64_nan1
+; CHECK-NEXT: ret double 2.000000e+00
+define double @constant_fold_maxnum_f64_nan1() #0 {
+  %x = call double @llvm.maxnum.f64(double 2.0, double 0x7FF8000000000000) #0
+  ret double %x
+}
+
+; CHECK-LABEL: @constant_fold_maxnum_f64_nan_nan
+; CHECK-NEXT: ret double 0x7FF8000000000000
+define double @constant_fold_maxnum_f64_nan_nan() #0 {
+  %x = call double @llvm.maxnum.f64(double 0x7FF8000000000000, double 0x7FF8000000000000) #0
+  ret double %x
+}
+
+; CHECK-LABEL: @canonicalize_constant_maxnum_f32
+; CHECK: call float @llvm.maxnum.f32(float %x, float 1.000000e+00)
+define float @canonicalize_constant_maxnum_f32(float %x) #0 {
+  %y = call float @llvm.maxnum.f32(float 1.0, float %x) #0
+  ret float %y
+}
+
+; CHECK-LABEL: @noop_maxnum_f32
+; CHECK-NEXT: ret float %x
+define float @noop_maxnum_f32(float %x) #0 {
+  %y = call float @llvm.maxnum.f32(float %x, float %x) #0
+  ret float %y
+}
+
+; CHECK-LABEL: @maxnum_f32_nan_val
+; CHECK-NEXT: ret float %x
+define float @maxnum_f32_nan_val(float %x) #0 {
+  %y = call float @llvm.maxnum.f32(float 0x7FF8000000000000, float %x) #0
+  ret float %y
+}
+
+; CHECK-LABEL: @maxnum_f32_val_nan
+; CHECK-NEXT: ret float %x
+define float @maxnum_f32_val_nan(float %x) #0 {
+  %y = call float @llvm.maxnum.f32(float %x, float 0x7FF8000000000000) #0
+  ret float %y
+}
+
+; CHECK-LABEL: @fold_maxnum_f32_undef_undef
+; CHECK-NEXT: ret float undef
+define float @fold_maxnum_f32_undef_undef(float %x) nounwind {
+  %val = call float @llvm.maxnum.f32(float undef, float undef) #0
+  ret float %val
+}
+
+; CHECK-LABEL: @fold_maxnum_f32_val_undef
+; CHECK-NEXT: ret float %x
+define float @fold_maxnum_f32_val_undef(float %x) nounwind {
+  %val = call float @llvm.maxnum.f32(float %x, float undef) #0
+  ret float %val
+}
+
+; CHECK-LABEL: @fold_maxnum_f32_undef_val
+; CHECK-NEXT: ret float %x
+define float @fold_maxnum_f32_undef_val(float %x) nounwind {
+  %val = call float @llvm.maxnum.f32(float undef, float %x) #0
+  ret float %val
+}
+
+; CHECK-LABEL: @maxnum_x_maxnum_x_y
+; CHECK-NEXT: call float @llvm.maxnum.f32(float %x, float %y)
+; CHECK-NEXT: ret float
+define float @maxnum_x_maxnum_x_y(float %x, float %y) #0 {
+  %a = call float @llvm.maxnum.f32(float %x, float %y) #0
+  %b = call float @llvm.maxnum.f32(float %x, float %a) #0
+  ret float %b
+}
+
+; CHECK-LABEL: @maxnum_y_maxnum_x_y
+; CHECK-NEXT: call float @llvm.maxnum.f32(float %x, float %y)
+; CHECK-NEXT: ret float
+define float @maxnum_y_maxnum_x_y(float %x, float %y) #0 {
+  %a = call float @llvm.maxnum.f32(float %x, float %y) #0
+  %b = call float @llvm.maxnum.f32(float %y, float %a) #0
+  ret float %b
+}
+
+; CHECK-LABEL: @maxnum_z_maxnum_x_y
+; CHECK-NEXT: call float @llvm.maxnum.f32(float %x, float %y)
+; CHECK-NEXT: call float @llvm.maxnum.f32(float %z, float %a)
+; CHECK-NEXT: ret float
+define float @maxnum_z_maxnum_x_y(float %x, float %y, float %z) #0 {
+  %a = call float @llvm.maxnum.f32(float %x, float %y) #0
+  %b = call float @llvm.maxnum.f32(float %z, float %a) #0
+  ret float %b
+}
+
+; CHECK-LABEL: @maxnum_maxnum_x_y_z
+; CHECK-NEXT: call float @llvm.maxnum.f32(float %x, float %y)
+; CHECK-NEXT: call float @llvm.maxnum.f32(float %a, float %z)
+; CHECK-NEXT: ret float
+define float @maxnum_maxnum_x_y_z(float %x, float %y, float %z) #0 {
+  %a = call float @llvm.maxnum.f32(float %x, float %y) #0
+  %b = call float @llvm.maxnum.f32(float %a, float %z) #0
+  ret float %b
+}
+
+; CHECK-LABEL: @maxnum4
+; CHECK-NEXT: call float @llvm.maxnum.f32(float %x, float %y)
+; CHECK-NEXT: call float @llvm.maxnum.f32(float %z, float %w)
+; CHECK-NEXT: call float @llvm.maxnum.f32(float %a, float %b)
+; CHECK-NEXT: ret float
+define float @maxnum4(float %x, float %y, float %z, float %w) #0 {
+  %a = call float @llvm.maxnum.f32(float %x, float %y) #0
+  %b = call float @llvm.maxnum.f32(float %z, float %w) #0
+  %c = call float @llvm.maxnum.f32(float %a, float %b) #0
+  ret float %c
+}
+
+; CHECK-LABEL: @fold_maxnum_f32_inf_val
+; CHECK-NEXT: ret float 0x7FF0000000000000
+define float @fold_maxnum_f32_inf_val(float %x) nounwind {
+  %val = call float @llvm.maxnum.f32(float 0x7FF0000000000000, float %x) #0
+  ret float %val
+}
+
+; CHECK-LABEL: @fold_maxnum_f32_neginf_val
+; CHECK-NEXT: call float @llvm.maxnum.f32(float %x, float 0xFFF0000000000000)
+; CHECK-NEXT: ret float
+define float @fold_maxnum_f32_neginf_val(float %x) nounwind {
+  %val = call float @llvm.maxnum.f32(float 0xFFF0000000000000, float %x) #0
+  ret float %val
+}
+
+attributes #0 = { nounwind readnone }
diff --git a/llvm/test/Transforms/InstCombine/minnum.ll b/llvm/test/Transforms/InstCombine/minnum.ll
new file mode 100644
index 00000000000..57d6e165a14
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/minnum.ll
@@ -0,0 +1,244 @@
+; RUN: opt -S -instcombine < %s | FileCheck %s
+
+declare float @llvm.minnum.f32(float, float) #0
+declare float @llvm.minnum.v2f32(<2 x float>, <2 x float>) #0
+declare <4 x float> @llvm.minnum.v4f32(<4 x float>, <4 x float>) #0
+
+declare double @llvm.minnum.f64(double, double) #0
+declare <2 x double> @llvm.minnum.v2f64(<2 x double>, <2 x double>) #0
+
+declare float @llvm.fmax.f32(float, float) #0
+
+; CHECK-LABEL: @constant_fold_minnum_f32
+; CHECK-NEXT: ret float 1.000000e+00
+define float @constant_fold_minnum_f32() #0 {
+  %x = call float @llvm.minnum.f32(float 1.0, float 2.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_minnum_f32_inv
+; CHECK-NEXT: ret float 1.000000e+00
+define float @constant_fold_minnum_f32_inv() #0 {
+  %x = call float @llvm.minnum.f32(float 2.0, float 1.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_minnum_f32_nan0
+; CHECK-NEXT: ret float 2.000000e+00
+define float @constant_fold_minnum_f32_nan0() #0 {
+  %x = call float @llvm.minnum.f32(float 0x7FF8000000000000, float 2.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_minnum_f32_nan1
+; CHECK-NEXT: ret float 2.000000e+00
+define float @constant_fold_minnum_f32_nan1() #0 {
+  %x = call float @llvm.minnum.f32(float 2.0, float 0x7FF8000000000000) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_minnum_f32_nan_nan
+; CHECK-NEXT: ret float 0x7FF8000000000000
+define float @constant_fold_minnum_f32_nan_nan() #0 {
+  %x = call float @llvm.minnum.f32(float 0x7FF8000000000000, float 0x7FF8000000000000) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_minnum_f32_p0_p0
+; CHECK-NEXT: ret float 0.000000e+00
+define float @constant_fold_minnum_f32_p0_p0() #0 {
+  %x = call float @llvm.minnum.f32(float 0.0, float 0.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_minnum_f32_p0_n0
+; CHECK-NEXT: ret float 0.000000e+00
+define float @constant_fold_minnum_f32_p0_n0() #0 {
+  %x = call float @llvm.minnum.f32(float 0.0, float -0.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_minnum_f32_n0_p0
+; CHECK-NEXT: ret float -0.000000e+00
+define float @constant_fold_minnum_f32_n0_p0() #0 {
+  %x = call float @llvm.minnum.f32(float -0.0, float 0.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_minnum_f32_n0_n0
+; CHECK-NEXT: ret float -0.000000e+00
+define float @constant_fold_minnum_f32_n0_n0() #0 {
+  %x = call float @llvm.minnum.f32(float -0.0, float -0.0) #0
+  ret float %x
+}
+
+; CHECK-LABEL: @constant_fold_minnum_v4f32
+; CHECK-NEXT: ret <4 x float> <float 1.000000e+00, float 2.000000e+00, float 3.000000e+00, float 5.000000e+00>
+define <4 x float> @constant_fold_minnum_v4f32() #0 {
+  %x = call <4 x float> @llvm.minnum.v4f32(<4 x float> <float 1.0, float 8.0, float 3.0, float 9.0>, <4 x float> <float 2.0, float 2.0, float 10.0, float 5.0>)
+  ret <4 x float> %x
+}
+
+; CHECK-LABEL: @constant_fold_minnum_f64
+; CHECK-NEXT: ret double 1.000000e+00
+define double @constant_fold_minnum_f64() #0 {
+  %x = call double @llvm.minnum.f64(double 1.0, double 2.0) #0
+  ret double %x
+}
+
+; CHECK-LABEL: @constant_fold_minnum_f64_nan0
+; CHECK-NEXT: ret double 2.000000e+00
+define double @constant_fold_minnum_f64_nan0() #0 {
+  %x = call double @llvm.minnum.f64(double 0x7FF8000000000000, double 2.0) #0
+  ret double %x
+}
+
+; CHECK-LABEL: @constant_fold_minnum_f64_nan1
+; CHECK-NEXT: ret double 2.000000e+00
+define double @constant_fold_minnum_f64_nan1() #0 {
+  %x = call double @llvm.minnum.f64(double 2.0, double 0x7FF8000000000000) #0
+  ret double %x
+}
+
+; CHECK-LABEL: @constant_fold_minnum_f64_nan_nan
+; CHECK-NEXT: ret double 0x7FF8000000000000
+define double @constant_fold_minnum_f64_nan_nan() #0 {
+  %x = call double @llvm.minnum.f64(double 0x7FF8000000000000, double 0x7FF8000000000000) #0
+  ret double %x
+}
+
+; CHECK-LABEL: @canonicalize_constant_minnum_f32
+; CHECK: call float @llvm.minnum.f32(float %x, float 1.000000e+00)
+define float @canonicalize_constant_minnum_f32(float %x) #0 {
+  %y = call float @llvm.minnum.f32(float 1.0, float %x) #0
+  ret float %y
+}
+
+; CHECK-LABEL: @noop_minnum_f32
+; CHECK-NEXT: ret float %x
+define float @noop_minnum_f32(float %x) #0 {
+  %y = call float @llvm.minnum.f32(float %x, float %x) #0
+  ret float %y
+}
+
+; CHECK-LABEL: @minnum_f32_nan_val
+; CHECK-NEXT: ret float %x
+define float @minnum_f32_nan_val(float %x) #0 {
+  %y = call float @llvm.minnum.f32(float 0x7FF8000000000000, float %x) #0
+  ret float %y
+}
+
+; CHECK-LABEL: @minnum_f32_val_nan
+; CHECK-NEXT: ret float %x
+define float @minnum_f32_val_nan(float %x) #0 {
+  %y = call float @llvm.minnum.f32(float %x, float 0x7FF8000000000000) #0
+  ret float %y
+}
+
+; CHECK-LABEL: @fold_minnum_f32_undef_undef
+; CHECK-NEXT: ret float undef
+define float @fold_minnum_f32_undef_undef(float %x) nounwind {
+  %val = call float @llvm.minnum.f32(float undef, float undef) #0
+  ret float %val
+}
+
+; CHECK-LABEL: @fold_minnum_f32_val_undef
+; CHECK-NEXT: ret float %x
+define float @fold_minnum_f32_val_undef(float %x) nounwind {
+  %val = call float @llvm.minnum.f32(float %x, float undef) #0
+  ret float %val
+}
+
+; CHECK-LABEL: @fold_minnum_f32_undef_val
+; CHECK-NEXT: ret float %x
+define float @fold_minnum_f32_undef_val(float %x) nounwind {
+  %val = call float @llvm.minnum.f32(float undef, float %x) #0
+  ret float %val
+}
+
+; CHECK-LABEL: @minnum_x_minnum_x_y
+; CHECK-NEXT: call float @llvm.minnum.f32(float %x, float %y)
+; CHECK-NEXT: ret float
+define float @minnum_x_minnum_x_y(float %x, float %y) #0 {
+  %a = call float @llvm.minnum.f32(float %x, float %y) #0
+  %b = call float @llvm.minnum.f32(float %x, float %a) #0
+  ret float %b
+}
+
+; CHECK-LABEL: @minnum_y_minnum_x_y
+; CHECK-NEXT: call float @llvm.minnum.f32(float %x, float %y)
+; CHECK-NEXT: ret float
+define float @minnum_y_minnum_x_y(float %x, float %y) #0 {
+  %a = call float @llvm.minnum.f32(float %x, float %y) #0
+  %b = call float @llvm.minnum.f32(float %y, float %a) #0
+  ret float %b
+}
+
+; CHECK-LABEL: @minnum_z_minnum_x_y
+; CHECK-NEXT: call float @llvm.minnum.f32(float %x, float %y)
+; CHECK-NEXT: call float @llvm.minnum.f32(float %z, float %a)
+; CHECK-NEXT: ret float
+define float @minnum_z_minnum_x_y(float %x, float %y, float %z) #0 {
+  %a = call float @llvm.minnum.f32(float %x, float %y) #0
+  %b = call float @llvm.minnum.f32(float %z, float %a) #0
+  ret float %b
+}
+
+; CHECK-LABEL: @minnum_minnum_x_y_z
+; CHECK-NEXT: call float @llvm.minnum.f32(float %x, float %y)
+; CHECK-NEXT: call float @llvm.minnum.f32(float %a, float %z)
+; CHECK-NEXT: ret float
+define float @minnum_minnum_x_y_z(float %x, float %y, float %z) #0 {
+  %a = call float @llvm.minnum.f32(float %x, float %y) #0
+  %b = call float @llvm.minnum.f32(float %a, float %z) #0
+  ret float %b
+}
+
+; CHECK-LABEL: @minnum4
+; CHECK-NEXT: call float @llvm.minnum.f32(float %x, float %y)
+; CHECK-NEXT: call float @llvm.minnum.f32(float %z, float %w)
+; CHECK-NEXT: call float @llvm.minnum.f32(float %a, float %b)
+; CHECK-NEXT: ret float
+define float @minnum4(float %x, float %y, float %z, float %w) #0 {
+  %a = call float @llvm.minnum.f32(float %x, float %y) #0
+  %b = call float @llvm.minnum.f32(float %z, float %w) #0
+  %c = call float @llvm.minnum.f32(float %a, float %b) #0
+  ret float %c
+}
+
+; CHECK-LABEL: @minnum_x_fmax_x_y
+; CHECK-NEXT: call float @llvm.fmax.f32
+; CHECK-NEXT: call float @llvm.minnum.f32
+; CHECK-NEXT: ret float
+define float @minnum_x_fmax_x_y(float %x, float %y) #0 {
+  %a = call float @llvm.fmax.f32(float %x, float %y) #0
+  %b = call float @llvm.minnum.f32(float %x, float %a) #0
+  ret float %b
+}
+
+; CHECK-LABEL: @fmax_x_minnum_x_y
+; CHECK-NEXT: call float @llvm.minnum.f32
+; CHECK-NEXT: call float @llvm.fmax.f32
+; CHECK-NEXT: ret float
+define float @fmax_x_minnum_x_y(float %x, float %y) #0 {
+  %a = call float @llvm.minnum.f32(float %x, float %y) #0
+  %b = call float @llvm.fmax.f32(float %x, float %a) #0
+  ret float %b
+}
+
+; CHECK-LABEL: @fold_minnum_f32_inf_val
+; CHECK-NEXT: call float @llvm.minnum.f32(float %x, float 0x7FF0000000000000)
+; CHECK-NEXT: ret float
+define float @fold_minnum_f32_inf_val(float %x) nounwind {
+  %val = call float @llvm.minnum.f32(float 0x7FF0000000000000, float %x) #0
+  ret float %val
+}
+
+; CHECK-LABEL: @fold_minnum_f32_minf_val
+; CHECK-NEXT: ret float 0xFFF0000000000000
+define float @fold_minnum_f32_minf_val(float %x) nounwind {
+  %val = call float @llvm.minnum.f32(float 0xFFF0000000000000, float %x) #0
+  ret float %val
+}
+
+attributes #0 = { nounwind readnone }
diff --git a/llvm/test/Transforms/LoopVectorize/intrinsic.ll b/llvm/test/Transforms/LoopVectorize/intrinsic.ll
index 80149d23a46..d48731a0743 100644
--- a/llvm/test/Transforms/LoopVectorize/intrinsic.ll
+++ b/llvm/test/Transforms/LoopVectorize/intrinsic.ll
@@ -1192,3 +1192,59 @@ for.body:                                         ; preds = %entry, %for.body
 for.end:                                          ; preds = %for.body, %entry
   ret void
 }
+
+declare float @llvm.minnum.f32(float, float) nounwind readnone
+
+;CHECK-LABEL: @minnum_f32(
+;CHECK: llvm.minnum.v4f32
+;CHECK: ret void
+define void @minnum_f32(i32 %n, float* noalias %y, float* noalias %x, float* noalias %z) nounwind uwtable {
+entry:
+  %cmp9 = icmp sgt i32 %n, 0
+  br i1 %cmp9, label %for.body, label %for.end
+
+for.body:                                         ; preds = %entry, %for.body
+  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
+  %arrayidx = getelementptr inbounds float* %y, i64 %indvars.iv
+  %0 = load float* %arrayidx, align 4
+  %arrayidx2 = getelementptr inbounds float* %z, i64 %indvars.iv
+  %1 = load float* %arrayidx2, align 4
+  %call = tail call float @llvm.minnum.f32(float %0, float %1) nounwind readnone
+  %arrayidx4 = getelementptr inbounds float* %x, i64 %indvars.iv
+  store float %call, float* %arrayidx4, align 4
+  %indvars.iv.next = add i64 %indvars.iv, 1
+  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
+  %exitcond = icmp eq i32 %lftr.wideiv, %n
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:                                          ; preds = %for.body, %entry
+  ret void
+}
+
+declare float @llvm.maxnum.f32(float, float) nounwind readnone
+
+;CHECK-LABEL: @maxnum_f32(
+;CHECK: llvm.maxnum.v4f32
+;CHECK: ret void
+define void @maxnum_f32(i32 %n, float* noalias %y, float* noalias %x, float* noalias %z) nounwind uwtable {
+entry:
+  %cmp9 = icmp sgt i32 %n, 0
+  br i1 %cmp9, label %for.body, label %for.end
+
+for.body:                                         ; preds = %entry, %for.body
+  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
+  %arrayidx = getelementptr inbounds float* %y, i64 %indvars.iv
+  %0 = load float* %arrayidx, align 4
+  %arrayidx2 = getelementptr inbounds float* %z, i64 %indvars.iv
+  %1 = load float* %arrayidx2, align 4
+  %call = tail call float @llvm.maxnum.f32(float %0, float %1) nounwind readnone
+  %arrayidx4 = getelementptr inbounds float* %x, i64 %indvars.iv
+  store float %call, float* %arrayidx4, align 4
+  %indvars.iv.next = add i64 %indvars.iv, 1
+  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
+  %exitcond = icmp eq i32 %lftr.wideiv, %n
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:                                          ; preds = %for.body, %entry
+  ret void
+}
diff --git a/llvm/test/Transforms/SimplifyCFG/speculate-math.ll b/llvm/test/Transforms/SimplifyCFG/speculate-math.ll
index 29583b6d6a0..0ba93d29117 100644
--- a/llvm/test/Transforms/SimplifyCFG/speculate-math.ll
+++ b/llvm/test/Transforms/SimplifyCFG/speculate-math.ll
@@ -4,6 +4,8 @@ declare float @llvm.sqrt.f32(float) nounwind readonly
 declare float @llvm.fma.f32(float, float, float) nounwind readonly
 declare float @llvm.fmuladd.f32(float, float, float) nounwind readonly
 declare float @llvm.fabs.f32(float) nounwind readonly
+declare float @llvm.minnum.f32(float, float) nounwind readonly
+declare float @llvm.maxnum.f32(float, float) nounwind readonly
 
 ; CHECK-LABEL: @sqrt_test(
 ; CHECK: select
@@ -73,3 +75,36 @@ test_fmuladd.exit:                                   ; preds = %cond.else.i, %en
   ret void
 }
 
+; CHECK-LABEL: @minnum_test(
+; CHECK: select
+define void @minnum_test(float addrspace(1)* noalias nocapture %out, float %a, float %b) nounwind {
+entry:
+  %cmp.i = fcmp olt float %a, 0.000000e+00
+  br i1 %cmp.i, label %test_minnum.exit, label %cond.else.i
+
+cond.else.i:                                      ; preds = %entry
+  %0 = tail call float @llvm.minnum.f32(float %a, float %b) nounwind readnone
+  br label %test_minnum.exit
+
+test_minnum.exit:                                   ; preds = %cond.else.i, %entry
+  %cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ]
+  store float %cond.i, float addrspace(1)* %out, align 4
+  ret void
+}
+
+; CHECK-LABEL: @maxnum_test(
+; CHECK: select
+define void @maxnum_test(float addrspace(1)* noalias nocapture %out, float %a, float %b) nounwind {
+entry:
+  %cmp.i = fcmp olt float %a, 0.000000e+00
+  br i1 %cmp.i, label %test_maxnum.exit, label %cond.else.i
+
+cond.else.i:                                      ; preds = %entry
+  %0 = tail call float @llvm.maxnum.f32(float %a, float %b) nounwind readnone
+  br label %test_maxnum.exit
+
+test_maxnum.exit:                                   ; preds = %cond.else.i, %entry
+  %cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ]
+  store float %cond.i, float addrspace(1)* %out, align 4
+  ret void
+}