1 files changed, 34 insertions, 0 deletions
diff --git a/test/CodeGen/AArch64/arm64-fmax.ll b/test/CodeGen/AArch64/arm64-fmax.ll
new file mode 100644
index 0000000000..94b745437b
--- /dev/null
+++ b/test/CodeGen/AArch64/arm64-fmax.ll
@@ -0,0 +1,34 @@
+; RUN: llc -march=arm64 -enable-no-nans-fp-math < %s | FileCheck %s
+
+define double @test_direct(float %in) #1 {
+; CHECK-LABEL: test_direct:
+  %cmp = fcmp olt float %in, 0.000000e+00
+  %longer = fpext float %in to double
+  %val = select i1 %cmp, double 0.000000e+00, double %longer
+  ret double %val
+
+; CHECK: fmax
+}
+
+define double @test_cross(float %in) #1 {
+; CHECK-LABEL: test_cross:
+  %cmp = fcmp olt float %in, 0.000000e+00
+  %longer = fpext float %in to double
+  %val = select i1 %cmp, double %longer, double 0.000000e+00
+  ret double %val
+
+; CHECK: fmin
+}
+
+; This isn't a min or a max, but passes the first condition for swapping the
+; results. Make sure they're put back before we resort to the normal fcsel.
+define float @test_cross_fail(float %lhs, float %rhs) {
+; CHECK-LABEL: test_cross_fail:
+  %tst = fcmp une float %lhs, %rhs
+  %res = select i1 %tst, float %rhs, float %lhs
+  ret float %res
+
+  ; The register allocator would have to decide to be deliberately obtuse before
+  ; other register were used.
+; CHECK: fcsel s0, s1, s0, ne
+}
+\ No newline at end of file