Add a testcase that checks that we generate functions with frame

pointers or not depending upon the function attributes.

llvm-svn: 181180

llvm/test/CodeGen/X86/fp-elim-and-no-fp-elim.ll

+; RUN: llc < %s -mtriple x86_64-apple-darwin | FileCheck %s
+
+define void @bar(i32 %argc) #0 {
+; CHECK: bar:
+; CHECK: pushq %rbp
+entry:
+  %conv = sitofp i32 %argc to double
+  %mul = fmul double %conv, 3.792700e+01
+  %conv1 = fptrunc double %mul to float
+  %div = fdiv double 9.273700e+02, %conv
+  %conv3 = fptrunc double %div to float
+  tail call void @foo(float %conv1, float %conv3)
+  ret void
+}
+
+define void @qux(i32 %argc) #1 {
+; CHECK: qux:
+; CHECK-NOT: pushq %rbp
+entry:
+  %conv = sitofp i32 %argc to double
+  %mul = fmul double %conv, 3.792700e+01
+  %conv1 = fptrunc double %mul to float
+  %div = fdiv double 9.273700e+02, %conv
+  %conv3 = fptrunc double %div to float
+  tail call void @foo(float %conv1, float %conv3)
+  ret void
+}
+
+declare void @foo(float, float)
+
+attributes #0 = { nounwind ssp uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { nounwind ssp uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }