Add a regression test for x86-64 red zone usage.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63075 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/red-zone.ll b/test/CodeGen/X86/red-zone.ll
new file mode 100644 (file)
index 0000000..60e16b0
--- /dev/null
+++ b/test/CodeGen/X86/red-zone.ll
@@ -0,0 +1,13 @@
+; RUN: llvm-as < %s | llc -march=x86-64 > %t
+; RUN: not grep subq %t
+; RUN: not grep addq %t
+; RUN: grep {\\-4(%%rsp)} %t | count 2
+; RUN: llvm-as < %s | llc -march=x86-64 -disable-red-zone > %t
+; RUN: grep subq %t | count 1
+; RUN: grep addq %t | count 1
+
+define x86_fp80 @f0(float %f) nounwind readnone {
+entry:
+       %0 = fpext float %f to x86_fp80         ; <x86_fp80> [#uses=1]
+       ret x86_fp80 %0
+}