Vendor import of llvm trunk r178860:

http://llvm.org/svn/llvm-project/llvm/trunk@178860

1 files changed, 31 insertions, 0 deletions

diff --git a/test/CodeGen/X86/stack-update-frame-opcode.ll b/test/CodeGen/X86/stack-update-frame-opcode.ll
new file mode 100644
index 0000000..9a5a242
--- /dev/null
+++ b/test/CodeGen/X86/stack-update-frame-opcode.ll
@@ -0,0 +1,31 @@
+; RUN: llc -mtriple=x86_64-pc-linux -mcpu=corei7 < %s | FileCheck -check-prefix=CORE_LP64 %s
+; RUN: llc -mtriple=x86_64-pc-linux -mcpu=atom < %s | FileCheck -check-prefix=ATOM_LP64 %s
+; RUN: llc -mtriple=x86_64-pc-linux-gnux32 -mcpu=corei7 < %s | FileCheck -check-prefix=CORE_ILP32 %s
+; RUN: llc -mtriple=x86_64-pc-linux-gnux32 -mcpu=atom < %s | FileCheck -check-prefix=ATOM_ILP32 %s
+
+define i32 @bar(i32 %a) nounwind {
+entry:
+  %arr = alloca [400 x i32], align 16
+
+; There is a 2x2 variation matrix here:
+; Atoms use LEA to update the SP. Opcode bitness depends on data model.
+; Cores use sub/add to update the SP. Opcode bitness depends on data model.
+
+; CORE_LP64: subq $1608
+; CORE_ILP32: subl $1608
+; ATOM_LP64: leaq -1608
+; ATOM_ILP32: leal -1608
+
+  %arraydecay = getelementptr inbounds [400 x i32]* %arr, i64 0, i64 0
+  %call = call i32 @foo(i32 %a, i32* %arraydecay) nounwind
+  ret i32 %call
+
+; CORE_LP64: addq $1608
+; CORE_ILP32: addl $1608
+; ATOM_LP64: leaq 1608
+; ATOM_ILP32: leal 1608
+
+}
+
+declare i32 @foo(i32, i32*)
+