When tailcallopt is enabled all fastcc calls must have an aligned argument stack size. Add a test case.

llvm-svn: 56119

1 files changed, 24 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/tailcall-stackalign.ll b/llvm/test/CodeGen/X86/tailcall-stackalign.ll
new file mode 100644
index 00000000000..80111925eec
--- /dev/null
+++ b/llvm/test/CodeGen/X86/tailcall-stackalign.ll
@@ -0,0 +1,24 @@
+; RUN: llvm-as < %s | llc  -mtriple=i686-unknown-linux  -tailcallopt | grep -A 1 call | grep -A 1 tailcaller | grep subl | grep 20
+; Linux has 8 byte alignment so the params cause stack size 20 when tailcallopt
+; is enabled, ensure that a normal fastcc call has matching stack size
+
+
+define fastcc i32 @tailcallee(i32 %a1, i32 %a2, i32 %a3, i32 %a4) {
+       ret i32 %a3
+}
+
+define fastcc i32 @tailcaller(i32 %in1, i32 %in2, i32 %in3, i32 %in4) {
+       %tmp11 = tail call fastcc i32 @tailcallee(i32 %in1, i32 %in2,
+                                                 i32 %in1, i32 %in2)
+       ret i32 %tmp11
+}
+
+define i32 @main(i32 %argc, i8** %argv) {
+ %tmp1 = call fastcc i32 @tailcaller( i32 1, i32 2, i32 3, i32 4 )
+ ; expect match subl [stacksize] here
+ ret i32 0
+}
+
+
+
+