Round up the size of byval arguments to MinAlign

[oota-llvm.git] / test / CodeGen / X86 / byval-callee-cleanup.ll

diff --git a/test/CodeGen/X86/byval-callee-cleanup.ll b/test/CodeGen/X86/byval-callee-cleanup.ll
new file mode 100644 (file)
index 0000000..61e2369
--- /dev/null
+++ b/test/CodeGen/X86/byval-callee-cleanup.ll
@@ -0,0 +1,28 @@
+; RUN: llc < %s -march=x86 | FileCheck %s
+
+; Previously we would forget to align to stack slot alignment after placing a
+; byval argument.  Subsequent arguments would align themselves, but if it was
+; the last argument, the argument size would not be a multiple of stack slot
+; size. This resulted in retl $6 in callee-cleanup functions, as well as subtle
+; varargs bugs.
+
+%struct.Six = type { [6 x i8] }
+
+define x86_stdcallcc void @f(%struct.Six* byval %a) {
+  ret void
+}
+; CHECK-LABEL: _f@8:
+; CHECK: retl $8
+
+define x86_thiscallcc void @g(i8* %this, %struct.Six* byval %a) {
+  ret void
+}
+; CHECK-LABEL: _g:
+; CHECK: retl $8
+
+define x86_fastcallcc void @h(i32 inreg %x, i32 inreg %y, %struct.Six* byval %a) {
+  ret void
+}
+; FIXME: This should be @h@8.
+; CHECK-LABEL: @h@16:
+; CHECK: retl $8