[mips] Do not tail-call optimize vararg functions or functions with byval
arguments.
This is rather conservative and should be fixed later to be more aggressive.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166851 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/Mips/tailcall.ll b/test/CodeGen/Mips/tailcall.ll
index 4989636..e82b1e3 100644
--- a/test/CodeGen/Mips/tailcall.ll
+++ b/test/CodeGen/Mips/tailcall.ll
@@ -66,9 +66,15 @@
define i32 @caller5() nounwind readonly {
entry:
+; PIC32: .ent caller5
; PIC32-NOT: jalr
+; PIC32: .end caller5
+; STATIC32: .ent caller5
; STATIC32-NOT: jal
+; STATIC32: .end caller5
+; N64: .ent caller5
; N64-NOT: jalr
+; N64: .end caller5
%0 = load i32* @g0, align 4
%1 = load i32* @g1, align 4
@@ -98,3 +104,55 @@
ret i32 %add8
}
+declare i32 @callee8(i32, ...)
+
+define i32 @caller8_0() nounwind {
+entry:
+ %call = tail call fastcc i32 @caller8_1()
+ ret i32 %call
+}
+
+define internal fastcc i32 @caller8_1() nounwind noinline {
+entry:
+; PIC32: .ent caller8_1
+; PIC32: jalr
+; PIC32: .end caller8_1
+; STATIC32: .ent caller8_1
+; STATIC32: jal
+; STATIC32: .end caller8_1
+; N64: .ent caller8_1
+; N64: jalr
+; N64: .end caller8_1
+
+ %call = tail call i32 (i32, ...)* @callee8(i32 2, i32 1) nounwind
+ ret i32 %call
+}
+
+%struct.S = type { [2 x i32] }
+
+@gs1 = external global %struct.S
+
+declare i32 @callee9(%struct.S* byval)
+
+define i32 @caller9_0() nounwind {
+entry:
+ %call = tail call fastcc i32 @caller9_1()
+ ret i32 %call
+}
+
+define internal fastcc i32 @caller9_1() nounwind noinline {
+entry:
+; PIC32: .ent caller9_1
+; PIC32: jalr
+; PIC32: .end caller9_1
+; STATIC32: .ent caller9_1
+; STATIC32: jal
+; STATIC32: .end caller9_1
+; N64: .ent caller9_1
+; N64: jalr
+; N64: .end caller9_1
+
+ %call = tail call i32 @callee9(%struct.S* byval @gs1) nounwind
+ ret i32 %call
+}
+