diff options
Diffstat (limited to 'test/CodeGen/X86/this-return-64.ll')
-rw-r--r-- | test/CodeGen/X86/this-return-64.ll | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/test/CodeGen/X86/this-return-64.ll b/test/CodeGen/X86/this-return-64.ll new file mode 100644 index 0000000000..2b26a89e3c --- /dev/null +++ b/test/CodeGen/X86/this-return-64.ll @@ -0,0 +1,89 @@ +; RUN: llc < %s -mtriple=x86_64-pc-win32 | FileCheck %s + +%struct.A = type { i8 } +%struct.B = type { i32 } +%struct.C = type { %struct.B } +%struct.D = type { %struct.B } +%struct.E = type { %struct.B } + +declare %struct.A* @A_ctor(%struct.A* returned) +declare %struct.B* @B_ctor(%struct.B* returned, i32) + +declare %struct.A* @A_ctor_nothisret(%struct.A*) +declare %struct.B* @B_ctor_nothisret(%struct.B*, i32) + +define %struct.C* @C_ctor(%struct.C* %this, i32 %y) { +entry: +; CHECK: C_ctor: +; CHECK: jmp B_ctor # TAILCALL + %0 = getelementptr inbounds %struct.C* %this, i64 0, i32 0 + %call = tail call %struct.B* @B_ctor(%struct.B* %0, i32 %y) + ret %struct.C* %this +} + +define %struct.C* @C_ctor_nothisret(%struct.C* %this, i32 %y) { +entry: +; CHECK: C_ctor_nothisret: +; CHECK-NOT: jmp B_ctor_nothisret + %0 = getelementptr inbounds %struct.C* %this, i64 0, i32 0 + %call = tail call %struct.B* @B_ctor_nothisret(%struct.B* %0, i32 %y) + ret %struct.C* %this +} + +define %struct.D* @D_ctor(%struct.D* %this, i32 %y) { +entry: +; CHECK: D_ctor: +; CHECK: movq %rcx, [[SAVETHIS:%r[0-9a-z]+]] +; CHECK: callq A_ctor +; CHECK: movq [[SAVETHIS]], %rcx +; CHECK: jmp B_ctor # TAILCALL + %0 = bitcast %struct.D* %this to %struct.A* + %call = tail call %struct.A* @A_ctor(%struct.A* %0) + %1 = getelementptr inbounds %struct.D* %this, i64 0, i32 0 + %call2 = tail call %struct.B* @B_ctor(%struct.B* %1, i32 %y) +; (this next line would never be generated by Clang, actually) + %2 = bitcast %struct.A* %call to %struct.D* + ret %struct.D* %2 +} + +define %struct.D* @D_ctor_nothisret(%struct.D* %this, i32 %y) { +entry: +; CHECK: D_ctor_nothisret: +; CHECK: movq %rcx, [[SAVETHIS:%r[0-9a-z]+]] +; CHECK: callq A_ctor_nothisret +; CHECK: movq [[SAVETHIS]], %rcx +; CHECK-NOT: jmp B_ctor_nothisret + %0 = bitcast %struct.D* %this to %struct.A* + %call = tail call %struct.A* @A_ctor_nothisret(%struct.A* %0) + %1 = getelementptr inbounds %struct.D* %this, i64 0, i32 0 + %call2 = tail call %struct.B* @B_ctor_nothisret(%struct.B* %1, i32 %y) +; (this next line would never be generated by Clang, actually) + %2 = bitcast %struct.A* %call to %struct.D* + ret %struct.D* %2 +} + +define %struct.E* @E_ctor(%struct.E* %this, i32 %x) { +entry: +; CHECK: E_ctor: +; CHECK: movq %rcx, [[SAVETHIS:%r[0-9a-z]+]] +; CHECK: callq B_ctor +; CHECK: movq [[SAVETHIS]], %rcx +; CHECK: jmp B_ctor # TAILCALL + %b = getelementptr inbounds %struct.E* %this, i64 0, i32 0 + %call = tail call %struct.B* @B_ctor(%struct.B* %b, i32 %x) + %call4 = tail call %struct.B* @B_ctor(%struct.B* %b, i32 %x) + ret %struct.E* %this +} + +define %struct.E* @E_ctor_nothisret(%struct.E* %this, i32 %x) { +entry: +; CHECK: E_ctor_nothisret: +; CHECK: movq %rcx, [[SAVETHIS:%r[0-9a-z]+]] +; CHECK: callq B_ctor_nothisret +; CHECK: movq [[SAVETHIS]], %rcx +; CHECK-NOT: jmp B_ctor_nothisret + %b = getelementptr inbounds %struct.E* %this, i64 0, i32 0 + %call = tail call %struct.B* @B_ctor_nothisret(%struct.B* %b, i32 %x) + %call4 = tail call %struct.B* @B_ctor_nothisret(%struct.B* %b, i32 %x) + ret %struct.E* %this +} |