Optimize local func calls to not emit nop for TOC restoration.

Patch by Adhemerval Zanella.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164138 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 49 insertions, 0 deletions

diff --git a/test/CodeGen/PowerPC/ppc64-calls.ll b/test/CodeGen/PowerPC/ppc64-calls.ll
new file mode 100644
index 00000000000..1193fd2d8db
--- /dev/null
+++ b/test/CodeGen/PowerPC/ppc64-calls.ll
@@ -0,0 +1,49 @@
+; RUN: llc < %s -march=ppc64 | FileCheck %s
+target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32:64"
+target triple = "powerpc64-unknown-linux-gnu"
+
+define void @foo() nounwind readnone noinline {
+  ret void
+}
+
+; Calls to local function does not require the TOC restore 'nop'
+define void @test_direct() nounwind readnone {
+; CHECK: test_direct:
+  tail call void @foo() nounwind
+; CHECK: bl foo
+; CHECK-NOT: nop
+  ret void
+}
+
+; Indirect calls requires a full stub creation
+define void @test_indirect(void ()* nocapture %fp) nounwind {
+; CHECK: test_indirect:
+  tail call void %fp() nounwind
+; CHECK: ld [[FP:[0-9]+]], 0(3)
+; CHECK: ld 11, 16(3)
+; CHECK: ld 2, 8(3)
+; CHECK-NEXT: mtctr [[FP]]
+; CHECK-NEXT: bctrl
+; CHECK-NEXT: ld 2, 40(1)
+  ret void
+}
+
+; Absolute vales should be have the TOC restore 'nop'
+define void @test_abs() nounwind {
+; CHECK: test_abs:
+  tail call void inttoptr (i64 1024 to void ()*)() nounwind
+; CHECK: bla 1024
+; CHECK-NEXT: nop
+  ret void
+}
+
+declare double @sin(double) nounwind
+
+; External functions call should also have a 'nop'
+define double @test_external(double %x) nounwind {
+; CHECK: test_external:
+  %call = tail call double @sin(double %x) nounwind
+; CHECK: bl sin
+; CHECK-NEXT: nop
+  ret double %call
+}