[PATCH] statepoint-call-lowering: relocate array and vector

[Ramkumar Ramachandra]

Hi reames, sanjoy,

This is mainly to present the direction in which future work
is going, and gather early feedback.

http://reviews.llvm.org/D6938

Files:
  test/CodeGen/X86/statepoint-call-lowering.ll

Index: test/CodeGen/X86/statepoint-call-lowering.ll
===================================================================
--- test/CodeGen/X86/statepoint-call-lowering.ll
+++ test/CodeGen/X86/statepoint-call-lowering.ll
@@ -60,7 +60,7 @@
   ret float %call1
 }
 
-define i1 @test_relocate(i32* %a) {
+define i1 @test_relocate_noop(i32* %a) {
 ; CHECK-LABEL: test_relocate
 ; Check that an ununsed relocate has no code-generation impact
 ; CHECK: pushq %rax
@@ -75,6 +75,57 @@
   ret i1 %call2
 }
 
+define i32 @test_relocate_integer(i32* %i) {
+; CHECK-LABEL: test_relocate_integer
+; Check that relocation of an integer is lowered correctly
+; CHECK: pushq %rax
+; CHECK: callq return_i1
+; CHECK-NEXT: .Ltmp16:
+; CHECK-NEXT: movq (%rsp), %rax
+; CHECK-NEXT: movl (%rax), %eax
+; CHECK-NEXT: popq %rdx
+; CHECK-NEXT: retq
+entry:
+  %tok = tail call i32 (i1 ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, i32* %i)
+  %i-new = call i32* @llvm.experimental.gc.relocate.p0i32(i32 %tok, i32 4, i32 4)
+  %ret = load i32* %i-new
+  ret i32 %ret
+}
+
+define [3 x i32] @test_relocate_array([3 x i32]* %v) {
+; CHECK-LABEL: test_relocate_array
+; Check that relocation of an array of integers is lowered correctly
+; CHECK: pushq %rax
+; CHECK: callq return_i1
+; CHECK-NEXT: .Ltmp19:
+; CHECK-NEXT: movq (%rsp), %rcx
+; CHECK-NEXT: movl (%rcx), %eax
+; CHECK-NEXT: movl 4(%rcx), %edx
+; CHECK-NEXT: movl 8(%rcx), %ecx
+; CHECK-NEXT: popq %rsi
+; CHECK-NEXT: retq
+  %tok = call i32 (i1 ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, [3 x i32]* %v)
+  %v-new = call [3 x i32]* @llvm.experimental.gc.relocate.p0a3i32(i32 %tok, i32 4, i32 4)
+  %ret = load [3 x i32]* %v-new
+  ret [3 x i32] %ret
+}
+
+define <3 x i32> @test_relocate_vector(<3 x i32>* %v) {
+; CHECK-LABEL: test_relocate_vector
+; Check that relocation of a vector of integers is lowered correctly
+; CHECK: pushq %rax
+; CHECK: callq return_i1
+; CHECK-NEXT: .Ltmp22:
+; CHECK-NEXT: movq (%rsp), %rax
+; TODO: How should this be lowered?
+; CHECK: popq %rax
+; CHECK-NEXT: retq
+  %tok = call i32 (i1 ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, <3 x i32>* %v)
+  %v-new = call <3 x i32>* @llvm.experimental.gc.relocate.p0v3i32(i32 %tok, i32 4, i32 4)
+  %ret = load <3 x i32>* %v-new
+  ret <3 x i32> %ret
+}
+
 declare i32 @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()*, i32, i32, ...)
 declare i1 @llvm.experimental.gc.result.int.i1(i32)
 
@@ -88,3 +139,5 @@
 declare float @llvm.experimental.gc.result.float.f32(i32)
 
 declare i32* @llvm.experimental.gc.relocate.p0i32(i32, i32, i32)
+declare [3 x i32]* @llvm.experimental.gc.relocate.p0a3i32(i32, i32, i32)
+declare <3 x i32>* @llvm.experimental.gc.relocate.p0v3i32(i32, i32, i32)

EMAIL PREFERENCES
  http://reviews.llvm.org/settings/panel/emailpreferences/
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