1 ; RUN: llc < %s | FileCheck %s
3 target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
4 target triple = "x86_64-pc-linux-gnu"
6 ; This test is checking to make sure that we reuse the same stack slots
7 ; for GC values spilled over two different call sites. Since the order
8 ; of GC arguments differ, niave lowering code would insert loads and
9 ; stores to rearrange items on the stack. We need to make sure (for
10 ; performance) that this doesn't happen.
11 define i32 @back_to_back_calls(i32 addrspace(1)* %a, i32 addrspace(1)* %b, i32 addrspace(1)* %c) #1 gc "statepoint-example" {
12 ; CHECK-LABEL: back_to_back_calls
13 ; The exact stores don't matter, but there need to be three stack slots created
14 ; CHECK: movq %rdi, 16(%rsp)
15 ; CHECK: movq %rdx, 8(%rsp)
16 ; CHECK: movq %rsi, (%rsp)
17 ; There should be no more than three moves
19 %safepoint_token = tail call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0, i32 addrspace(1)* %a, i32 addrspace(1)* %b, i32 addrspace(1)* %c)
20 %a1 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token, i32 12, i32 12)
21 %b1 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token, i32 12, i32 13)
22 %c1 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token, i32 12, i32 14)
24 ; This is the key check. There should NOT be any memory moves here
26 %safepoint_token2 = tail call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0, i32 addrspace(1)* %c1, i32 addrspace(1)* %b1, i32 addrspace(1)* %a1)
27 %a2 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token2, i32 12, i32 14)
28 %b2 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token2, i32 12, i32 13)
29 %c2 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token2, i32 12, i32 12)
34 ; This test simply checks that minor changes in vm state don't prevent slots
35 ; being reused for gc values.
36 define i32 @reserve_first(i32 addrspace(1)* %a, i32 addrspace(1)* %b, i32 addrspace(1)* %c) #1 gc "statepoint-example" {
37 ; CHECK-LABEL: reserve_first
38 ; The exact stores don't matter, but there need to be three stack slots created
39 ; CHECK: movq %rdi, 16(%rsp)
40 ; CHECK: movq %rdx, 8(%rsp)
41 ; CHECK: movq %rsi, (%rsp)
42 %safepoint_token = tail call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0, i32 addrspace(1)* %a, i32 addrspace(1)* %b, i32 addrspace(1)* %c)
43 %a1 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token, i32 12, i32 12)
44 %b1 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token, i32 12, i32 13)
45 %c1 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token, i32 12, i32 14)
47 ; This is the key check. There should NOT be any memory moves here
49 %safepoint_token2 = tail call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 5, i32 addrspace(1)* %a1, i32 0, i32 addrspace(1)* %c1, i32 0, i32 0, i32 addrspace(1)* %c1, i32 addrspace(1)* %b1, i32 addrspace(1)* %a1)
50 %a2 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token2, i32 12, i32 14)
51 %b2 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token2, i32 12, i32 13)
52 %c2 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token2, i32 12, i32 12)
57 ; Test that stack slots are reused for invokes
58 define i32 @back_to_back_invokes(i32 addrspace(1)* %a, i32 addrspace(1)* %b, i32 addrspace(1)* %c) #1 gc "statepoint-example" personality i32 ()* @"personality_function" {
59 ; CHECK-LABEL: back_to_back_invokes
61 ; The exact stores don't matter, but there need to be three stack slots created
62 ; CHECK: movq %rdi, 16(%rsp)
63 ; CHECK: movq %rdx, 8(%rsp)
64 ; CHECK: movq %rsi, (%rsp)
66 %safepoint_token = invoke i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0, i32 addrspace(1)* %a, i32 addrspace(1)* %b, i32 addrspace(1)* %c)
67 to label %normal_return unwind label %exceptional_return
70 %a1 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token, i32 12, i32 12)
71 %b1 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token, i32 12, i32 13)
72 %c1 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token, i32 12, i32 14)
73 ; Should work even through bitcasts
74 %c1.casted = bitcast i32 addrspace(1)* %c1 to i8 addrspace(1)*
75 ; This is the key check. There should NOT be any memory moves here
78 %safepoint_token2 = invoke i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0, i8 addrspace(1)* %c1.casted, i32 addrspace(1)* %b1, i32 addrspace(1)* %a1)
79 to label %normal_return2 unwind label %exceptional_return2
82 %a2 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token2, i32 12, i32 14)
83 %b2 = tail call coldcc i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %safepoint_token2, i32 12, i32 13)
84 %c2 = tail call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(i32 %safepoint_token2, i32 12, i32 12)
88 %landing_pad = landingpad { i8*, i32 }
93 %landing_pad2 = landingpad { i8*, i32 }
98 ; Function Attrs: nounwind
99 declare i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32, i32, i32) #3
100 declare i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(i32, i32, i32) #3
102 declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
104 declare i32 @"personality_function"()
106 attributes #1 = { uwtable }