1; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt | FileCheck %s
2
3; Test that the wasm-store-results pass makes users of stored values use the
4; result of store expressions to reduce get_local/set_local traffic.
5
6target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
7target triple = "wasm32-unknown-unknown"
8
9; CHECK-LABEL: single_block:
10; CHECK-NOT: local
11; CHECK: i32.const $push{{[0-9]+}}=, 0{{$}}
12; CHECK: i32.store $push[[STORE:[0-9]+]]=, 0($0), $pop{{[0-9]+}}{{$}}
13; CHECK: return $pop[[STORE]]{{$}}
14define i32 @single_block(i32* %p) {
15entry:
16  store i32 0, i32* %p
17  ret i32 0
18}
19
20; Test interesting corner cases for wasm-store-results, in which the operand of
21; a store ends up getting used by a phi, which needs special handling in the
22; dominance test, since phis use their operands on their incoming edges.
23
24%class.Vec3 = type { float, float, float }
25
26@pos = global %class.Vec3 zeroinitializer, align 4
27
28; CHECK-LABEL: foo:
29; CHECK: i32.store $drop=, pos($pop{{[0-9]+}}), $pop{{[0-9]+}}{{$}}
30define void @foo() {
31for.body.i:
32  br label %for.body5.i
33
34for.body5.i:
35  %i.0168.i = phi i32 [ 0, %for.body.i ], [ %inc.i, %for.body5.i ]
36  %conv6.i = sitofp i32 %i.0168.i to float
37  store volatile float 0.0, float* getelementptr inbounds (%class.Vec3, %class.Vec3* @pos, i32 0, i32 0)
38  %inc.i = add nuw nsw i32 %i.0168.i, 1
39  %exitcond.i = icmp eq i32 %inc.i, 256
40  br i1 %exitcond.i, label %for.cond.cleanup4.i, label %for.body5.i
41
42for.cond.cleanup4.i:
43  ret void
44}
45
46; CHECK-LABEL: bar:
47; CHECK: i32.store $drop=, pos($pop{{[0-9]+}}), $pop{{[0-9]+}}{{$}}
48define void @bar() {
49for.body.i:
50  br label %for.body5.i
51
52for.body5.i:
53  %i.0168.i = phi float [ 0.0, %for.body.i ], [ %inc.i, %for.body5.i ]
54  store volatile float 0.0, float* getelementptr inbounds (%class.Vec3, %class.Vec3* @pos, i32 0, i32 0)
55  %inc.i = fadd float %i.0168.i, 1.0
56  %exitcond.i = fcmp oeq float %inc.i, 256.0
57  br i1 %exitcond.i, label %for.cond.cleanup4.i, label %for.body5.i
58
59for.cond.cleanup4.i:
60  ret void
61}
62
63; CHECK-LABEL: fi_ret:
64; CHECK: i32.store $push0=,
65; CHECK: return $pop0{{$}}
66define hidden i8* @fi_ret(i8** %addr) {
67entry:
68  %buf = alloca [27 x i8], align 16
69  %0 = getelementptr inbounds [27 x i8], [27 x i8]* %buf, i32 0, i32 0
70  store i8* %0, i8** %addr
71  ret i8* %0
72}
73