1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; First example from Doc/Coroutines.rst (two block loop) converted to retcon
3 ; RUN: opt < %s -enable-coroutines -passes='default<O2>' -S | FileCheck %s
5 define {i8*, i32} @f(i8* %buffer, i32 %n) {
7 ; CHECK-NEXT: coro.return:
8 ; CHECK-NEXT: [[N_VAL_SPILL_ADDR:%.*]] = bitcast i8* [[BUFFER:%.*]] to i32*
9 ; CHECK-NEXT: store i32 [[N:%.*]], i32* [[N_VAL_SPILL_ADDR]], align 4
10 ; CHECK-NEXT: [[TMP0:%.*]] = insertvalue { i8*, i32 } { i8* bitcast ({ i8*, i32 } (i8*, i8)* @f.resume.0 to i8*), i32 undef }, i32 [[N]], 1
11 ; CHECK-NEXT: ret { i8*, i32 } [[TMP0]]
14 %id = call token @llvm.coro.id.retcon(i32 8, i32 4, i8* %buffer, i8* bitcast ({i8*, i32} (i8*, i8)* @prototype to i8*), i8* bitcast (i8* (i32)* @allocate to i8*), i8* bitcast (void (i8*)* @deallocate to i8*))
15 %hdl = call i8* @llvm.coro.begin(token %id, i8* null)
19 %n.val = phi i32 [ %n, %entry ], [ %inc, %resume ]
20 %unwind = call i8 (...) @llvm.coro.suspend.retcon.i8(i32 %n.val)
21 %unwind0 = icmp ne i8 %unwind, 0
22 br i1 %unwind0, label %cleanup, label %resume
25 %inc = add i32 %n.val, 1
29 call i1 @llvm.coro.end(i8* %hdl, i1 0)
38 ; CHECK-NEXT: [[TMP0:%.*]] = alloca [8 x i8], align 4
39 ; CHECK-NEXT: [[DOTSUB:%.*]] = getelementptr inbounds [8 x i8], [8 x i8]* [[TMP0]], i64 0, i64 0
40 ; CHECK-NEXT: [[N_VAL_SPILL_ADDR_I:%.*]] = bitcast [8 x i8]* [[TMP0]] to i32*
41 ; CHECK-NEXT: store i32 4, i32* [[N_VAL_SPILL_ADDR_I]], align 4
42 ; CHECK-NEXT: call void @print(i32 4)
43 ; CHECK-NEXT: [[N_VAL_RELOAD_I:%.*]] = load i32, i32* [[N_VAL_SPILL_ADDR_I]], align 4, !alias.scope !0
44 ; CHECK-NEXT: [[INC_I:%.*]] = add i32 [[N_VAL_RELOAD_I]], 1
45 ; CHECK-NEXT: store i32 [[INC_I]], i32* [[N_VAL_SPILL_ADDR_I]], align 4, !alias.scope !0
46 ; CHECK-NEXT: call void @print(i32 [[INC_I]])
47 ; CHECK-NEXT: [[N_VAL_RELOAD_I3:%.*]] = load i32, i32* [[N_VAL_SPILL_ADDR_I]], align 4, !alias.scope !3
48 ; CHECK-NEXT: [[INC_I4:%.*]] = add i32 [[N_VAL_RELOAD_I3]], 1
49 ; CHECK-NEXT: store i32 [[INC_I4]], i32* [[N_VAL_SPILL_ADDR_I]], align 4, !alias.scope !3
50 ; CHECK-NEXT: call void @print(i32 [[INC_I4]])
51 ; CHECK-NEXT: ret i32 0
54 %0 = alloca [8 x i8], align 4
55 %buffer = bitcast [8 x i8]* %0 to i8*
56 %prepare = call i8* @llvm.coro.prepare.retcon(i8* bitcast ({i8*, i32} (i8*, i32)* @f to i8*))
57 %f = bitcast i8* %prepare to {i8*, i32} (i8*, i32)*
58 %result0 = call {i8*, i32} %f(i8* %buffer, i32 4)
59 %value0 = extractvalue {i8*, i32} %result0, 1
60 call void @print(i32 %value0)
61 %cont0 = extractvalue {i8*, i32} %result0, 0
62 %cont0.cast = bitcast i8* %cont0 to {i8*, i32} (i8*, i8)*
63 %result1 = call {i8*, i32} %cont0.cast(i8* %buffer, i8 zeroext 0)
64 %value1 = extractvalue {i8*, i32} %result1, 1
65 call void @print(i32 %value1)
66 %cont1 = extractvalue {i8*, i32} %result1, 0
67 %cont1.cast = bitcast i8* %cont1 to {i8*, i32} (i8*, i8)*
68 %result2 = call {i8*, i32} %cont1.cast(i8* %buffer, i8 zeroext 0)
69 %value2 = extractvalue {i8*, i32} %result2, 1
70 call void @print(i32 %value2)
71 %cont2 = extractvalue {i8*, i32} %result2, 0
72 %cont2.cast = bitcast i8* %cont2 to {i8*, i32} (i8*, i8)*
73 call {i8*, i32} %cont2.cast(i8* %buffer, i8 zeroext 1)
77 ; Unfortunately, we don't seem to fully optimize this right now due
78 ; to some sort of phase-ordering thing.
80 declare token @llvm.coro.id.retcon(i32, i32, i8*, i8*, i8*, i8*)
81 declare i8* @llvm.coro.begin(token, i8*)
82 declare i8 @llvm.coro.suspend.retcon.i8(...)
83 declare i1 @llvm.coro.end(i8*, i1)
84 declare i8* @llvm.coro.prepare.retcon(i8*)
86 declare {i8*, i32} @prototype(i8*, i8 zeroext)
88 declare noalias i8* @allocate(i32 %size)
89 declare void @deallocate(i8* %ptr)
91 declare void @print(i32)