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| ; RUN: opt < %s -enable-coroutines -O2 -S | FileCheck %s
define i8* @f(i8* %buffer, i32 %n) {
entry:
%id = call token @llvm.coro.id.retcon(i32 8, i32 4, i8* %buffer, i8* bitcast (i8* (i8*, i32, i1)* @prototype to i8*), i8* bitcast (i8* (i32)* @allocate to i8*), i8* bitcast (void (i8*)* @deallocate to i8*))
%hdl = call i8* @llvm.coro.begin(token %id, i8* null)
br label %loop
loop:
%n.val = phi i32 [ %n, %entry ], [ %sum, %resume ]
%values = call { i32, i1 } (...) @llvm.coro.suspend.retcon.sl_i32i1s()
%finished = extractvalue { i32, i1 } %values, 1
br i1 %finished, label %cleanup, label %resume
resume:
%input = extractvalue { i32, i1 } %values, 0
%sum = add i32 %n.val, %input
br label %loop
cleanup:
call void @print(i32 %n.val)
call i1 @llvm.coro.end(i8* %hdl, i1 0)
unreachable
}
; CHECK-LABEL: define i8* @f(i8* %buffer, i32 %n)
; CHECK-NEXT: entry:
; CHECK-NEXT: [[T0:%.*]] = bitcast i8* %buffer to i32*
; CHECK-NEXT: store i32 %n, i32* [[T0]], align 4
; CHECK-NEXT: ret i8* bitcast (i8* (i8*, i32, i1)* @f.resume.0 to i8*)
; CHECK-NEXT: }
; CHECK-LABEL: define internal i8* @f.resume.0(i8* noalias nonnull %0, i32 %1, i1 zeroext %2)
; CHECK-NEXT: :
; CHECK-NEXT: [[T0:%.*]] = bitcast i8* %0 to i32*
; CHECK-NEXT: [[T1:%.*]] = load i32, i32* [[T0]], align 4
; CHECK-NEXT: br i1 %2,
; CHECK: :
; CHECK-NEXT: %sum = add i32 [[T1]], %1
; CHECK-NEXT: store i32 %sum, i32* [[T0]], align 4
; CHECK-NEXT: ret i8* bitcast (i8* (i8*, i32, i1)* @f.resume.0 to i8*)
; CHECK: :
; CHECK-NEXT: call void @print(i32 [[T1]])
; CHECK-NEXT: ret i8* null
; CHECK-NEXT: }
define i32 @main() {
entry:
%0 = alloca [8 x i8], align 4
%buffer = bitcast [8 x i8]* %0 to i8*
%prepare = call i8* @llvm.coro.prepare.retcon(i8* bitcast (i8* (i8*, i32)* @f to i8*))
%f = bitcast i8* %prepare to i8* (i8*, i32)*
%cont0 = call i8* %f(i8* %buffer, i32 1)
%cont0.cast = bitcast i8* %cont0 to i8* (i8*, i32, i1)*
%cont1 = call i8* %cont0.cast(i8* %buffer, i32 2, i1 zeroext false)
%cont1.cast = bitcast i8* %cont1 to i8* (i8*, i32, i1)*
%cont2 = call i8* %cont1.cast(i8* %buffer, i32 4, i1 zeroext false)
%cont2.cast = bitcast i8* %cont2 to i8* (i8*, i32, i1)*
call i8* %cont2.cast(i8* %buffer, i32 100, i1 zeroext true)
ret i32 0
}
; Unfortunately, we don't seem to fully optimize this right now due
; to some sort of phase-ordering thing.
; CHECK-LABEL: define i32 @main
; CHECK-NEXT: entry:
; CHECK: [[BUFFER:%.*]] = alloca [8 x i8], align 4
; CHECK: [[SLOT:%.*]] = bitcast [8 x i8]* [[BUFFER]] to i32*
; CHECK-NEXT: store i32 7, i32* [[SLOT]], align 4
; CHECK-NEXT: call void @print(i32 7)
; CHECK-NEXT: ret i32 0
declare token @llvm.coro.id.retcon(i32, i32, i8*, i8*, i8*, i8*)
declare i8* @llvm.coro.begin(token, i8*)
declare { i32, i1 } @llvm.coro.suspend.retcon.sl_i32i1s(...)
declare i1 @llvm.coro.end(i8*, i1)
declare i8* @llvm.coro.prepare.retcon(i8*)
declare i8* @prototype(i8*, i32, i1 zeroext)
declare noalias i8* @allocate(i32 %size)
declare void @deallocate(i8* %ptr)
declare void @print(i32)
|