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47343c589d
Summary:
Move early uses of spilled variables after CoroBegin.
For example, if a parameter had address taken, we may end up with the code
like:
define @f(i32 %n) {
%n.addr = alloca i32
store %n, %n.addr
...
call @coro.begin
This patch fixes the problem by moving uses of spilled variables after CoroBegin.
Reviewers: majnemer
Subscribers: mehdi_amini, llvm-commits
Differential Revision: https://reviews.llvm.org/D24234
llvm-svn: 280678
68 lines
1.9 KiB
LLVM
68 lines
1.9 KiB
LLVM
; Need to move users of allocas that were moved into the coroutine frame after
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; coro.begin.
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; RUN: opt < %s -O2 -enable-coroutines -S | FileCheck %s
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define nonnull i8* @f(i32 %n) {
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entry:
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%id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null);
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%n.addr = alloca i32
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store i32 %n, i32* %n.addr ; this needs to go after coro.begin
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%0 = tail call i32 @llvm.coro.size.i32()
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%call = tail call i8* @malloc(i32 %0)
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%1 = tail call noalias nonnull i8* @llvm.coro.begin(token %id, i8* %call)
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%2 = bitcast i32* %n.addr to i8*
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call void @ctor(i8* %2)
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br label %for.cond
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for.cond:
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%3 = load i32, i32* %n.addr
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%dec = add nsw i32 %3, -1
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store i32 %dec, i32* %n.addr
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call void @print(i32 %3)
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%4 = call i8 @llvm.coro.suspend(token none, i1 false)
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%conv = sext i8 %4 to i32
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switch i32 %conv, label %coro_Suspend [
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i32 0, label %for.cond
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i32 1, label %coro_Cleanup
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]
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coro_Cleanup:
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%5 = call i8* @llvm.coro.free(token %id, i8* nonnull %1)
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call void @free(i8* %5)
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br label %coro_Suspend
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coro_Suspend:
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call void @llvm.coro.end(i8* null, i1 false)
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ret i8* %1
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}
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; CHECK-LABEL: @main
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define i32 @main() {
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entry:
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%hdl = call i8* @f(i32 4)
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call void @llvm.coro.resume(i8* %hdl)
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call void @llvm.coro.resume(i8* %hdl)
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call void @llvm.coro.destroy(i8* %hdl)
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ret i32 0
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; CHECK: call void @ctor
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; CHECK-NEXT: call void @print(i32 4)
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; CHECK-NEXT: call void @print(i32 3)
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; CHECK-NEXT: call void @print(i32 2)
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; CHECK: ret i32 0
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}
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declare i8* @malloc(i32)
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declare void @free(i8*)
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declare void @print(i32)
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declare void @ctor(i8* nocapture readonly)
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declare token @llvm.coro.id(i32, i8*, i8*, i8*)
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declare i32 @llvm.coro.size.i32()
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declare i8* @llvm.coro.begin(token, i8*)
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declare i8 @llvm.coro.suspend(token, i1)
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declare i8* @llvm.coro.free(token, i8*)
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declare void @llvm.coro.end(i8*, i1)
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declare void @llvm.coro.resume(i8*)
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declare void @llvm.coro.destroy(i8*)
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