a9b5753220
Because loops in coroutines may have a co_await statement that reschedules the coroutine to another thread, we cannot cache addresses of thread-local variables obtained inside a loop by moving the computation of thoes addresses outside a loop. Since LLVM doesn't have a model for coroutine memory accesses, this patch fixes this bug by disabling this optimization for coroutines in the same way as https://reviews.llvm.org/D135550 and https://reviews.llvm.org/D151774.
47 lines
1.6 KiB
LLVM
47 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -S -passes=loop-rotate < %s | FileCheck %s
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declare void @bar()
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@threadlocalint = thread_local global i32 0, align 4
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define void @foo() #0 {
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; CHECK-LABEL: define void @foo(
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; CHECK-SAME: ) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = tail call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @threadlocalint)
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; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[TMP0]], align 4
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; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[TMP1]], 0
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; CHECK-NEXT: br i1 [[CMP1]], label [[COND_END_LR_PH:%.*]], label [[COND_FALSE:%.*]]
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; CHECK: cond.end.lr.ph:
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; CHECK-NEXT: br label [[COND_END:%.*]]
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; CHECK: while.cond.cond.false_crit_edge:
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; CHECK-NEXT: br label [[COND_FALSE]]
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; CHECK: cond.false:
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; CHECK-NEXT: ret void
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; CHECK: cond.end:
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: [[TMP2:%.*]] = tail call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @threadlocalint)
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; CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[TMP2]], align 4
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP3]], 0
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; CHECK-NEXT: br i1 [[CMP]], label [[COND_END]], label [[WHILE_COND_COND_FALSE_CRIT_EDGE:%.*]]
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;
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entry:
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br label %while.cond
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while.cond:
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%1 = tail call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @threadlocalint)
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%2 = load i32, ptr %1, align 4
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%cmp = icmp eq i32 %2, 0
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br i1 %cmp, label %cond.end, label %cond.false
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cond.false:
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ret void
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cond.end:
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call void @bar()
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br label %while.cond
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}
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attributes #0 = { presplitcoroutine }
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