108 lines
2.7 KiB
LLVM
108 lines
2.7 KiB
LLVM
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; RUN: opt -function-attrs -S < %s | FileCheck %s
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; RUN: opt -passes=function-attrs -S < %s | FileCheck %s
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; CHECK: Function Attrs
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; CHECK-NOT: convergent
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; CHECK-NEXT: define i32 @nonleaf()
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define i32 @nonleaf() convergent {
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%a = call i32 @leaf()
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ret i32 %a
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}
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; CHECK: Function Attrs
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; CHECK-NOT: convergent
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; CHECK-NEXT: define i32 @leaf()
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define i32 @leaf() convergent {
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ret i32 0
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}
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; CHECK: Function Attrs
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; CHECK-SAME: convergent
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; CHECK-NEXT: declare i32 @k()
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declare i32 @k() convergent
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; CHECK: Function Attrs
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; CHECK-SAME: convergent
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; CHECK-NEXT: define i32 @extern()
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define i32 @extern() convergent {
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%a = call i32 @k() convergent
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ret i32 %a
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}
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; Convergent should not be removed on the function here. Although the call is
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; not explicitly convergent, it picks up the convergent attr from the callee.
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;
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; CHECK: Function Attrs
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; CHECK-SAME: convergent
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; CHECK-NEXT: define i32 @extern_non_convergent_call()
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define i32 @extern_non_convergent_call() convergent {
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%a = call i32 @k()
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ret i32 %a
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}
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; CHECK: Function Attrs
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; CHECK-SAME: convergent
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; CHECK-NEXT: define i32 @indirect_convergent_call(
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define i32 @indirect_convergent_call(i32 ()* %f) convergent {
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%a = call i32 %f() convergent
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ret i32 %a
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}
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; Give indirect_non_convergent_call the norecurse attribute so we get a
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; "Function Attrs" comment in the output.
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;
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; CHECK: Function Attrs
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; CHECK-NOT: convergent
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; CHECK-NEXT: define i32 @indirect_non_convergent_call(
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define i32 @indirect_non_convergent_call(i32 ()* %f) convergent norecurse {
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%a = call i32 %f()
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ret i32 %a
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}
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; CHECK: Function Attrs
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; CHECK-SAME: convergent
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; CHECK-NEXT: declare void @llvm.nvvm.barrier0()
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declare void @llvm.nvvm.barrier0() convergent
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; CHECK: Function Attrs
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; CHECK-SAME: convergent
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; CHECK-NEXT: define i32 @intrinsic()
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define i32 @intrinsic() convergent {
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; Implicitly convergent, because the intrinsic is convergent.
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call void @llvm.nvvm.barrier0()
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ret i32 0
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}
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; CHECK: Function Attrs
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; CHECK-NOT: convergent
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; CHECK-NEXT: define i32 @recursive1()
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define i32 @recursive1() convergent {
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%a = call i32 @recursive2() convergent
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ret i32 %a
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}
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; CHECK: Function Attrs
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; CHECK-NOT: convergent
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; CHECK-NEXT: define i32 @recursive2()
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define i32 @recursive2() convergent {
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%a = call i32 @recursive1() convergent
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ret i32 %a
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}
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; CHECK: Function Attrs
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; CHECK-SAME: convergent
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; CHECK-NEXT: define i32 @noopt()
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define i32 @noopt() convergent optnone noinline {
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%a = call i32 @noopt_friend() convergent
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ret i32 0
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}
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; A function which is mutually-recursive with a convergent, optnone function
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; shouldn't have its convergent attribute stripped.
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; CHECK: Function Attrs
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; CHECK-SAME: convergent
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; CHECK-NEXT: define i32 @noopt_friend()
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define i32 @noopt_friend() convergent {
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%a = call i32 @noopt()
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ret i32 0
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}
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