derek.holloway
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45 lines
1.2 KiB
LLVM
45 lines
1.2 KiB
LLVM
; RUN: opt -passes=instcombine -S < %s | FileCheck -enable-var-scope %s
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declare i32 @k() convergent
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declare i32 @f()
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declare i64 @llvm.read_register.i64(metadata) nounwind
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define i32 @extern() {
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; Convergent attr shouldn't be removed here; k is convergent.
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; CHECK: call i32 @k() [[$CONVERGENT_ATTR:#[0-9]+]]
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%a = call i32 @k() convergent
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ret i32 %a
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}
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define i32 @extern_no_attr() {
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; Convergent attr shouldn't be added here, even though k is convergent.
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; CHECK: call i32 @k(){{$}}
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%a = call i32 @k()
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ret i32 %a
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}
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define i32 @no_extern() {
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; Convergent should be removed here, as the target is convergent.
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; CHECK: call i32 @f(){{$}}
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%a = call i32 @f() convergent
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ret i32 %a
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}
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define i32 @indirect_call(ptr %f) {
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; CHECK: call i32 %f() [[$CONVERGENT_ATTR]]
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%a = call i32 %f() convergent
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ret i32 %a
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}
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; do not remove from convergent intrinsic call sites
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; CHECK-LABEL: @convergent_intrinsic_call(
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; CHECK: call i64 @llvm.read_register.i64(metadata !0) [[$CONVERGENT_ATTR]]
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define i64 @convergent_intrinsic_call() {
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%val = call i64 @llvm.read_register.i64(metadata !0) convergent
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ret i64 %val
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}
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; CHECK: [[$CONVERGENT_ATTR]] = { convergent }
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!0 = !{!"foo"}
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