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