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; RUN: llvm-as < %s -disable-output 2>&1 | FileCheck %s -allow-empty
; RUN: llvm-as < %s | llvm-dis > %t1.ll
; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
; RUN: diff %t1.ll %t2.ll
; RUN: llvm-as < %t1.ll -disable-output 2>&1 | FileCheck %s -allow-empty
; CHECK-NOT: error
; CHECK-NOT: warning
define void @mixed1() {
call void @g() ; not convergent
call void @f() ; uncontrolled convergent
call void @g() ; not convergent
ret void
}
define void @mixed2() {
call void @g() ; not convergent
%t1_tok1 = call token @llvm.experimental.convergence.anchor()
call void @f() [ "convergencectrl"(token %t1_tok1) ]
call void @g() ; not convergent
ret void
}
; convergence control token can be used on non-convergent calls,
; but it has no effect.
define void @mixed3() {
%t05_tok1 = call token @llvm.experimental.convergence.anchor()
call void @g() [ "convergencectrl"(token %t05_tok1) ]
ret void
}
define void @region_nesting1(i1 %arg) convergent {
A:
%tok1 = call token @llvm.experimental.convergence.entry()
%tok2 = call token @llvm.experimental.convergence.anchor()
br label %B
B:
br i1 %arg, label %C, label %D
C:
call void @f() [ "convergencectrl"(token %tok1) ]
ret void
D:
call void @f() [ "convergencectrl"(token %tok2) ]
ret void
}
; Mirror image of @region_nesting1
define void @region_nesting2(i1 %arg) {
A:
%tok1 = call token @llvm.experimental.convergence.anchor()
%tok2 = call token @llvm.experimental.convergence.anchor()
br label %B
B:
br i1 %arg, label %C, label %D
C:
call void @f() [ "convergencectrl"(token %tok2) ]
ret void
D:
call void @f() [ "convergencectrl"(token %tok1) ]
ret void
}
define void @loop_nesting(i1 %arg) convergent {
A:
%a = call token @llvm.experimental.convergence.entry()
br label %B
B:
%b = call token @llvm.experimental.convergence.anchor()
br i1 %arg, label %C, label %D
C:
%c = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token %b) ]
call void @f() [ "convergencectrl"(token %c) ]
br label %B
D:
call void @f() [ "convergencectrl"(token %b) ]
br i1 %arg, label %B, label %E
E:
ret void
}
declare void @f() convergent
declare void @g()
declare token @llvm.experimental.convergence.entry()
declare token @llvm.experimental.convergence.anchor()
declare token @llvm.experimental.convergence.loop()
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