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; RUN: split-file %s %t
; RUN: opt -S --dxil-translate-metadata %t/not-distinct.ll 2>&1 | FileCheck %t/not-distinct.ll
; RUN: opt -S --dxil-translate-metadata %t/not-md.ll 2>&1 | FileCheck %t/not-md.ll
; Test that DXIL incompatible loop metadata is stripped
;--- not-distinct.ll
; Ensure it is stripped because it is not provided a distinct loop parent
; CHECK-NOT: {!"llvm.loop.unroll.disable"}
target triple = "dxilv1.0-unknown-shadermodel6.0-library"
define void @example_loop(i32 %n) {
entry:
br label %loop.header
loop.header:
%i = phi i32 [ 0, %entry ], [ %i.next, %loop.body ]
%cmp = icmp slt i32 %i, %n
br i1 %cmp, label %loop.body, label %exit
loop.body:
%i.next = add nsw i32 %i, 1
br label %loop.header, !llvm.loop !1
exit:
ret void
}
!1 = !{!"llvm.loop.unroll.disable"} ; first node must be a distinct self-reference
;--- not-md.ll
target triple = "dxilv1.0-unknown-shadermodel6.0-library"
define void @example_loop(i32 %n) {
entry:
br label %loop.header
loop.header:
%i = phi i32 [ 0, %entry ], [ %i.next, %loop.body ]
%cmp = icmp slt i32 %i, %n
br i1 %cmp, label %loop.body, label %exit
loop.body:
%i.next = add nsw i32 %i, 1
; CHECK: br label %loop.header, !llvm.loop ![[#LOOP_MD:]]
br label %loop.header, !llvm.loop !1
exit:
ret void
}
; CHECK: ![[#LOOP_MD:]] = distinct !{![[#LOOP_MD]]}
!1 = !{!1, i32 0} ; second operand is not a metadata node
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