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; RUN: split-file %s %t
; RUN: opt -S --dxil-translate-metadata %t/count.ll | FileCheck %t/count.ll
; RUN: opt -S --dxil-translate-metadata %t/disable.ll | FileCheck %t/disable.ll
; RUN: opt -S --dxil-translate-metadata %t/full.ll | FileCheck %t/full.ll
;--- count.ll
; Test that we collapse a self-referential chain and allow a unroll.count hint
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 !0
exit:
ret void
}
; CHECK: ![[#LOOP_MD]] = distinct !{![[#LOOP_MD]], ![[#COUNT:]]}
; CHECK: ![[#COUNT]] = !{!"llvm.loop.unroll.count", i6 4}
!0 = !{!0, !1}
!1 = !{!1, !2}
!2 = !{!"llvm.loop.unroll.count", i6 4}
;--- disable.ll
; Test that we allow a disable hint
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 !0
exit:
ret void
}
; CHECK: ![[#LOOP_MD]] = distinct !{![[#LOOP_MD]], ![[#DISABLE:]]}
; CHECK: ![[#DISABLE]] = !{!"llvm.loop.unroll.disable"}
!0 = !{!0, !1}
!1 = !{!"llvm.loop.unroll.disable"}
;--- full.ll
; Test that we allow a full hint
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 !0
exit:
ret void
}
; CHECK: ![[#LOOP_MD]] = distinct !{![[#LOOP_MD]], ![[#FULL:]]}
; CHECK: ![[#FULL]] = !{!"llvm.loop.unroll.full"}
!0 = !{!0, !1}
!1 = !{!"llvm.loop.unroll.full"}
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