3747b69b53
83daa49758a1 made loop-rotate more conservative in the presence of function calls in the prepare-for-lto stage. The code did not properly account for calls that are no actual function calls, like calls to intrinsics. This patch updates the code to ensure only calls that are lowered to actual calls are considered inline candidates.
102 lines
4.3 KiB
LLVM
102 lines
4.3 KiB
LLVM
; RUN: opt -S -loop-rotate < %s | FileCheck --check-prefix=FULL %s
|
|
; RUN: opt -S -loop-rotate -rotation-prepare-for-lto < %s | FileCheck --check-prefix=PREPARE %s
|
|
; RUN: opt -S -passes='require<targetir>,require<assumptions>,loop(loop-rotate)' < %s | FileCheck --check-prefix=FULL %s
|
|
; RUN: opt -S -passes='require<targetir>,require<assumptions>,loop(loop-rotate)' -rotation-prepare-for-lto < %s | FileCheck --check-prefix=PREPARE %s
|
|
|
|
; Test case to make sure loop-rotate avoids rotating during the prepare-for-lto
|
|
; stage, when the header contains a call which may be inlined during the LTO stage.
|
|
define void @test_prepare_for_lto() {
|
|
; FULL-LABEL: @test_prepare_for_lto(
|
|
; FULL-NEXT: entry:
|
|
; FULL-NEXT: %array = alloca [20 x i32], align 16
|
|
; FULL-NEXT: %arrayidx = getelementptr inbounds [20 x i32], [20 x i32]* %array, i64 0, i64 0
|
|
; FULL-NEXT: call void @may_be_inlined()
|
|
; FULL-NEXT: br label %for.body
|
|
;
|
|
; PREPARE-LABEL: @test_prepare_for_lto(
|
|
; PREPARE-NEXT: entry:
|
|
; PREPARE-NEXT: %array = alloca [20 x i32], align 16
|
|
; PREPARE-NEXT: br label %for.cond
|
|
;
|
|
entry:
|
|
%array = alloca [20 x i32], align 16
|
|
br label %for.cond
|
|
|
|
for.cond: ; preds = %for.body, %entry
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
|
|
%cmp = icmp slt i32 %i.0, 100
|
|
%arrayidx = getelementptr inbounds [20 x i32], [20 x i32]* %array, i64 0, i64 0
|
|
call void @may_be_inlined()
|
|
br i1 %cmp, label %for.body, label %for.end
|
|
|
|
for.body: ; preds = %for.cond
|
|
store i32 0, i32* %arrayidx, align 16
|
|
%inc = add nsw i32 %i.0, 1
|
|
br label %for.cond
|
|
|
|
for.end: ; preds = %for.cond
|
|
ret void
|
|
}
|
|
|
|
define void @may_be_inlined() {
|
|
ret void
|
|
}
|
|
|
|
; Intrinsics, like @llvm.dbg.value are never inlined and should not block loop
|
|
; rotation, even when preparing for LTO.
|
|
define void @test_prepare_for_lto_intrinsic() !dbg !7 {
|
|
; FULL-LABEL: @test_prepare_for_lto_intrinsic(
|
|
; FULL-NEXT: entry:
|
|
; FULL-NEXT: %array = alloca [20 x i32], align 16
|
|
; FULL-NEXT: call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !DIExpression()), !dbg !13
|
|
; FULL-NEXT: %arrayidx = getelementptr inbounds [20 x i32], [20 x i32]* %array, i64 0, i64 0
|
|
; FULL-NEXT: br label %for.body
|
|
;
|
|
; PREPARE-LABEL: @test_prepare_for_lto_intrinsic(
|
|
; PREPARE-NEXT: entry:
|
|
; PREPARE-NEXT: %array = alloca [20 x i32], align 16
|
|
; PREPARE-NEXT: call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !DIExpression()), !dbg !13
|
|
; PREPARE-NEXT: %arrayidx = getelementptr inbounds [20 x i32], [20 x i32]* %array, i64 0, i64 0
|
|
; PREPARE-NEXT: br label %for.body
|
|
;
|
|
entry:
|
|
%array = alloca [20 x i32], align 16
|
|
br label %for.cond
|
|
|
|
for.cond: ; preds = %for.body, %entry
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
|
|
call void @llvm.dbg.value(metadata i32 %i.0, metadata !12, metadata !DIExpression()), !dbg !13
|
|
%cmp = icmp slt i32 %i.0, 100
|
|
%arrayidx = getelementptr inbounds [20 x i32], [20 x i32]* %array, i64 0, i64 0
|
|
br i1 %cmp, label %for.body, label %for.end
|
|
|
|
for.body: ; preds = %for.cond
|
|
store i32 0, i32* %arrayidx, align 16
|
|
%inc = add nsw i32 %i.0, 1
|
|
br label %for.cond
|
|
|
|
for.end: ; preds = %for.cond
|
|
ret void
|
|
}
|
|
|
|
declare void @llvm.dbg.value(metadata, metadata, metadata) #2
|
|
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!3, !4, !5, !6}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
|
|
!1 = !DIFile(filename: "test.c", directory: "/tmp")
|
|
!2 = !{}
|
|
!3 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!4 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!5 = !{i32 1, !"wchar_size", i32 4}
|
|
!6 = !{i32 7, !"PIC Level", i32 2}
|
|
!7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
|
|
!8 = !DISubroutineType(types: !9)
|
|
!9 = !{null, !10}
|
|
!10 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)
|
|
!11 = !{!12}
|
|
!12 = !DILocalVariable(name: "input", arg: 1, scope: !7, file: !1, line: 2, type: !10)
|
|
!13 = !DILocation(line: 2, column: 15, scope: !7)
|