91 lines
2.7 KiB
LLVM
91 lines
2.7 KiB
LLVM
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; RUN: opt < %s -codegenprepare -S | FileCheck %s
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; RUN: llc < %s | FileCheck --check-prefix=ASM1 %s
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; RUN: llc < %s -function-sections | FileCheck --check-prefix=ASM2 %s
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target triple = "x86_64-pc-linux-gnu"
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; This tests that hot/cold functions get correct section prefix assigned
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; CHECK: hot_func1{{.*}}!section_prefix ![[HOT_ID:[0-9]+]]
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; ASM1: .section .text.hot.,"ax",@progbits
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; ASM2: .section .text.hot.hot_func1,"ax",@progbits
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; The entry is hot
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define void @hot_func1() !prof !15 {
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ret void
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}
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; CHECK: hot_func2{{.*}}!section_prefix ![[HOT_ID:[0-9]+]]
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; Entry is cold but inner block is hot
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define void @hot_func2(i32 %n) !prof !16 {
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entry:
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%n.addr = alloca i32, align 4
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%i = alloca i32, align 4
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store i32 %n, i32* %n.addr, align 4
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store i32 0, i32* %i, align 4
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br label %for.cond
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for.cond:
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%0 = load i32, i32* %i, align 4
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%1 = load i32, i32* %n.addr, align 4
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%cmp = icmp slt i32 %0, %1
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br i1 %cmp, label %for.body, label %for.end, !prof !19
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for.body:
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%2 = load i32, i32* %i, align 4
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%inc = add nsw i32 %2, 1
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store i32 %inc, i32* %i, align 4
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br label %for.cond
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for.end:
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ret void
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}
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; For instrumentation based PGO, we should only look at block counts,
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; not call site VP metadata (which can exist on value profiled memcpy,
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; or possibly left behind after static analysis based devirtualization).
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; CHECK: cold_func1{{.*}}!section_prefix ![[COLD_ID:[0-9]+]]
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; ASM1: .section .text.unlikely.,"ax",@progbits
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; ASM2: .section .text.unlikely.cold_func1,"ax",@progbits
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define void @cold_func1() !prof !16 {
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call void @hot_func1(), !prof !17
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call void @hot_func1(), !prof !17
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ret void
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}
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; CHECK: cold_func2{{.*}}!section_prefix ![[COLD_ID]]
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define void @cold_func2() !prof !16 {
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call void @hot_func1(), !prof !17
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call void @hot_func1(), !prof !18
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call void @hot_func1(), !prof !18
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ret void
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}
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; CHECK: cold_func3{{.*}}!section_prefix ![[COLD_ID]]
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define void @cold_func3() !prof !16 {
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call void @hot_func1(), !prof !18
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ret void
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}
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; CHECK: ![[HOT_ID]] = !{!"function_section_prefix", !"hot"}
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; CHECK: ![[COLD_ID]] = !{!"function_section_prefix", !"unlikely"}
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!llvm.module.flags = !{!1}
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!1 = !{i32 1, !"ProfileSummary", !2}
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!2 = !{!3, !4, !5, !6, !7, !8, !9, !10}
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!3 = !{!"ProfileFormat", !"InstrProf"}
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!4 = !{!"TotalCount", i64 10000}
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!5 = !{!"MaxCount", i64 1000}
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!6 = !{!"MaxInternalCount", i64 1}
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!7 = !{!"MaxFunctionCount", i64 1000}
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!8 = !{!"NumCounts", i64 3}
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!9 = !{!"NumFunctions", i64 3}
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!10 = !{!"DetailedSummary", !11}
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!11 = !{!12, !13, !14}
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!12 = !{i32 10000, i64 100, i32 1}
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!13 = !{i32 999000, i64 100, i32 1}
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!14 = !{i32 999999, i64 1, i32 2}
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!15 = !{!"function_entry_count", i64 1000}
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!16 = !{!"function_entry_count", i64 1}
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!17 = !{!"branch_weights", i32 80}
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!18 = !{!"branch_weights", i32 1}
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!19 = !{!"branch_weights", i32 1000, i32 1}
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