derek.holloway
7502bf64a4
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37 lines
1.2 KiB
LLVM
37 lines
1.2 KiB
LLVM
; RUN: llvm-profdata merge %S/Inputs/select2.proftext -o %t.profdata
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; RUN: opt < %s -passes=pgo-instr-use -pgo-test-profile-file=%t.profdata -pgo-instr-select=true -S | FileCheck %s --check-prefix=USE
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i32 @foo(i32 %n) {
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;USE: define i32 @foo(i32 %n) !prof ![[ENTRY_COUNT:[0-9]+]] {
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entry:
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br label %for.cond
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for.cond:
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%sum.0 = phi i32 [ 0, %entry ], [ %add, %for.inc ]
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%cmp = icmp slt i32 %i.0, %n
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br i1 %cmp, label %for.body, label %for.end
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;USE: br i1 %cmp, label %for.body, label %for.end, !prof ![[BW_FOR_BR:[0-9]+]]
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for.body:
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%cmp1 = icmp sgt i32 %sum.0, 10
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%cond = select i1 %cmp1, i32 20, i32 -10
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;USE: %cond = select i1 %cmp1, i32 20, i32 -10, !prof ![[BW_FOR_SELECT:[0-9]+]]
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%add = add nsw i32 %sum.0, %cond
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br label %for.inc
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for.inc:
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%inc = add nsw i32 %i.0, 1
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br label %for.cond
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for.end:
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ret i32 %sum.0
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}
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;USE: ![[ENTRY_COUNT]] = !{!"function_entry_count", i64 3}
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;USE: ![[BW_FOR_BR]] = !{!"branch_weights", i32 800, i32 3}
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;USE: ![[BW_FOR_SELECT]] = !{!"branch_weights", i32 300, i32 500}
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