derek.holloway
7502bf64a4
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131 lines
2.9 KiB
LLVM
131 lines
2.9 KiB
LLVM
; RUN: opt -S -passes=inline %s -debug-only=inline-cost -min-jump-table-entries=4 --disable-output 2>&1 | FileCheck %s -check-prefix=LOOKUPTABLE -match-full-lines
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; RUN: opt -S -passes=inline %s -debug-only=inline-cost -min-jump-table-entries=5 --disable-output 2>&1 | FileCheck %s -check-prefix=SWITCH -match-full-lines
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; REQUIRES: x86_64-linux, asserts
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i64 @main(i64 %a) {
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%b = call i64 @small_switch_default(i64 %a)
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%c = call i64 @small_switch_no_default(i64 %a)
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%d = call i64 @lookup_table_default(i64 %a)
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%e = call i64 @lookup_table_no_default(i64 %a)
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ret i64 %b
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}
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; SWITCH-LABEL: Analyzing call of small_switch_default{{.*}}
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; SWITCH: Cost: 0
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define i64 @small_switch_default(i64 %a) {
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switch i64 %a, label %default_branch [
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i64 -1, label %branch_0
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i64 8, label %branch_1
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i64 52, label %branch_2
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]
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branch_0:
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br label %exit
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branch_1:
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br label %exit
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branch_2:
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br label %exit
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default_branch:
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br label %exit
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exit:
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%b = phi i64 [ 5, %branch_0 ], [ 9, %branch_1 ], [ 2, %branch_2 ], [ 3, %default_branch ]
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ret i64 %b
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}
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; SWITCH-LABEL: Analyzing call of small_switch_no_default{{.*}}
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; SWITCH: Cost: -10
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define i64 @small_switch_no_default(i64 %a) {
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switch i64 %a, label %unreachabledefault [
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i64 -1, label %branch_0
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i64 8, label %branch_1
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i64 52, label %branch_2
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]
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branch_0:
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br label %exit
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branch_1:
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br label %exit
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branch_2:
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br label %exit
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unreachabledefault:
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unreachable
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exit:
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%b = phi i64 [ 5, %branch_0 ], [ 9, %branch_1 ], [ 2, %branch_2 ]
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ret i64 %b
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}
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; LOOKUPTABLE-LABEL: Analyzing call of lookup_table_default{{.*}}
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; LOOKUPTABLE: Cost: 10
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; SWITCH-LABEL: Analyzing call of lookup_table_default{{.*}}
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; SWITCH: Cost: 20
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define i64 @lookup_table_default(i64 %a) {
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switch i64 %a, label %default_branch [
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i64 0, label %branch_0
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i64 1, label %branch_1
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i64 2, label %branch_2
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i64 3, label %branch_3
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]
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branch_0:
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br label %exit
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branch_1:
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br label %exit
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branch_2:
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br label %exit
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branch_3:
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br label %exit
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default_branch:
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br label %exit
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exit:
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%b = phi i64 [ 5, %branch_0 ], [ 9, %branch_1 ], [ 2, %branch_2 ], [ 7, %branch_3 ], [ 3, %default_branch ]
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ret i64 %b
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}
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; LOOKUPTABLE-LABEL: Analyzing call of lookup_table_no_default{{.*}}
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; LOOKUPTABLE: Cost: 0
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; SWITCH-LABEL: Analyzing call of lookup_table_no_default{{.*}}
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; SWITCH: Cost: 20
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define i64 @lookup_table_no_default(i64 %a) {
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switch i64 %a, label %unreachabledefault [
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i64 0, label %branch_0
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i64 1, label %branch_1
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i64 2, label %branch_2
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i64 3, label %branch_3
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]
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branch_0:
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br label %exit
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branch_1:
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br label %exit
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branch_2:
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br label %exit
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branch_3:
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br label %exit
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unreachabledefault:
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unreachable
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exit:
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%b = phi i64 [ 5, %branch_0 ], [ 9, %branch_1 ], [ 2, %branch_2 ], [ 7, %branch_3 ]
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ret i64 %b
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}
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