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d32b3c9325
Add an option to allow easier experimentation by target maintainers with the minimum number of entries to create jump tables. Also clarify the name of the other existing option governing the creation of jump tables. Differential revision: https://reviews.llvm.org/D25883 llvm-svn: 285104
80 lines
2.3 KiB
LLVM
80 lines
2.3 KiB
LLVM
; RUN: llc %s -O2 -print-machineinstrs -mtriple=aarch64-linux-gnu -jump-table-density=40 -min-jump-table-entries=0 -o /dev/null 2> %t; FileCheck %s --check-prefixes=CHECK,CHECK0 < %t
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; RUN: llc %s -O2 -print-machineinstrs -mtriple=aarch64-linux-gnu -jump-table-density=40 -min-jump-table-entries=4 -o /dev/null 2> %t; FileCheck %s --check-prefixes=CHECK,CHECK4 < %t
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; RUN: llc %s -O2 -print-machineinstrs -mtriple=aarch64-linux-gnu -jump-table-density=40 -min-jump-table-entries=8 -o /dev/null 2> %t; FileCheck %s --check-prefixes=CHECK,CHECK8 < %t
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declare void @ext(i32)
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define i32 @jt2(i32 %a, i32 %b) {
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entry:
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switch i32 %a, label %return [
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i32 1, label %bb1
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i32 2, label %bb2
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]
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; CHECK-LABEL: function jt2:
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; CHECK0-NEXT: Jump Tables:
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; CHECK0-NEXT: jt#0:
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; CHECK0-NOT: jt#1:
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; CHECK4-NOT: Jump Tables:
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; CHECK8-NOT: Jump Tables:
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bb1: tail call void @ext(i32 0) br label %return
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bb2: tail call void @ext(i32 2) br label %return
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return: ret i32 %b
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}
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define i32 @jt4(i32 %a, i32 %b) {
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entry:
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switch i32 %a, label %return [
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i32 1, label %bb1
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i32 2, label %bb2
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i32 3, label %bb3
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i32 4, label %bb4
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]
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; CHECK-LABEL: function jt4:
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; CHECK0-NEXT: Jump Tables:
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; CHECK0-NEXT: jt#0:
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; CHECK0-NOT: jt#1:
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; CHECK4-NEXT: Jump Tables:
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; CHECK4-NEXT: jt#0:
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; CHECK4-NOT: jt#1:
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; CHECK8-NOT: Jump Tables:
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bb1: tail call void @ext(i32 0) br label %return
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bb2: tail call void @ext(i32 2) br label %return
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bb3: tail call void @ext(i32 4) br label %return
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bb4: tail call void @ext(i32 6) br label %return
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return: ret i32 %b
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}
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define i32 @jt8(i32 %a, i32 %b) {
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entry:
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switch i32 %a, label %return [
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i32 1, label %bb1
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i32 2, label %bb2
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i32 3, label %bb3
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i32 4, label %bb4
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i32 5, label %bb5
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i32 6, label %bb6
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i32 7, label %bb7
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i32 8, label %bb8
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]
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; CHECK-LABEL: function jt8:
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; CHECK-NEXT: Jump Tables:
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; CHECK-NEXT: jt#0:
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; CHECK-NOT: jt#1:
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bb1: tail call void @ext(i32 0) br label %return
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bb2: tail call void @ext(i32 2) br label %return
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bb3: tail call void @ext(i32 4) br label %return
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bb4: tail call void @ext(i32 6) br label %return
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bb5: tail call void @ext(i32 8) br label %return
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bb6: tail call void @ext(i32 10) br label %return
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bb7: tail call void @ext(i32 12) br label %return
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bb8: tail call void @ext(i32 14) br label %return
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return: ret i32 %b
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}
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