d26df32255
Allow a duplicate basic block with multiple predecessors to the jump table to be simplified, by considering that the same basic block may appear in more switch cases.
202 lines
5.7 KiB
LLVM
202 lines
5.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S \
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; RUN: | FileCheck %s -check-prefix=SIMPLIFY-CFG
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define i32 @switch_all_duplicate_arms(i32 %0, i32 %1, i32 %2, i32 %3) {
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; SIMPLIFY-CFG-LABEL: define i32 @switch_all_duplicate_arms(
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; SIMPLIFY-CFG-SAME: i32 [[TMP0:%.*]], i32 [[TMP1:%.*]], i32 [[TMP2:%.*]], i32 [[TMP3:%.*]]) {
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; SIMPLIFY-CFG-NEXT: switch i32 [[TMP1]], label %[[BB6:.*]] [
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; SIMPLIFY-CFG-NEXT: i32 0, label %[[BB5:.*]]
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; SIMPLIFY-CFG-NEXT: i32 1, label %[[BB5]]
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; SIMPLIFY-CFG-NEXT: ]
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; SIMPLIFY-CFG: [[BB5]]:
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; SIMPLIFY-CFG-NEXT: br label %[[BB6]]
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; SIMPLIFY-CFG: [[BB6]]:
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; SIMPLIFY-CFG-NEXT: [[TMP8:%.*]] = phi i32 [ [[TMP3]], [[TMP4:%.*]] ], [ [[TMP2]], %[[BB5]] ]
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; SIMPLIFY-CFG-NEXT: ret i32 [[TMP8]]
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;
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switch i32 %1, label %7 [
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i32 0, label %5
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i32 1, label %6
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]
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5:
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br label %7
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6:
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br label %7
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7:
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%8 = phi i32 [ %3, %4 ], [ %2, %6 ], [ %2, %5 ]
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ret i32 %8
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}
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define i32 @switch_some_duplicate_arms(i32 %0, i32 %1, i32 %2, i32 %3, i32 %4) {
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; SIMPLIFY-CFG-LABEL: define i32 @switch_some_duplicate_arms(
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; SIMPLIFY-CFG-SAME: i32 [[TMP0:%.*]], i32 [[TMP1:%.*]], i32 [[TMP2:%.*]], i32 [[TMP3:%.*]], i32 [[TMP4:%.*]]) {
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; SIMPLIFY-CFG-NEXT: switch i32 [[TMP1]], label %[[BB8:.*]] [
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; SIMPLIFY-CFG-NEXT: i32 0, label %[[BB6:.*]]
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; SIMPLIFY-CFG-NEXT: i32 1, label %[[BB6]]
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; SIMPLIFY-CFG-NEXT: i32 2, label %[[BB7:.*]]
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; SIMPLIFY-CFG-NEXT: ]
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; SIMPLIFY-CFG: [[BB6]]:
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; SIMPLIFY-CFG-NEXT: br label %[[BB8]]
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; SIMPLIFY-CFG: [[BB7]]:
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; SIMPLIFY-CFG-NEXT: br label %[[BB8]]
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; SIMPLIFY-CFG: [[BB8]]:
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; SIMPLIFY-CFG-NEXT: [[TMP10:%.*]] = phi i32 [ [[TMP3]], [[TMP5:%.*]] ], [ [[TMP4]], %[[BB7]] ], [ [[TMP2]], %[[BB6]] ]
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; SIMPLIFY-CFG-NEXT: ret i32 [[TMP10]]
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;
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switch i32 %1, label %9 [
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i32 0, label %6
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i32 1, label %7
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i32 2, label %8
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]
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6:
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br label %9
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7:
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br label %9
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8:
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br label %9
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9:
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%10 = phi i32 [ %3, %5 ], [ %4, %8 ], [ %2, %7 ], [ %2, %6 ]
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ret i32 %10
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}
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define i32 @switch_duplicate_arms_multipred(i1 %0, i32 %1, i32 %2, i32 %3, i32 %4) {
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; SIMPLIFY-CFG-LABEL: define i32 @switch_duplicate_arms_multipred(
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; SIMPLIFY-CFG-SAME: i1 [[TMP0:%.*]], i32 [[TMP1:%.*]], i32 [[TMP2:%.*]], i32 [[TMP3:%.*]], i32 [[TMP4:%.*]]) {
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; SIMPLIFY-CFG-NEXT: br i1 [[TMP0]], label %[[BB6:.*]], label %[[BB7:.*]]
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; SIMPLIFY-CFG: [[BB6]]:
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; SIMPLIFY-CFG-NEXT: switch i32 [[TMP2]], label %[[BB9:.*]] [
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; SIMPLIFY-CFG-NEXT: i32 0, label %[[BB7]]
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; SIMPLIFY-CFG-NEXT: i32 1, label %[[BB8:.*]]
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; SIMPLIFY-CFG-NEXT: ]
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; SIMPLIFY-CFG: [[BB7]]:
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; SIMPLIFY-CFG-NEXT: br label %[[BB9]]
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; SIMPLIFY-CFG: [[BB8]]:
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; SIMPLIFY-CFG-NEXT: br label %[[BB9]]
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; SIMPLIFY-CFG: [[BB9]]:
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; SIMPLIFY-CFG-NEXT: [[TMP10:%.*]] = phi i32 [ [[TMP4]], %[[BB6]] ], [ [[TMP3]], %[[BB8]] ], [ [[TMP3]], %[[BB7]] ]
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; SIMPLIFY-CFG-NEXT: ret i32 [[TMP10]]
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;
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br i1 %0, label %6, label %7
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6:
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switch i32 %2, label %9 [
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i32 0, label %7
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i32 1, label %8
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]
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7:
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br label %9
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8:
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br label %9
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9:
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%10 = phi i32 [ %4, %6 ], [ %3, %8 ], [ %3, %7 ]
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ret i32 %10
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}
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define i32 @switch_dup_default(i32 %0, i32 %1, i32 %2, i32 %3) {
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; SIMPLIFY-CFG-LABEL: define i32 @switch_dup_default(
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; SIMPLIFY-CFG-SAME: i32 [[TMP0:%.*]], i32 [[TMP1:%.*]], i32 [[TMP2:%.*]], i32 [[TMP3:%.*]]) {
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; SIMPLIFY-CFG-NEXT: [[COND:%.*]] = icmp eq i32 [[TMP1]], 0
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; SIMPLIFY-CFG-NEXT: [[TMP8:%.*]] = select i1 [[COND]], i32 [[TMP3]], i32 [[TMP2]]
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; SIMPLIFY-CFG-NEXT: ret i32 [[TMP8]]
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;
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switch i32 %1, label %7 [
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i32 0, label %5
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i32 1, label %6
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]
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5:
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br label %8
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6:
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br label %8
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7:
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br label %8
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8:
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%9 = phi i32 [ %3, %5 ], [ %2, %6 ], [ %2, %7 ]
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ret i32 %9
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}
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define i32 @switch_dup_exit(i32 %val) {
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; SIMPLIFY-CFG-LABEL: define i32 @switch_dup_exit(
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; SIMPLIFY-CFG-SAME: i32 [[VAL:%.*]]) {
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; SIMPLIFY-CFG-NEXT: [[ENTRY:.*]]:
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; SIMPLIFY-CFG-NEXT: switch i32 [[VAL]], label %[[DEFAULT:.*]] [
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; SIMPLIFY-CFG-NEXT: i32 1, label %[[EXIT:.*]]
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; SIMPLIFY-CFG-NEXT: i32 11, label %[[EXIT]]
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; SIMPLIFY-CFG-NEXT: i32 22, label %[[BB1:.*]]
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; SIMPLIFY-CFG-NEXT: ]
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; SIMPLIFY-CFG: [[BB1]]:
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; SIMPLIFY-CFG-NEXT: br label %[[EXIT]]
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; SIMPLIFY-CFG: [[DEFAULT]]:
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; SIMPLIFY-CFG-NEXT: br label %[[EXIT]]
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; SIMPLIFY-CFG: [[EXIT]]:
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; SIMPLIFY-CFG-NEXT: [[RET:%.*]] = phi i32 [ 0, %[[DEFAULT]] ], [ 3, %[[BB1]] ], [ 1, %[[ENTRY]] ], [ 1, %[[ENTRY]] ]
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; SIMPLIFY-CFG-NEXT: ret i32 [[RET]]
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;
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entry:
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switch i32 %val, label %default [
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i32 1, label %exit
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i32 11, label %exit
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i32 22, label %bb1
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i32 15, label %bb2
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i32 0, label %bb2
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]
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bb1:
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br label %exit
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bb2:
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br label %exit
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default:
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br label %exit
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exit:
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%ret = phi i32 [ 0, %default ], [ 0, %bb2 ], [ 3, %bb1 ], [ 1, %entry ], [ 1, %entry ]
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ret i32 %ret
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}
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define i64 @switch_dup_exit_2(i32 %val) {
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; SIMPLIFY-CFG-LABEL: define i64 @switch_dup_exit_2(
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; SIMPLIFY-CFG-SAME: i32 [[VAL:%.*]]) {
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; SIMPLIFY-CFG-NEXT: [[ENTRY:.*:]]
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; SIMPLIFY-CFG-NEXT: [[SWITCH_SELECTCMP_CASE1:%.*]] = icmp eq i32 [[VAL]], 1
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; SIMPLIFY-CFG-NEXT: [[SWITCH_SELECTCMP_CASE2:%.*]] = icmp eq i32 [[VAL]], 11
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; SIMPLIFY-CFG-NEXT: [[SWITCH_SELECTCMP:%.*]] = or i1 [[SWITCH_SELECTCMP_CASE1]], [[SWITCH_SELECTCMP_CASE2]]
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; SIMPLIFY-CFG-NEXT: [[RET:%.*]] = select i1 [[SWITCH_SELECTCMP]], i64 1, i64 0
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; SIMPLIFY-CFG-NEXT: ret i64 [[RET]]
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;
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entry:
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switch i32 %val, label %default [
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i32 1, label %bb2
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i32 11, label %exit
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i32 13, label %bb1
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i32 0, label %bb1
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]
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bb1:
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br label %exit
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bb2:
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br label %exit
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default:
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br label %exit
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exit:
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%ret = phi i64 [ 0, %default ], [ 0, %bb1 ], [ 1, %entry ], [ 1, %bb2 ]
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ret i64 %ret
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}
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