| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -tut-simplifycfg -tut-simplifycfg-version=v1 -enable-new-pm=0 -S < %s | FileCheck %s |
| ; RUN: opt -tut-simplifycfg -tut-simplifycfg-version=v2 -enable-new-pm=0 -S < %s | FileCheck %s |
| ; RUN: opt -tut-simplifycfg -tut-simplifycfg-version=v3 -enable-new-pm=0 -S < %s | FileCheck %s |
| |
| define i32 @phi_cond_branch_eliminated() { |
| ; CHECK-LABEL: @phi_cond_branch_eliminated( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: ret i32 20 |
| ; |
| entry: |
| br i1 true, label %bb.2, label %bb.3 |
| |
| bb.2: |
| br label %bb.3 |
| |
| bb.3: |
| %ret = phi i32 [ 10, %entry ], [ 20, %bb.2 ] |
| ret i32 %ret |
| } |
| |
| define i32 @phi_removed() { |
| ; CHECK-LABEL: @phi_removed( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[BB_3:%.*]] |
| ; CHECK: bb.3: |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| entry: |
| br i1 false, label %bb.2, label %bb.3 |
| |
| bb.2: |
| %pv = phi i32 [ 10, %entry ] |
| br label %bb.3 |
| |
| bb.3: |
| ret i32 0 |
| } |
| |
| define i32 @phi_in_dead_region() { |
| ; CHECK-LABEL: @phi_in_dead_region( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: ret i32 1 |
| ; |
| entry: |
| ret i32 1 |
| |
| bb.1: |
| br i1 true, label %bb.2, label %bb.3 |
| |
| bb.2: |
| br label %bb.3 |
| |
| bb.3: |
| %ret = phi i32 [ 10, %bb.1 ], [ 20, %bb.2 ] |
| ret i32 %ret |
| } |
| |
| define i32 @phi_in_mergable_blocks() { |
| ; CHECK-LABEL: @phi_in_mergable_blocks( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: ret i32 10 |
| ; |
| entry: |
| br label %bb.1 |
| |
| bb.1: |
| %pv = phi i32 [ 10, %entry ] |
| ret i32 %pv |
| } |