| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -passes=gvn -S | FileCheck %s |
| |
| ; This test checks that we don't hang trying to split a critical edge in scalar |
| ; PRE when the control flow uses a callbr instruction. |
| |
| define void @wombat(i64 %arg, ptr %arg1, i64 %arg2, ptr %arg3) { |
| ; CHECK-LABEL: @wombat( |
| ; CHECK-NEXT: bb: |
| ; CHECK-NEXT: [[TMP5:%.*]] = or i64 [[ARG2:%.*]], [[ARG:%.*]] |
| ; CHECK-NEXT: callbr void asm sideeffect "", "!i,!i"() |
| ; CHECK-NEXT: to label [[BB6:%.*]] [label [[BB7:%.*]], label %bb.bb9_crit_edge] |
| ; CHECK: bb.bb9_crit_edge: |
| ; CHECK-NEXT: [[DOTPRE:%.*]] = trunc i64 [[TMP5]] to i32 |
| ; CHECK-NEXT: br label [[BB9:%.*]] |
| ; CHECK: bb6: |
| ; CHECK-NEXT: br label [[BB7]] |
| ; CHECK: bb7: |
| ; CHECK-NEXT: [[TMP8:%.*]] = trunc i64 [[TMP5]] to i32 |
| ; CHECK-NEXT: tail call void @barney(i32 [[TMP8]]) |
| ; CHECK-NEXT: br label [[BB9]] |
| ; CHECK: bb9: |
| ; CHECK-NEXT: [[TMP10_PRE_PHI:%.*]] = phi i32 [ [[DOTPRE]], [[BB_BB9_CRIT_EDGE:%.*]] ], [ [[TMP8]], [[BB7]] ] |
| ; CHECK-NEXT: store i32 [[TMP10_PRE_PHI]], ptr [[ARG3:%.*]], align 4 |
| ; CHECK-NEXT: ret void |
| ; |
| bb: |
| %tmp5 = or i64 %arg2, %arg |
| callbr void asm sideeffect "", "!i,!i"() |
| to label %bb6 [label %bb7, label %bb9] |
| |
| bb6: ; preds = %bb |
| br label %bb7 |
| |
| bb7: ; preds = %bb6, %bb |
| %tmp8 = trunc i64 %tmp5 to i32 |
| tail call void @barney(i32 %tmp8) |
| br label %bb9 |
| |
| bb9: ; preds = %bb7, %bb |
| %tmp10 = trunc i64 %tmp5 to i32 |
| store i32 %tmp10, ptr %arg3 |
| ret void |
| } |
| |
| declare void @barney(i32) |
