| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -instcombine -S < %s | FileCheck %s |
| ; RUN: opt -passes=instcombine -S < %s | FileCheck %s |
| |
| ; Check that we fold the condition of branches of the |
| ; form: br <condition> dest1, dest2, where dest1 == dest2. |
| define i32 @test(i32 %x) { |
| ; CHECK-LABEL: @test( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br i1 false, label [[MERGE:%.*]], label [[MERGE]] |
| ; CHECK: merge: |
| ; CHECK-NEXT: ret i32 [[X:%.*]] |
| ; |
| entry: |
| %cmp = icmp ult i32 %x, 7 |
| br i1 %cmp, label %merge, label %merge |
| merge: |
| ret i32 %x |
| } |
| |
| @global = global i8 0 |
| |
| define i32 @pat(i32 %x) { |
| ; CHECK-LABEL: @pat( |
| ; CHECK-NEXT: br i1 false, label [[PATATINO:%.*]], label [[PATATINO]] |
| ; CHECK: patatino: |
| ; CHECK-NEXT: ret i32 [[X:%.*]] |
| ; |
| %y = icmp eq i32 27, ptrtoint(i8* @global to i32) |
| br i1 %y, label %patatino, label %patatino |
| patatino: |
| ret i32 %x |
| } |
| |
| define i1 @test01(i1 %cond) { |
| ; CHECK-LABEL: @test01( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_TRUE_1:%.*]], label [[IF_FALSE_1:%.*]] |
| ; CHECK: if.true.1: |
| ; CHECK-NEXT: br label [[MERGE_1:%.*]] |
| ; CHECK: if.false.1: |
| ; CHECK-NEXT: br label [[MERGE_1]] |
| ; CHECK: merge.1: |
| ; CHECK-NEXT: br i1 [[COND]], label [[IF_TRUE_2:%.*]], label [[IF_FALSE_2:%.*]] |
| ; CHECK: if.true.2: |
| ; CHECK-NEXT: br label [[MERGE_2:%.*]] |
| ; CHECK: if.false.2: |
| ; CHECK-NEXT: br label [[MERGE_2]] |
| ; CHECK: merge.2: |
| ; CHECK-NEXT: ret i1 [[COND]] |
| ; |
| entry: |
| br i1 %cond, label %if.true.1, label %if.false.1 |
| |
| if.true.1: |
| br label %merge.1 |
| |
| if.false.1: |
| br label %merge.1 |
| |
| merge.1: |
| %merge.cond.1 = phi i1 [true, %if.true.1], [false, %if.false.1] |
| br i1 %merge.cond.1, label %if.true.2, label %if.false.2 |
| |
| if.true.2: |
| br label %merge.2 |
| |
| if.false.2: |
| br label %merge.2 |
| |
| merge.2: |
| %merge.cond.2 = phi i1 [true, %if.true.2], [false, %if.false.2] |
| ret i1 %merge.cond.2 |
| } |
| |
| define i1 @test02(i1 %cond) { |
| ; CHECK-LABEL: @test02( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_TRUE_1:%.*]], label [[IF_FALSE_1:%.*]] |
| ; CHECK: if.true.1: |
| ; CHECK-NEXT: br label [[MERGE_1:%.*]] |
| ; CHECK: if.false.1: |
| ; CHECK-NEXT: br label [[MERGE_1]] |
| ; CHECK: merge.1: |
| ; CHECK-NEXT: br i1 [[COND]], label [[IF_FALSE_2:%.*]], label [[IF_TRUE_2:%.*]] |
| ; CHECK: if.true.2: |
| ; CHECK-NEXT: br label [[MERGE_2:%.*]] |
| ; CHECK: if.false.2: |
| ; CHECK-NEXT: br label [[MERGE_2]] |
| ; CHECK: merge.2: |
| ; CHECK-NEXT: ret i1 [[COND]] |
| ; |
| entry: |
| br i1 %cond, label %if.true.1, label %if.false.1 |
| |
| if.true.1: |
| br label %merge.1 |
| |
| if.false.1: |
| br label %merge.1 |
| |
| merge.1: |
| %merge.cond.1 = phi i1 [false, %if.true.1], [true, %if.false.1] |
| br i1 %merge.cond.1, label %if.true.2, label %if.false.2 |
| |
| if.true.2: |
| br label %merge.2 |
| |
| if.false.2: |
| br label %merge.2 |
| |
| merge.2: |
| %merge.cond.2 = phi i1 [false, %if.true.2], [true, %if.false.2] |
| ret i1 %merge.cond.2 |
| } |