| ; RUN: opt -S -passes=newgvn %s | FileCheck %s |
| |
| ; CHECK: define i32 @main() { |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: %tmp = load i32, ptr @d, align 4 |
| ; CHECK-NEXT: %tmp1 = load i32, ptr @c, align 4 |
| ; CHECK-NEXT: %tobool = icmp eq i32 %tmp1, -1 |
| ; CHECK-NEXT: br i1 %tobool, label %if.end, label %if.then |
| ; CHECK: if.then: |
| ; CHECK-NEXT: br label %L |
| ; CHECK: L: |
| ; CHECK-NEXT: %e.0 = phi i32 [ 0, %if.then ], [ %e.1, %if.then4 ] |
| ; CHECK-NEXT: br label %if.end |
| ; CHECK: if.end: |
| ; CHECK-NEXT: %e.1 = phi i32 [ %e.0, %L ], [ %tmp, %entry ] |
| ; CHECK-NEXT: store i32 %e.1, ptr @a, align 4 |
| ; CHECK-NEXT: %tmp2 = load i32, ptr @b, align 4 |
| ; CHECK-NEXT: store i32 0, ptr @b, align 4 |
| ; CHECK-NEXT: %sext = shl i32 %tmp2, 16 |
| ; CHECK-NEXT: %conv1 = ashr exact i32 %sext, 16 |
| ; CHECK-NEXT: %add = add nsw i32 %conv1, %tmp1 |
| ; CHECK-NEXT: %add2 = add nsw i32 %add, %e.1 |
| ; CHECK-NEXT: store i32 %add2, ptr @a, align 4 |
| ; CHECK-NEXT: %tobool3 = icmp eq i32 %add2, 0 |
| ; CHECK-NEXT: br i1 %tobool3, label %if.end5, label %if.then4 |
| ; CHECK: if.then4: |
| ; CHECK-NEXT: br label %L |
| ; CHECK: if.end5: |
| ; CHECK-NEXT: ret i32 0 |
| ; CHECK-NEXT: } |
| |
| @d = global i32 1, align 4 |
| @c = common global i32 0, align 4 |
| @a = common global i32 0, align 4 |
| @b = common global i32 0, align 4 |
| |
| define i32 @main() { |
| entry: |
| %tmp = load i32, ptr @d, align 4 |
| %tmp1 = load i32, ptr @c, align 4 |
| %tobool = icmp eq i32 %tmp1, -1 |
| br i1 %tobool, label %if.end, label %if.then |
| |
| if.then: ; preds = %entry |
| br label %L |
| |
| L: ; preds = %if.then4, %if.then |
| %e.0 = phi i32 [ 0, %if.then ], [ %e.1, %if.then4 ] |
| br label %if.end |
| |
| if.end: ; preds = %L, %entry |
| %e.1 = phi i32 [ %e.0, %L ], [ %tmp, %entry ] |
| store i32 %e.1, ptr @a, align 4 |
| %tmp2 = load i32, ptr @b, align 4 |
| store i32 0, ptr @b, align 4 |
| %sext = shl i32 %tmp2, 16 |
| %conv1 = ashr exact i32 %sext, 16 |
| %tmp3 = load i32, ptr @c, align 4 |
| %add = add nsw i32 %conv1, %tmp3 |
| %tmp4 = load i32, ptr @a, align 4 |
| %and = and i32 %tmp4, %e.1 |
| %add2 = add nsw i32 %add, %and |
| store i32 %add2, ptr @a, align 4 |
| %tobool3 = icmp eq i32 %add2, 0 |
| br i1 %tobool3, label %if.end5, label %if.then4 |
| |
| if.then4: ; preds = %if.end |
| br label %L |
| |
| if.end5: ; preds = %if.end |
| ret i32 0 |
| } |