| ; RUN: opt < %s -lcssa -S | FileCheck %s |
| ; RUN: opt < %s -passes=lcssa -S | FileCheck %s |
| ; RUN: opt < %s -debugify -lcssa -S | FileCheck -check-prefix=DEBUGIFY %s |
| |
| define void @lcssa(i1 %S2) { |
| ; CHECK-LABEL: @lcssa |
| entry: |
| br label %loop.interior |
| loop.interior: ; preds = %post.if, %entry |
| br i1 %S2, label %if.true, label %if.false |
| if.true: ; preds = %loop.interior |
| %X1 = add i32 0, 0 ; <i32> [#uses=1] |
| br label %post.if |
| if.false: ; preds = %loop.interior |
| %X2 = add i32 0, 1 ; <i32> [#uses=1] |
| br label %post.if |
| post.if: ; preds = %if.false, %if.true |
| %X3 = phi i32 [ %X1, %if.true ], [ %X2, %if.false ] ; <i32> [#uses=1] |
| br i1 %S2, label %loop.exit, label %loop.interior |
| loop.exit: ; preds = %post.if |
| ; CHECK: %X3.lcssa = phi i32 |
| ; DEBUGIFY: %X3.lcssa = phi i32 {{.*}}, !dbg ![[DbgLoc:[0-9]+]] |
| ; DEBUGIFY-NEXT: call void @llvm.dbg.value(metadata i32 %X3.lcssa |
| ; CHECK: %X4 = add i32 3, %X3.lcssa |
| %X4 = add i32 3, %X3 ; <i32> [#uses=0] |
| ret void |
| } |
| |
| ; Make sure the lcssa phi has %X3's debug location |
| ; DEBUGIFY: ![[DbgLoc]] = !DILocation(line: 7 |