472 lines
		
	
	
		
			16 KiB
		
	
	
	
		
			LLVM
		
	
	
	
			
		
		
	
	
			472 lines
		
	
	
		
			16 KiB
		
	
	
	
		
			LLVM
		
	
	
	
| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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| ; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
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| 
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| declare void @use(i1)
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| 
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| ; Make sure conditions in loops are not used to simplify themselves.
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| 
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| define void @loop1(float* %T, float* %x, i32 %points, i32 %trigint) {
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| ; CHECK-LABEL: @loop1(
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| ; CHECK-NEXT:  entry:
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| ; CHECK-NEXT:    [[IDX_EXT:%.*]] = sext i32 [[POINTS:%.*]] to i64
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| ; CHECK-NEXT:    [[ADD_PTR:%.*]] = getelementptr inbounds float, float* [[X:%.*]], i64 [[IDX_EXT]]
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| ; CHECK-NEXT:    [[ADD_PTR1:%.*]] = getelementptr inbounds float, float* [[ADD_PTR]], i64 -8
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| ; CHECK-NEXT:    [[SHR:%.*]] = ashr i32 [[POINTS]], 1
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| ; CHECK-NEXT:    [[IDX_EXT2:%.*]] = sext i32 [[SHR]] to i64
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| ; CHECK-NEXT:    [[ADD_PTR3:%.*]] = getelementptr inbounds float, float* [[X]], i64 [[IDX_EXT2]]
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| ; CHECK-NEXT:    [[ADD_PTR4:%.*]] = getelementptr inbounds float, float* [[ADD_PTR3]], i64 -8
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| ; CHECK-NEXT:    br label [[DO_BODY:%.*]]
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| ; CHECK:       do.body:
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| ; CHECK-NEXT:    [[X2_0:%.*]] = phi float* [ [[ADD_PTR4]], [[ENTRY:%.*]] ], [ [[ADD_PTR106:%.*]], [[DO_BODY]] ]
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| ; CHECK-NEXT:    [[X1_0:%.*]] = phi float* [ [[ADD_PTR1]], [[ENTRY]] ], [ [[ADD_PTR105:%.*]], [[DO_BODY]] ]
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| ; CHECK-NEXT:    [[ADD_PTR105]] = getelementptr inbounds float, float* [[X1_0]], i64 -8
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| ; CHECK-NEXT:    [[ADD_PTR106]] = getelementptr inbounds float, float* [[X2_0]], i64 -8
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| ; CHECK-NEXT:    [[CMP:%.*]] = icmp uge float* [[ADD_PTR106]], [[X]]
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| ; CHECK-NEXT:    br i1 [[CMP]], label [[DO_BODY]], label [[DO_END:%.*]]
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| ; CHECK:       do.end:
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| ; CHECK-NEXT:    ret void
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| ;
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| entry:
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|   %idx.ext = sext i32 %points to i64
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|   %add.ptr = getelementptr inbounds float, float* %x, i64 %idx.ext
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|   %add.ptr1 = getelementptr inbounds float, float* %add.ptr, i64 -8
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|   %shr = ashr i32 %points, 1
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|   %idx.ext2 = sext i32 %shr to i64
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|   %add.ptr3 = getelementptr inbounds float, float* %x, i64 %idx.ext2
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|   %add.ptr4 = getelementptr inbounds float, float* %add.ptr3, i64 -8
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|   br label %do.body
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| 
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| do.body:                                          ; preds = %do.body, %entry
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|   %x2.0 = phi float* [ %add.ptr4, %entry ], [ %add.ptr106, %do.body ]
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|   %x1.0 = phi float* [ %add.ptr1, %entry ], [ %add.ptr105, %do.body ]
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|   %add.ptr105 = getelementptr inbounds float, float* %x1.0, i64 -8
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|   %add.ptr106 = getelementptr inbounds float, float* %x2.0, i64 -8
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|   %cmp = icmp uge float* %add.ptr106, %x
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|   br i1 %cmp, label %do.body, label %do.end
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| 
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| do.end:                                           ; preds = %do.body
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|   ret void
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| }
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| 
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| 
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| ; Some tests with loops with conditions in the header.
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| 
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| define i32 @loop_header_dom(i32 %y, i1 %c) {
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| ; CHECK-LABEL: @loop_header_dom(
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| ; CHECK-NEXT:  entry:
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| ; CHECK-NEXT:    br i1 [[C:%.*]], label [[LOOP_HEADER:%.*]], label [[EXIT:%.*]]
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| ; CHECK:       loop.header:
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| ; CHECK-NEXT:    [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
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| ; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X]], 10
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| ; CHECK-NEXT:    br i1 [[C_1]], label [[LOOP_LATCH]], label [[EXIT]]
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| ; CHECK:       loop.latch:
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| ; CHECK-NEXT:    [[T_1:%.*]] = icmp ule i32 [[X]], 10
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| ; CHECK-NEXT:    call void @use(i1 true)
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| ; CHECK-NEXT:    [[F_1:%.*]] = icmp ugt i32 [[X]], 10
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| ; CHECK-NEXT:    call void @use(i1 false)
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| ; CHECK-NEXT:    [[C_2:%.*]] = icmp ule i32 [[X]], 9
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| ; CHECK-NEXT:    call void @use(i1 [[C_2]])
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| ; CHECK-NEXT:    [[C_3:%.*]] = icmp ugt i32 [[X]], 9
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| ; CHECK-NEXT:    call void @use(i1 [[C_3]])
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| ; CHECK-NEXT:    [[X_NEXT]] = add i32 [[X]], 1
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| ; CHECK-NEXT:    br label [[LOOP_HEADER]]
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| ; CHECK:       exit:
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| ; CHECK-NEXT:    [[C_4:%.*]] = icmp ugt i32 [[Y:%.*]], 10
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| ; CHECK-NEXT:    call void @use(i1 [[C_4]])
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| ; CHECK-NEXT:    ret i32 20
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| ;
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| entry:
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|   br i1 %c, label %loop.header, label %exit
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| 
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| loop.header:
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|   %x = phi i32 [ 0, %entry ], [ %x.next, %loop.latch ]
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|   %c.1 = icmp ule i32 %x, 10
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|   br i1 %c.1, label %loop.latch, label %exit
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| 
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| loop.latch:
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|   %t.1 = icmp ule i32 %x, 10
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|   call void @use(i1 %t.1)
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|   %f.1 = icmp ugt i32 %x, 10
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|   call void @use(i1 %f.1)
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| 
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|   %c.2 = icmp ule i32 %x, 9
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|   call void @use(i1 %c.2)
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|   %c.3 = icmp ugt i32 %x, 9
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|   call void @use(i1 %c.3)
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| 
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|   %x.next = add i32 %x, 1
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|   br label %loop.header
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| 
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| exit:
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|   %c.4 = icmp ugt i32 %y, 10
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|   call void @use(i1 %c.4)
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|   ret i32 20
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| }
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| 
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| define i32 @loop_header_dom_successors_flipped(i32 %y, i1 %c) {
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| ; CHECK-LABEL: @loop_header_dom_successors_flipped(
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| ; CHECK-NEXT:  entry:
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| ; CHECK-NEXT:    br i1 [[C:%.*]], label [[LOOP_HEADER:%.*]], label [[EXIT:%.*]]
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| ; CHECK:       loop.header:
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| ; CHECK-NEXT:    [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
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| ; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X]], 10
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| ; CHECK-NEXT:    br i1 [[C_1]], label [[EXIT]], label [[LOOP_LATCH]]
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| ; CHECK:       loop.latch:
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| ; CHECK-NEXT:    [[F_1:%.*]] = icmp ule i32 [[X]], 10
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| ; CHECK-NEXT:    call void @use(i1 false)
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| ; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i32 [[X]], 10
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| ; CHECK-NEXT:    call void @use(i1 true)
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| ; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt i32 [[X]], 11
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| ; CHECK-NEXT:    call void @use(i1 [[C_2]])
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| ; CHECK-NEXT:    [[C_3:%.*]] = icmp ule i32 [[X]], 11
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| ; CHECK-NEXT:    call void @use(i1 [[C_3]])
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| ; CHECK-NEXT:    [[X_NEXT]] = add i32 [[X]], 1
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| ; CHECK-NEXT:    br label [[LOOP_HEADER]]
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| ; CHECK:       exit:
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| ; CHECK-NEXT:    [[C_4:%.*]] = icmp ugt i32 [[Y:%.*]], 10
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| ; CHECK-NEXT:    call void @use(i1 [[C_4]])
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| ; CHECK-NEXT:    ret i32 20
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| ;
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| entry:
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|   br i1 %c, label %loop.header, label %exit
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| 
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| loop.header:
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|   %x = phi i32 [ 0, %entry ], [ %x.next, %loop.latch ]
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|   %c.1 = icmp ule i32 %x, 10
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|   br i1 %c.1, label %exit, label %loop.latch
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| 
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| loop.latch:
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|   %f.1 = icmp ule i32 %x, 10
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|   call void @use(i1 %f.1)
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|   %t.1 = icmp ugt i32 %x, 10
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|   call void @use(i1 %t.1)
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| 
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|   %c.2 = icmp ugt i32 %x, 11
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|   call void @use(i1 %c.2)
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|   %c.3 = icmp ule i32 %x,11
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|   call void @use(i1 %c.3)
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| 
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|   %x.next = add i32 %x, 1
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|   br label %loop.header
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| 
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| exit:
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|   %c.4 = icmp ugt i32 %y, 10
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|   call void @use(i1 %c.4)
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|   ret i32 20
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| }
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| 
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| define void @loop_header_dom_or(i32 %y, i1 %c) {
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| ; CHECK-LABEL: @loop_header_dom_or(
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| ; CHECK-NEXT:  entry:
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| ; CHECK-NEXT:    br i1 [[C:%.*]], label [[LOOP_HEADER:%.*]], label [[EXIT:%.*]]
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| ; CHECK:       loop.header:
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| ; CHECK-NEXT:    [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
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| ; CHECK-NEXT:    [[X_1:%.*]] = icmp ule i32 [[X]], 10
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| ; CHECK-NEXT:    [[Y_1:%.*]] = icmp ugt i32 [[Y:%.*]], 99
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| ; CHECK-NEXT:    [[OR:%.*]] = or i1 [[X_1]], [[Y_1]]
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| ; CHECK-NEXT:    br i1 [[OR]], label [[EXIT]], label [[LOOP_LATCH]]
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| ; CHECK:       loop.latch:
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| ; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i32 [[X]], 10
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| ; CHECK-NEXT:    call void @use(i1 true)
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| ; CHECK-NEXT:    [[F_1:%.*]] = icmp ule i32 [[X]], 10
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| ; CHECK-NEXT:    call void @use(i1 false)
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| ; CHECK-NEXT:    [[C_1:%.*]] = icmp ugt i32 [[X]], 11
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| ; CHECK-NEXT:    call void @use(i1 [[C_1]])
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| ; CHECK-NEXT:    [[C_2:%.*]] = icmp ule i32 [[X]], 11
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| ; CHECK-NEXT:    call void @use(i1 [[C_2]])
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| ; CHECK-NEXT:    [[T_2:%.*]] = icmp ule i32 [[Y]], 99
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| ; CHECK-NEXT:    call void @use(i1 true)
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| ; CHECK-NEXT:    [[F_2:%.*]] = icmp ugt i32 [[Y]], 99
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| ; CHECK-NEXT:    call void @use(i1 false)
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| ; CHECK-NEXT:    [[C_3:%.*]] = icmp ule i32 [[Y]], 98
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| ; CHECK-NEXT:    call void @use(i1 [[C_3]])
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| ; CHECK-NEXT:    [[C_4:%.*]] = icmp ule i32 [[Y]], 98
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| ; CHECK-NEXT:    call void @use(i1 [[C_4]])
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| ; CHECK-NEXT:    [[X_NEXT]] = add i32 [[X]], 1
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| ; CHECK-NEXT:    br label [[LOOP_HEADER]]
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| ; CHECK:       exit:
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| ; CHECK-NEXT:    [[C_5:%.*]] = icmp ugt i32 [[Y]], 10
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| ; CHECK-NEXT:    call void @use(i1 [[C_5]])
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| ; CHECK-NEXT:    ret void
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| ;
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| entry:
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|   br i1 %c, label %loop.header, label %exit
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| 
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| loop.header:
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|   %x = phi i32 [ 0, %entry ], [ %x.next, %loop.latch ]
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|   %x.1 = icmp ule i32 %x, 10
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|   %y.1 = icmp ugt i32 %y, 99
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|   %or = or i1 %x.1, %y.1
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|   br i1 %or, label %exit, label %loop.latch
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| 
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| loop.latch:
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|   %t.1 = icmp ugt i32 %x, 10
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|   call void @use(i1 %t.1)
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|   %f.1 = icmp ule i32 %x, 10
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|   call void @use(i1 %f.1)
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|   %c.1 = icmp ugt i32 %x, 11
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|   call void @use(i1 %c.1)
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|   %c.2 = icmp ule i32 %x, 11
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|   call void @use(i1 %c.2)
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| 
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| 
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|   %t.2 = icmp ule i32 %y, 99
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|   call void @use(i1 %t.2)
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|   %f.2 = icmp ugt i32 %y, 99
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|   call void @use(i1 %f.2)
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| 
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|   %c.3 = icmp ule i32 %y, 98
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|   call void @use(i1 %c.3)
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|   %c.4 = icmp ule i32 %y, 98
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|   call void @use(i1 %c.4)
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| 
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|   %x.next = add i32 %x, 1
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|   br label %loop.header
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| 
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| exit:
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|   %c.5 = icmp ugt i32 %y, 10
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|   call void @use(i1 %c.5)
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|   ret void
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| }
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| 
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| define void @loop_header_dom_or_successors_flipped(i32 %y, i1 %c) {
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| ; CHECK-LABEL: @loop_header_dom_or_successors_flipped(
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| ; CHECK-NEXT:  entry:
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| ; CHECK-NEXT:    br i1 [[C:%.*]], label [[LOOP_HEADER:%.*]], label [[EXIT:%.*]]
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| ; CHECK:       loop.header:
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| ; CHECK-NEXT:    [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
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| ; CHECK-NEXT:    [[X_1:%.*]] = icmp ule i32 [[X]], 10
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| ; CHECK-NEXT:    [[Y_1:%.*]] = icmp ugt i32 [[Y:%.*]], 99
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| ; CHECK-NEXT:    [[OR:%.*]] = or i1 [[X_1]], [[Y_1]]
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| ; CHECK-NEXT:    br i1 [[OR]], label [[LOOP_LATCH]], label [[EXIT]]
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| ; CHECK:       loop.latch:
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| ; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X]], 10
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| ; CHECK-NEXT:    call void @use(i1 [[C_1]])
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| ; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt i32 [[X]], 10
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| ; CHECK-NEXT:    call void @use(i1 [[C_2]])
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| ; CHECK-NEXT:    [[C_3:%.*]] = icmp ule i32 [[X]], 9
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| ; CHECK-NEXT:    call void @use(i1 [[C_3]])
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| ; CHECK-NEXT:    [[C_4:%.*]] = icmp ugt i32 [[X]], 9
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| ; CHECK-NEXT:    call void @use(i1 [[C_4]])
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| ; CHECK-NEXT:    [[C_5:%.*]] = icmp ugt i32 [[Y]], 99
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| ; CHECK-NEXT:    call void @use(i1 [[C_5]])
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| ; CHECK-NEXT:    [[C_6:%.*]] = icmp ule i32 [[Y]], 99
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| ; CHECK-NEXT:    call void @use(i1 [[C_6]])
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| ; CHECK-NEXT:    [[C_7:%.*]] = icmp ugt i32 [[Y]], 100
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| ; CHECK-NEXT:    call void @use(i1 [[C_7]])
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| ; CHECK-NEXT:    [[C_8:%.*]] = icmp ugt i32 [[Y]], 100
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| ; CHECK-NEXT:    call void @use(i1 [[C_8]])
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| ; CHECK-NEXT:    [[X_NEXT]] = add i32 [[X]], 1
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| ; CHECK-NEXT:    br label [[LOOP_HEADER]]
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| ; CHECK:       exit:
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| ; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i32 [[Y]], 10
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| ; CHECK-NEXT:    call void @use(i1 [[T_1]])
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| ; CHECK-NEXT:    ret void
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| ;
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| entry:
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|   br i1 %c, label %loop.header, label %exit
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| 
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| loop.header:
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|   %x = phi i32 [ 0, %entry ], [ %x.next, %loop.latch ]
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|   %x.1 = icmp ule i32 %x, 10
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|   %y.1 = icmp ugt i32 %y, 99
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|   %or = or i1 %x.1, %y.1
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|   br i1 %or, label %loop.latch, label %exit
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| 
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| loop.latch:
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|   %c.1 = icmp ule i32 %x, 10
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|   call void @use(i1 %c.1)
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|   %c.2 = icmp ugt i32 %x, 10
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|   call void @use(i1 %c.2)
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|   %c.3 = icmp ule i32 %x, 9
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|   call void @use(i1 %c.3)
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|   %c.4 = icmp ugt i32 %x, 9
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|   call void @use(i1 %c.4)
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| 
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| 
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|   %c.5 = icmp ugt i32 %y, 99
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|   call void @use(i1 %c.5)
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|   %c.6 = icmp ule i32 %y, 99
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|   call void @use(i1 %c.6)
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| 
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|   %c.7 = icmp ugt i32 %y, 100
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|   call void @use(i1 %c.7)
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|   %c.8 = icmp ugt i32 %y, 100
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|   call void @use(i1 %c.8)
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| 
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|   %x.next = add i32 %x, 1
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|   br label %loop.header
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| 
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| exit:
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|   %t.1 = icmp ugt i32 %y, 10
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|   call void @use(i1 %t.1)
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|   ret void
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| }
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| 
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| 
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| define void @loop_header_dom_and(i32 %y, i1 %c) {
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| ; CHECK-LABEL: @loop_header_dom_and(
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| ; CHECK-NEXT:  entry:
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| ; CHECK-NEXT:    br i1 [[C:%.*]], label [[LOOP_HEADER:%.*]], label [[EXIT:%.*]]
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| ; CHECK:       exit:
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| ; CHECK-NEXT:    [[C_5:%.*]] = icmp ugt i32 [[Y:%.*]], 10
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| ; CHECK-NEXT:    call void @use(i1 [[C_5]])
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| ; CHECK-NEXT:    ret void
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| ; CHECK:       loop.header:
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| ; CHECK-NEXT:    [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
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| ; CHECK-NEXT:    [[X_1:%.*]] = icmp ule i32 [[X]], 10
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| ; CHECK-NEXT:    [[Y_1:%.*]] = icmp ugt i32 [[Y]], 99
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| ; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X_1]], [[Y_1]]
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| ; CHECK-NEXT:    br i1 [[AND]], label [[LOOP_LATCH]], label [[EXIT_1:%.*]]
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| ; CHECK:       loop.latch:
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| ; CHECK-NEXT:    [[T_1:%.*]] = icmp ule i32 [[X]], 10
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| ; CHECK-NEXT:    call void @use(i1 true)
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| ; CHECK-NEXT:    [[F_1:%.*]] = icmp ugt i32 [[X]], 10
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| ; CHECK-NEXT:    call void @use(i1 false)
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| ; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X]], 9
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| ; CHECK-NEXT:    call void @use(i1 [[C_1]])
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| ; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt i32 [[X]], 9
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| ; CHECK-NEXT:    call void @use(i1 [[C_2]])
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| ; CHECK-NEXT:    [[T_2:%.*]] = icmp ugt i32 [[Y]], 99
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| ; CHECK-NEXT:    call void @use(i1 true)
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| ; CHECK-NEXT:    [[F_2:%.*]] = icmp ule i32 [[Y]], 99
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| ; CHECK-NEXT:    call void @use(i1 false)
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| ; CHECK-NEXT:    [[C_3:%.*]] = icmp ugt i32 [[Y]], 100
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| ; CHECK-NEXT:    call void @use(i1 [[C_3]])
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| ; CHECK-NEXT:    [[C_4:%.*]] = icmp ugt i32 [[Y]], 100
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| ; CHECK-NEXT:    call void @use(i1 [[C_4]])
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| ; CHECK-NEXT:    [[X_NEXT]] = add i32 [[X]], 1
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| ; CHECK-NEXT:    br label [[LOOP_HEADER]]
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| ; CHECK:       exit.1:
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| ; CHECK-NEXT:    [[C_6:%.*]] = icmp ugt i32 [[Y]], 10
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| ; CHECK-NEXT:    call void @use(i1 [[C_6]])
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| ; CHECK-NEXT:    ret void
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| ;
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| entry:
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|   br i1 %c, label %loop.header, label %exit
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| 
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| exit:
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|   %c.5 = icmp ugt i32 %y, 10
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|   call void @use(i1 %c.5)
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|   ret void
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| 
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| loop.header:
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|   %x = phi i32 [ 0, %entry ], [ %x.next, %loop.latch ]
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|   %x.1 = icmp ule i32 %x, 10
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|   %y.1 = icmp ugt i32 %y, 99
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|   %and = and i1 %x.1, %y.1
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|   br i1 %and, label %loop.latch, label %exit.1
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| 
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| loop.latch:
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|   %t.1 = icmp ule i32 %x, 10
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|   call void @use(i1 %t.1)
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|   %f.1 = icmp ugt i32 %x, 10
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|   call void @use(i1 %f.1)
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|   %c.1 = icmp ule i32 %x, 9
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|   call void @use(i1 %c.1)
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|   %c.2 = icmp ugt i32 %x, 9
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|   call void @use(i1 %c.2)
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| 
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| 
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|   %t.2 = icmp ugt i32 %y, 99
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|   call void @use(i1 %t.2)
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|   %f.2 = icmp ule i32 %y, 99
 | |
|   call void @use(i1 %f.2)
 | |
| 
 | |
|   %c.3 = icmp ugt i32 %y, 100
 | |
|   call void @use(i1 %c.3)
 | |
|   %c.4 = icmp ugt i32 %y, 100
 | |
|   call void @use(i1 %c.4)
 | |
| 
 | |
|   %x.next = add i32 %x, 1
 | |
|   br label %loop.header
 | |
| 
 | |
| exit.1:
 | |
|   %c.6 = icmp ugt i32 %y, 10
 | |
|   call void @use(i1 %c.6)
 | |
|   ret void
 | |
| }
 | |
| 
 | |
| define void @loop_header_dom_and_successors_flipped(i32 %y, i1 %c) {
 | |
| ; CHECK-LABEL: @loop_header_dom_and_successors_flipped(
 | |
| ; CHECK-NEXT:  entry:
 | |
| ; CHECK-NEXT:    br i1 [[C:%.*]], label [[LOOP_HEADER:%.*]], label [[EXIT:%.*]]
 | |
| ; CHECK:       exit:
 | |
| ; CHECK-NEXT:    [[C_9:%.*]] = icmp ugt i32 [[Y:%.*]], 10
 | |
| ; CHECK-NEXT:    call void @use(i1 [[C_9]])
 | |
| ; CHECK-NEXT:    ret void
 | |
| ; CHECK:       loop.header:
 | |
| ; CHECK-NEXT:    [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
 | |
| ; CHECK-NEXT:    [[X_1:%.*]] = icmp ule i32 [[X]], 10
 | |
| ; CHECK-NEXT:    [[Y_1:%.*]] = icmp ugt i32 [[Y]], 99
 | |
| ; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X_1]], [[Y_1]]
 | |
| ; CHECK-NEXT:    br i1 [[AND]], label [[EXIT_1:%.*]], label [[LOOP_LATCH]]
 | |
| ; CHECK:       loop.latch:
 | |
| ; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X]], 10
 | |
| ; CHECK-NEXT:    call void @use(i1 [[C_1]])
 | |
| ; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt i32 [[X]], 10
 | |
| ; CHECK-NEXT:    call void @use(i1 [[C_2]])
 | |
| ; CHECK-NEXT:    [[C_3:%.*]] = icmp ule i32 [[X]], 9
 | |
| ; CHECK-NEXT:    call void @use(i1 [[C_3]])
 | |
| ; CHECK-NEXT:    [[C_4:%.*]] = icmp ugt i32 [[X]], 9
 | |
| ; CHECK-NEXT:    call void @use(i1 [[C_4]])
 | |
| ; CHECK-NEXT:    [[C_5:%.*]] = icmp ugt i32 [[Y]], 99
 | |
| ; CHECK-NEXT:    call void @use(i1 [[C_5]])
 | |
| ; CHECK-NEXT:    [[C_6:%.*]] = icmp ule i32 [[Y]], 99
 | |
| ; CHECK-NEXT:    call void @use(i1 [[C_6]])
 | |
| ; CHECK-NEXT:    [[C_7:%.*]] = icmp ugt i32 [[Y]], 100
 | |
| ; CHECK-NEXT:    call void @use(i1 [[C_7]])
 | |
| ; CHECK-NEXT:    [[C_8:%.*]] = icmp ugt i32 [[Y]], 100
 | |
| ; CHECK-NEXT:    call void @use(i1 [[C_8]])
 | |
| ; CHECK-NEXT:    [[X_NEXT]] = add i32 [[X]], 1
 | |
| ; CHECK-NEXT:    br label [[LOOP_HEADER]]
 | |
| ; CHECK:       exit.1:
 | |
| ; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i32 [[Y]], 10
 | |
| ; CHECK-NEXT:    call void @use(i1 true)
 | |
| ; CHECK-NEXT:    ret void
 | |
| ;
 | |
| entry:
 | |
|   br i1 %c, label %loop.header, label %exit
 | |
| 
 | |
| exit:
 | |
|   %c.9 = icmp ugt i32 %y, 10
 | |
|   call void @use(i1 %c.9)
 | |
|   ret void
 | |
| 
 | |
| loop.header:
 | |
|   %x = phi i32 [ 0, %entry ], [ %x.next, %loop.latch ]
 | |
|   %x.1 = icmp ule i32 %x, 10
 | |
|   %y.1 = icmp ugt i32 %y, 99
 | |
|   %and = and i1 %x.1, %y.1
 | |
|   br i1 %and, label %exit.1, label %loop.latch
 | |
| 
 | |
| loop.latch:
 | |
|   %c.1 = icmp ule i32 %x, 10
 | |
|   call void @use(i1 %c.1)
 | |
|   %c.2 = icmp ugt i32 %x, 10
 | |
|   call void @use(i1 %c.2)
 | |
|   %c.3 = icmp ule i32 %x, 9
 | |
|   call void @use(i1 %c.3)
 | |
|   %c.4 = icmp ugt i32 %x, 9
 | |
|   call void @use(i1 %c.4)
 | |
| 
 | |
| 
 | |
|   %c.5 = icmp ugt i32 %y, 99
 | |
|   call void @use(i1 %c.5)
 | |
|   %c.6 = icmp ule i32 %y, 99
 | |
|   call void @use(i1 %c.6)
 | |
| 
 | |
|   %c.7 = icmp ugt i32 %y, 100
 | |
|   call void @use(i1 %c.7)
 | |
|   %c.8 = icmp ugt i32 %y, 100
 | |
|   call void @use(i1 %c.8)
 | |
| 
 | |
|   %x.next = add i32 %x, 1
 | |
|   br label %loop.header
 | |
| 
 | |
| exit.1:
 | |
|   %t.1 = icmp ugt i32 %y, 10
 | |
|   call void @use(i1 %t.1)
 | |
|   ret void
 | |
| }
 |