Home | History | Annotate | Download | only in SimplifyCFG 
      1 ; RUN: opt < %s -simplifycfg -S | FileCheck %s
      2 
      3 declare void @bar()
      4 
      5 ; This testcase checks to see if the simplifycfg pass is converting invoke
      6 ; instructions to call instructions if the handler just rethrows the exception.
      7 define i32 @test1() personality i32 (...)* @__gxx_personality_v0 {
      8 ; CHECK-LABEL: @test1(
      9 ; CHECK-NEXT: call void @bar()
     10 ; CHECK-NEXT: ret i32 0
     11         invoke void @bar( )
     12                         to label %1 unwind label %Rethrow
     13         ret i32 0
     14 Rethrow:
     15         %exn = landingpad {i8*, i32}
     16                  catch i8* null
     17         resume { i8*, i32 } %exn
     18 }
     19 
     20 define i32 @test2() personality i32 (...)* @__gxx_personality_v0 {
     21 ; CHECK-LABEL: @test2(
     22 ; CHECK-NEXT: call void @bar() [ "foo"(i32 100) ]
     23 ; CHECK-NEXT: ret i32 0
     24         invoke void @bar( ) [ "foo"(i32 100) ]
     25                         to label %1 unwind label %Rethrow
     26         ret i32 0
     27 Rethrow:
     28         %exn = landingpad {i8*, i32}
     29                  catch i8* null
     30         resume { i8*, i32 } %exn
     31 }
     32 
     33 declare i64 @dummy1()
     34 declare i64 @dummy2()
     35 
     36 ; This testcase checks to see if simplifycfg pass can convert two invoke 
     37 ; instructions to call instructions if they share a common trivial unwind
     38 ; block.
     39 define i64 @test3(i1 %cond) personality i32 (...)* @__gxx_personality_v0 {
     40 entry:
     41 ; CHECK-LABEL: @test3(
     42 ; CHECK: %call1 = call i64 @dummy1()
     43 ; CHECK: %call2 = call i64 @dummy2()
     44 ; CHECK-NOT: resume { i8*, i32 } %lp
     45   br i1 %cond, label %br1, label %br2
     46 
     47 br1:
     48   %call1 = invoke i64 @dummy1()
     49           to label %invoke.cont unwind label %lpad1
     50           
     51 br2: 
     52   %call2 = invoke i64 @dummy2()
     53           to label %invoke.cont unwind label %lpad2
     54           
     55 invoke.cont:
     56   %c = phi i64 [%call1, %br1], [%call2, %br2]
     57   ret i64 %c 
     58   
     59   
     60 lpad1:
     61   %0 = landingpad { i8*, i32 }
     62           cleanup
     63   br label %rethrow 
     64 
     65 rethrow:
     66   %lp = phi { i8*, i32 } [%0, %lpad1], [%1, %lpad2]
     67   resume { i8*, i32 } %lp
     68   
     69 lpad2:
     70   %1 = landingpad { i8*, i32 }
     71           cleanup
     72   br label %rethrow
     73 }
     74 
     75 declare i32 @__gxx_personality_v0(...)
     76