1 ; RUN: opt -o %t %s -instcombine -simplifycfg -thinlto-bc -verify-assumption-cache 2 ; RUN: llvm-dis -o - %t | FileCheck %s 3 4 ; Test that the simplifycfg pass correctly updates the assumption cache 5 ; when it clones the llvm.assume call as part of creating a critical 6 ; edge. To do that, we set up a pass pipeline such that (1) an assumption 7 ; cache is created for foo before simplifycfg updates it, and (2) foo's 8 ; assumption cache is verified after simplifycfg has run. To satisfy 1, we 9 ; run the instcombine pass first in our pipeline. To satisfy 2, we use the 10 ; ThinLTOBitcodeWriter pass to write bitcode (that pass uses the assumption 11 ; cache). That ensures that the pass manager does not call releaseMemory() 12 ; on the AssumptionCacheTracker before the end of the pipeline, which would 13 ; wipe out the bad assumption cache before it is verified. 14 15 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 16 target triple = "x86_64-unknown-linux-gnu" 17 18 %class.F = type { i8 } 19 %class.B = type { i8 } 20 %class.A = type { %class.C } 21 %class.C = type { i32 (...)** } 22 23 define void @foo(%class.F* %this, %class.B* %out) { 24 entry: 25 %call = tail call i32 @_ZNK1F5beginEv(%class.F* %this) 26 %call2 = tail call i32 @_ZNK1F3endEv(%class.F* %this) 27 %cmp.i22 = icmp eq i32 %call, %call2 28 br i1 %cmp.i22, label %while.end, label %while.body.preheader 29 30 while.body.preheader: 31 br label %while.body 32 33 while.body: 34 %frame_node.sroa.0.023 = phi i32 [ %inc.i, %_ZN10unique_ptrD2Ev.exit ], [ %call, %while.body.preheader ] 35 %call8 = tail call i8* @_Znwm(i64 8) 36 %inc.i = add nsw i32 %frame_node.sroa.0.023, 1 37 %cmp = icmp eq i32 %inc.i, %call2 38 br i1 %cmp, label %_ZN10unique_ptrD2Ev.exit, label %if.then 39 40 if.then: 41 tail call void @_ZN1B6appendEv(%class.B* %out) 42 br label %_ZN10unique_ptrD2Ev.exit 43 44 _ZN10unique_ptrD2Ev.exit: 45 %x1 = bitcast i8* %call8 to void (%class.A*)*** 46 %vtable.i.i = load void (%class.A*)**, void (%class.A*)*** %x1, align 8 47 %x2 = bitcast void (%class.A*)** %vtable.i.i to i8* 48 %x3 = tail call i1 @llvm.type.test(i8* %x2, metadata !"foo") 49 ; CHECK: call void @llvm.assume 50 ; CHECK: call void @llvm.assume 51 tail call void @llvm.assume(i1 %x3) #5 52 br i1 %cmp, label %while.end.loopexit, label %while.body 53 54 while.end.loopexit: 55 br label %while.end 56 57 while.end: 58 ret void 59 } 60 61 declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) 62 63 declare i32 @_ZNK1F5beginEv(%class.F*) 64 65 declare i32 @_ZNK1F3endEv(%class.F*) 66 67 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i1) 68 69 declare noalias nonnull i8* @_Znwm(i64) 70 71 declare void @_ZN1B6appendEv(%class.B*) 72 73 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) 74 75 declare i1 @llvm.type.test(i8*, metadata) 76 77 declare void @llvm.assume(i1) 78 79 !llvm.module.flags = !{!0} 80 !llvm.ident = !{!1} 81 82 !0 = !{i32 1, !"PIC Level", i32 2} 83 !1 = !{!"clang version 5.0.0 "} 84
