1; XFAIL: * 2; RUN: opt < %s -passes=newgvn -S | FileCheck %s 3 4%struct.A = type { ptr } 5@_ZTV1A = available_externally unnamed_addr constant [4 x ptr] [ptr null, ptr @_ZTI1A, ptr @_ZN1A3fooEv, ptr @_ZN1A3barEv], align 8 6@_ZTI1A = external constant ptr 7 8; Checks if indirect calls can be replaced with direct 9; assuming that %vtable == @_ZTV1A (with alignment). 10; Checking const propagation across other BBs 11; CHECK-LABEL: define void @_Z1gb( 12 13define void @_Z1gb(i1 zeroext %p) { 14entry: 15 %call = tail call noalias ptr @_Znwm(i64 8) #4 16 tail call void @_ZN1AC1Ev(ptr %call) #1 17 %vtable = load ptr, ptr %call, align 8 18 %cmp.vtables = icmp eq ptr %vtable, getelementptr inbounds ([4 x ptr], ptr @_ZTV1A, i64 0, i64 2) 19 tail call void @llvm.assume(i1 %cmp.vtables) 20 br i1 %p, label %if.then, label %if.else 21 22if.then: ; preds = %entry 23 %0 = load ptr, ptr %vtable, align 8 24 25 ; CHECK: call i32 @_ZN1A3fooEv( 26 %call2 = tail call i32 %0(ptr %call) #1 27 28 br label %if.end 29 30if.else: ; preds = %entry 31 %vfn47 = getelementptr inbounds ptr, ptr %vtable, i64 1 32 33 ; CHECK: call i32 @_ZN1A3barEv( 34 %1 = load ptr, ptr %vfn47, align 8 35 36 %call5 = tail call i32 %1(ptr %call) #1 37 br label %if.end 38 39if.end: ; preds = %if.else, %if.then 40 ret void 41} 42 43; Check integration with invariant.group handling 44; CHECK-LABEL: define void @invariantGroupHandling(i1 zeroext %p) { 45define void @invariantGroupHandling(i1 zeroext %p) { 46entry: 47 %call = tail call noalias ptr @_Znwm(i64 8) #4 48 tail call void @_ZN1AC1Ev(ptr %call) #1 49 %vtable = load ptr, ptr %call, align 8, !invariant.group !0 50 %cmp.vtables = icmp eq ptr %vtable, getelementptr inbounds ([4 x ptr], ptr @_ZTV1A, i64 0, i64 2) 51 tail call void @llvm.assume(i1 %cmp.vtables) 52 br i1 %p, label %if.then, label %if.else 53 54if.then: ; preds = %entry 55 %0 = load ptr, ptr %vtable, align 8 56 57; CHECK: call i32 @_ZN1A3fooEv( 58 %call2 = tail call i32 %0(ptr %call) #1 59 %vtable1 = load ptr, ptr %call, align 8, !invariant.group !0 60 %call1 = load ptr, ptr %vtable1, align 8 61; CHECK: call i32 @_ZN1A3fooEv( 62 %callx = tail call i32 %call1(ptr %call) #1 63 64 %vtable2 = load ptr, ptr %call, align 8, !invariant.group !0 65 %call4 = load ptr, ptr %vtable2, align 8 66; CHECK: call i32 @_ZN1A3fooEv( 67 %cally = tail call i32 %call4(ptr %call) #1 68 69 %vtable3 = load ptr, ptr %call, align 8, !invariant.group !0 70 %vfun = load ptr, ptr %vtable3, align 8 71; CHECK: call i32 @_ZN1A3fooEv( 72 %unknown = tail call i32 %vfun(ptr %call) #1 73 74 br label %if.end 75 76if.else: ; preds = %entry 77 %vfn47 = getelementptr inbounds ptr, ptr %vtable, i64 1 78 79 ; CHECK: call i32 @_ZN1A3barEv( 80 %1 = load ptr, ptr %vfn47, align 8 81 82 %call5 = tail call i32 %1(ptr %call) #1 83 br label %if.end 84 85if.end: ; preds = %if.else, %if.then 86 ret void 87} 88 89 90; Checking const propagation in the same BB 91; CHECK-LABEL: define i32 @main() 92 93define i32 @main() { 94entry: 95 %call = tail call noalias ptr @_Znwm(i64 8) 96 tail call void @_ZN1AC1Ev(ptr %call) 97 %vtable = load ptr, ptr %call, align 8 98 %cmp.vtables = icmp eq ptr %vtable, getelementptr inbounds ([4 x ptr], ptr @_ZTV1A, i64 0, i64 2) 99 tail call void @llvm.assume(i1 %cmp.vtables) 100 101 ; CHECK: call i32 @_ZN1A3fooEv( 102 %0 = load ptr, ptr %vtable, align 8 103 104 %call2 = tail call i32 %0(ptr %call) 105 ret i32 0 106} 107 108; This tests checks const propatation with fcmp instruction. 109; CHECK-LABEL: define float @_Z1gf(float %p) 110 111define float @_Z1gf(float %p) { 112entry: 113 %p.addr = alloca float, align 4 114 %f = alloca float, align 4 115 store float %p, ptr %p.addr, align 4 116 117 store float 3.000000e+00, ptr %f, align 4 118 %0 = load float, ptr %p.addr, align 4 119 %1 = load float, ptr %f, align 4 120 %cmp = fcmp oeq float %1, %0 ; note const on lhs 121 call void @llvm.assume(i1 %cmp) 122 123 ; CHECK: ret float 3.000000e+00 124 ret float %0 125} 126 127; CHECK-LABEL: define float @_Z1hf(float %p) 128 129define float @_Z1hf(float %p) { 130entry: 131 %p.addr = alloca float, align 4 132 store float %p, ptr %p.addr, align 4 133 134 %0 = load float, ptr %p.addr, align 4 135 %cmp = fcmp nnan ueq float %0, 3.000000e+00 136 call void @llvm.assume(i1 %cmp) 137 138 ; CHECK: ret float 3.000000e+00 139 ret float %0 140} 141 142declare noalias ptr @_Znwm(i64) 143declare void @_ZN1AC1Ev(ptr) 144declare void @llvm.assume(i1) 145declare i32 @_ZN1A3fooEv(ptr) 146declare i32 @_ZN1A3barEv(ptr) 147 148!0 = !{!"struct A"} 149