149 lines
4.4 KiB
LLVM
149 lines
4.4 KiB
LLVM
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; XFAIL: *
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; RUN: opt < %s -passes=newgvn -S | FileCheck %s
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%struct.A = type { ptr }
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@_ZTV1A = available_externally unnamed_addr constant [4 x ptr] [ptr null, ptr @_ZTI1A, ptr @_ZN1A3fooEv, ptr @_ZN1A3barEv], align 8
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@_ZTI1A = external constant ptr
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; Checks if indirect calls can be replaced with direct
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; assuming that %vtable == @_ZTV1A (with alignment).
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; Checking const propagation across other BBs
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; CHECK-LABEL: define void @_Z1gb(
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define void @_Z1gb(i1 zeroext %p) {
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entry:
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%call = tail call noalias ptr @_Znwm(i64 8) #4
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tail call void @_ZN1AC1Ev(ptr %call) #1
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%vtable = load ptr, ptr %call, align 8
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%cmp.vtables = icmp eq ptr %vtable, getelementptr inbounds ([4 x ptr], ptr @_ZTV1A, i64 0, i64 2)
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tail call void @llvm.assume(i1 %cmp.vtables)
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br i1 %p, label %if.then, label %if.else
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if.then: ; preds = %entry
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%0 = load ptr, ptr %vtable, align 8
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; CHECK: call i32 @_ZN1A3fooEv(
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%call2 = tail call i32 %0(ptr %call) #1
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br label %if.end
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if.else: ; preds = %entry
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%vfn47 = getelementptr inbounds ptr, ptr %vtable, i64 1
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; CHECK: call i32 @_ZN1A3barEv(
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%1 = load ptr, ptr %vfn47, align 8
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%call5 = tail call i32 %1(ptr %call) #1
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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ret void
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}
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; Check integration with invariant.group handling
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; CHECK-LABEL: define void @invariantGroupHandling(i1 zeroext %p) {
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define void @invariantGroupHandling(i1 zeroext %p) {
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entry:
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%call = tail call noalias ptr @_Znwm(i64 8) #4
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tail call void @_ZN1AC1Ev(ptr %call) #1
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%vtable = load ptr, ptr %call, align 8, !invariant.group !0
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%cmp.vtables = icmp eq ptr %vtable, getelementptr inbounds ([4 x ptr], ptr @_ZTV1A, i64 0, i64 2)
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tail call void @llvm.assume(i1 %cmp.vtables)
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br i1 %p, label %if.then, label %if.else
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if.then: ; preds = %entry
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%0 = load ptr, ptr %vtable, align 8
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; CHECK: call i32 @_ZN1A3fooEv(
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%call2 = tail call i32 %0(ptr %call) #1
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%vtable1 = load ptr, ptr %call, align 8, !invariant.group !0
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%call1 = load ptr, ptr %vtable1, align 8
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; CHECK: call i32 @_ZN1A3fooEv(
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%callx = tail call i32 %call1(ptr %call) #1
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%vtable2 = load ptr, ptr %call, align 8, !invariant.group !0
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%call4 = load ptr, ptr %vtable2, align 8
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; CHECK: call i32 @_ZN1A3fooEv(
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%cally = tail call i32 %call4(ptr %call) #1
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%vtable3 = load ptr, ptr %call, align 8, !invariant.group !0
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%vfun = load ptr, ptr %vtable3, align 8
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; CHECK: call i32 @_ZN1A3fooEv(
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%unknown = tail call i32 %vfun(ptr %call) #1
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br label %if.end
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if.else: ; preds = %entry
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%vfn47 = getelementptr inbounds ptr, ptr %vtable, i64 1
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; CHECK: call i32 @_ZN1A3barEv(
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%1 = load ptr, ptr %vfn47, align 8
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%call5 = tail call i32 %1(ptr %call) #1
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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ret void
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}
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; Checking const propagation in the same BB
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; CHECK-LABEL: define i32 @main()
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define i32 @main() {
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entry:
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%call = tail call noalias ptr @_Znwm(i64 8)
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tail call void @_ZN1AC1Ev(ptr %call)
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%vtable = load ptr, ptr %call, align 8
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%cmp.vtables = icmp eq ptr %vtable, getelementptr inbounds ([4 x ptr], ptr @_ZTV1A, i64 0, i64 2)
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tail call void @llvm.assume(i1 %cmp.vtables)
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; CHECK: call i32 @_ZN1A3fooEv(
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%0 = load ptr, ptr %vtable, align 8
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%call2 = tail call i32 %0(ptr %call)
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ret i32 0
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}
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; This tests checks const propatation with fcmp instruction.
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; CHECK-LABEL: define float @_Z1gf(float %p)
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define float @_Z1gf(float %p) {
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entry:
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%p.addr = alloca float, align 4
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%f = alloca float, align 4
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store float %p, ptr %p.addr, align 4
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store float 3.000000e+00, ptr %f, align 4
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%0 = load float, ptr %p.addr, align 4
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%1 = load float, ptr %f, align 4
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%cmp = fcmp oeq float %1, %0 ; note const on lhs
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call void @llvm.assume(i1 %cmp)
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; CHECK: ret float 3.000000e+00
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ret float %0
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}
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; CHECK-LABEL: define float @_Z1hf(float %p)
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define float @_Z1hf(float %p) {
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entry:
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%p.addr = alloca float, align 4
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store float %p, ptr %p.addr, align 4
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%0 = load float, ptr %p.addr, align 4
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%cmp = fcmp nnan ueq float %0, 3.000000e+00
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call void @llvm.assume(i1 %cmp)
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; CHECK: ret float 3.000000e+00
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ret float %0
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}
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declare noalias ptr @_Znwm(i64)
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declare void @_ZN1AC1Ev(ptr)
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declare void @llvm.assume(i1)
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declare i32 @_ZN1A3fooEv(ptr)
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declare i32 @_ZN1A3barEv(ptr)
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!0 = !{!"struct A"}
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