0676acb6fd
Should cover most of the tests for GVN, GVNHoist, GVNSink, GlobalOpt, GlobalSplit, InstCombine, Reassociate, SROA and TailCallElim that had not been updated earlier.
97 lines
3.4 KiB
LLVM
97 lines
3.4 KiB
LLVM
; RUN: opt -S -passes=gvn-hoist < %s | FileCheck %s
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; Checking gvn-hoist in case of infinite loops and irreducible control flow.
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; Check that bitcast is not hoisted beacuse down safety is not guaranteed.
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; CHECK-LABEL: @bazv1
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; CHECK: if.then.i:
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; CHECK: bitcast
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; CHECK-NEXT: load
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; CHECK: if.then4.i:
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; CHECK: bitcast
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; CHECK-NEXT: load
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%class.bar = type { i8*, %class.base* }
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%class.base = type { i32 (...)** }
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; Function Attrs: noreturn nounwind uwtable
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define void @bazv1() local_unnamed_addr {
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entry:
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%agg.tmp = alloca %class.bar, align 8
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%x.sroa.2.0..sroa_idx2 = getelementptr inbounds %class.bar, %class.bar* %agg.tmp, i64 0, i32 1
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store %class.base* null, %class.base** %x.sroa.2.0..sroa_idx2, align 8
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call void @_Z3foo3bar(%class.bar* nonnull %agg.tmp)
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%0 = load %class.base*, %class.base** %x.sroa.2.0..sroa_idx2, align 8
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%1 = bitcast %class.bar* %agg.tmp to %class.base*
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%cmp.i = icmp eq %class.base* %0, %1
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br i1 %cmp.i, label %if.then.i, label %if.else.i
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if.then.i: ; preds = %entry
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%2 = bitcast %class.base* %0 to void (%class.base*)***
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%vtable.i = load void (%class.base*)**, void (%class.base*)*** %2, align 8
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%vfn.i = getelementptr inbounds void (%class.base*)*, void (%class.base*)** %vtable.i, i64 2
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%3 = load void (%class.base*)*, void (%class.base*)** %vfn.i, align 8
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call void %3(%class.base* %0)
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br label %while.cond.preheader
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if.else.i: ; preds = %entry
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%tobool.i = icmp eq %class.base* %0, null
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br i1 %tobool.i, label %while.cond.preheader, label %if.then4.i
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if.then4.i: ; preds = %if.else.i
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%4 = bitcast %class.base* %0 to void (%class.base*)***
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%vtable6.i = load void (%class.base*)**, void (%class.base*)*** %4, align 8
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%vfn7.i = getelementptr inbounds void (%class.base*)*, void (%class.base*)** %vtable6.i, i64 3
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%5 = load void (%class.base*)*, void (%class.base*)** %vfn7.i, align 8
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call void %5(%class.base* nonnull %0)
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br label %while.cond.preheader
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while.cond.preheader: ; preds = %if.then.i, %if.else.i, %if.then4.i
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br label %while.cond
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while.cond: ; preds = %while.cond.preheader, %while.cond
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%call = call i32 @sleep(i32 10)
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br label %while.cond
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}
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declare void @_Z3foo3bar(%class.bar*) local_unnamed_addr
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declare i32 @sleep(i32) local_unnamed_addr
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; Check that the load is hoisted even if it is inside an irreducible control flow
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; because the load is anticipable on all paths.
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; CHECK-LABEL: @bazv
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; CHECK: bb2:
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; CHECK-NOT: load
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; CHECK-NOT: bitcast
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define void @bazv() {
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entry:
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%agg.tmp = alloca %class.bar, align 8
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%x= getelementptr inbounds %class.bar, %class.bar* %agg.tmp, i64 0, i32 1
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%0 = load %class.base*, %class.base** %x, align 8
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%1 = bitcast %class.bar* %agg.tmp to %class.base*
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%cmp.i = icmp eq %class.base* %0, %1
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br i1 %cmp.i, label %bb1, label %bb4
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bb1:
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%b1 = bitcast %class.base* %0 to void (%class.base*)***
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%i = load void (%class.base*)**, void (%class.base*)*** %b1, align 8
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%vfn.i = getelementptr inbounds void (%class.base*)*, void (%class.base*)** %i, i64 2
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%cmp.j = icmp eq %class.base* %0, %1
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br i1 %cmp.j, label %bb2, label %bb3
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bb2:
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%l1 = load void (%class.base*)*, void (%class.base*)** %vfn.i, align 8
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br label %bb3
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bb3:
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%l2 = load void (%class.base*)*, void (%class.base*)** %vfn.i, align 8
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br label %bb2
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bb4:
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%b2 = bitcast %class.base* %0 to void (%class.base*)***
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ret void
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}
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