2d037f5aed
For attributes assosiated with a value (like `dereferenceable(N)`) instead of always using the attribute from the to-be inlined caller, it should keep using the value at existing callsites that have the attribute if the value is higher (provides more information).
224 lines
7.4 KiB
LLVM
224 lines
7.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -inline-threshold=0 -passes=always-inline -S | FileCheck %s
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; RUN: opt < %s -passes=always-inline -S | FileCheck %s
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declare ptr @foo(ptr) nounwind willreturn
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define ptr @callee(ptr %p) alwaysinline {
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; CHECK-LABEL: @callee(
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; CHECK-NEXT: [[R:%.*]] = call ptr @foo(ptr noalias [[P:%.*]])
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; CHECK-NEXT: ret ptr [[R]]
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;
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%r = call ptr @foo(ptr noalias %p)
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ret ptr %r
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}
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define ptr @caller(ptr %ptr, i64 %x) {
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; CHECK-LABEL: @caller(
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[PTR:%.*]], i64 [[X:%.*]]
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; CHECK-NEXT: [[R_I:%.*]] = call nonnull ptr @foo(ptr noalias [[GEP]])
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; CHECK-NEXT: ret ptr [[R_I]]
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;
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%gep = getelementptr inbounds i8, ptr %ptr, i64 %x
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%p = call nonnull ptr @callee(ptr %gep)
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ret ptr %p
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}
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declare void @llvm.experimental.guard(i1,...)
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; Cannot add nonnull attribute to foo
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; because the guard is a throwing call
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define internal ptr @callee_with_throwable(ptr %p) alwaysinline {
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%r = call ptr @foo(ptr %p)
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%cond = icmp ne ptr %r, null
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call void (i1, ...) @llvm.experimental.guard(i1 %cond) [ "deopt"() ]
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ret ptr %r
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}
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declare ptr @bar(ptr) readonly nounwind
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; Here also we cannot add nonnull attribute to the call bar.
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define internal ptr @callee_with_explicit_control_flow(ptr %p) alwaysinline {
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%r = call ptr @bar(ptr %p)
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%cond = icmp ne ptr %r, null
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br i1 %cond, label %ret, label %orig
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ret:
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ret ptr %r
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orig:
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ret ptr %p
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}
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define ptr @caller2(ptr %ptr, i64 %x, i1 %cond) {
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; CHECK-LABEL: @caller2(
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[PTR:%.*]], i64 [[X:%.*]]
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; CHECK-NEXT: [[R_I:%.*]] = call ptr @foo(ptr [[GEP]])
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; CHECK-NEXT: [[COND_I:%.*]] = icmp ne ptr [[R_I]], null
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND_I]]) [ "deopt"() ]
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; CHECK-NEXT: [[R_I1:%.*]] = call ptr @bar(ptr [[GEP]])
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; CHECK-NEXT: [[COND_I2:%.*]] = icmp ne ptr [[R_I1]], null
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; CHECK-NEXT: br i1 [[COND_I2]], label [[RET_I:%.*]], label [[ORIG_I:%.*]]
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; CHECK: ret.i:
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; CHECK-NEXT: br label [[CALLEE_WITH_EXPLICIT_CONTROL_FLOW_EXIT:%.*]]
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; CHECK: orig.i:
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; CHECK-NEXT: br label [[CALLEE_WITH_EXPLICIT_CONTROL_FLOW_EXIT]]
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; CHECK: callee_with_explicit_control_flow.exit:
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; CHECK-NEXT: [[Q3:%.*]] = phi ptr [ [[R_I1]], [[RET_I]] ], [ [[GEP]], [[ORIG_I]] ]
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[PRET:%.*]], label [[QRET:%.*]]
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; CHECK: pret:
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; CHECK-NEXT: ret ptr [[R_I]]
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; CHECK: qret:
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; CHECK-NEXT: ret ptr [[Q3]]
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;
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%gep = getelementptr inbounds i8, ptr %ptr, i64 %x
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%p = call nonnull ptr @callee_with_throwable(ptr %gep)
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%q = call nonnull ptr @callee_with_explicit_control_flow(ptr %gep)
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br i1 %cond, label %pret, label %qret
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pret:
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ret ptr %p
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qret:
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ret ptr %q
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}
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define internal ptr @callee3(ptr %p) alwaysinline {
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%r = call noalias ptr @foo(ptr %p)
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ret ptr %r
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}
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; add the deref attribute to the existing attributes on foo.
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define ptr @caller3(ptr %ptr, i64 %x) {
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; CHECK-LABEL: @caller3(
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[PTR:%.*]], i64 [[X:%.*]]
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; CHECK-NEXT: [[R_I:%.*]] = call noalias dereferenceable_or_null(12) ptr @foo(ptr [[GEP]])
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; CHECK-NEXT: ret ptr [[R_I]]
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;
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%gep = getelementptr inbounds i8, ptr %ptr, i64 %x
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%p = call dereferenceable_or_null(12) ptr @callee3(ptr %gep)
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ret ptr %p
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}
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declare ptr @inf_loop_call(ptr) nounwind
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; We cannot propagate attributes to foo because we do not know whether inf_loop_call
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; will return execution.
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define internal ptr @callee_with_sideeffect_callsite(ptr %p) alwaysinline {
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%r = call ptr @foo(ptr %p)
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%v = call ptr @inf_loop_call(ptr %p)
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ret ptr %r
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}
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; do not add deref attribute to foo
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define ptr @test4(ptr %ptr, i64 %x) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[PTR:%.*]], i64 [[X:%.*]]
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; CHECK-NEXT: [[R_I:%.*]] = call ptr @foo(ptr [[GEP]])
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; CHECK-NEXT: [[V_I:%.*]] = call ptr @inf_loop_call(ptr [[GEP]])
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; CHECK-NEXT: ret ptr [[R_I]]
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;
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%gep = getelementptr inbounds i8, ptr %ptr, i64 %x
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%p = call dereferenceable_or_null(12) ptr @callee_with_sideeffect_callsite(ptr %gep)
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ret ptr %p
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}
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declare ptr @baz(ptr) nounwind willreturn
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define internal ptr @callee5(ptr %p) alwaysinline {
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%r = call ptr @foo(ptr %p)
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%v = call ptr @baz(ptr %p)
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ret ptr %r
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}
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; add the deref attribute to foo.
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define ptr @test5(ptr %ptr, i64 %x) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[PTR:%.*]], i64 [[X:%.*]]
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; CHECK-NEXT: [[R_I:%.*]] = call dereferenceable_or_null(12) ptr @foo(ptr [[GEP]])
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; CHECK-NEXT: [[V_I:%.*]] = call ptr @baz(ptr [[GEP]])
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; CHECK-NEXT: ret ptr [[R_I]]
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;
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%gep = getelementptr inbounds i8, ptr %ptr, i64 %x
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%s = call dereferenceable_or_null(12) ptr @callee5(ptr %gep)
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ret ptr %s
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}
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; deref attributes have different values on the callee and the call feeding into
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; the return.
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; AttrBuilder overwrites the existing value.
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define internal ptr @callee6(ptr %p) alwaysinline {
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%r = call dereferenceable_or_null(16) ptr @foo(ptr %p)
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%v = call ptr @baz(ptr %p)
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ret ptr %r
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}
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define ptr @test6(ptr %ptr, i64 %x) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[PTR:%.*]], i64 [[X:%.*]]
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; CHECK-NEXT: [[R_I:%.*]] = call dereferenceable_or_null(16) ptr @foo(ptr [[GEP]])
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; CHECK-NEXT: [[V_I:%.*]] = call ptr @baz(ptr [[GEP]])
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; CHECK-NEXT: ret ptr [[R_I]]
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;
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%gep = getelementptr inbounds i8, ptr %ptr, i64 %x
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%s = call dereferenceable_or_null(12) ptr @callee6(ptr %gep)
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ret ptr %s
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}
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; We add the attributes from the callee to both the calls below.
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define internal ptr @callee7(ptr %ptr, i1 %cond) alwaysinline {
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br i1 %cond, label %pass, label %fail
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pass:
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%r = call ptr @foo(ptr noalias %ptr)
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ret ptr %r
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fail:
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%s = call ptr @baz(ptr %ptr)
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ret ptr %s
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}
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define void @test7(ptr %ptr, i64 %x, i1 %cond) {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[PTR:%.*]], i64 [[X:%.*]]
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[PASS_I:%.*]], label [[FAIL_I:%.*]]
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; CHECK: pass.i:
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; CHECK-NEXT: [[R_I:%.*]] = call nonnull ptr @foo(ptr noalias [[GEP]])
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; CHECK-NEXT: br label [[CALLEE7_EXIT:%.*]]
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; CHECK: fail.i:
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; CHECK-NEXT: [[S_I:%.*]] = call nonnull ptr @baz(ptr [[GEP]])
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; CHECK-NEXT: br label [[CALLEE7_EXIT]]
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; CHECK: callee7.exit:
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; CHECK-NEXT: [[T1:%.*]] = phi ptr [ [[R_I]], [[PASS_I]] ], [ [[S_I]], [[FAIL_I]] ]
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; CHECK-NEXT: call void @snort(ptr [[T1]])
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; CHECK-NEXT: ret void
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;
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%gep = getelementptr inbounds i8, ptr %ptr, i64 %x
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%t = call nonnull ptr @callee7(ptr %gep, i1 %cond)
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call void @snort(ptr %t)
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ret void
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}
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declare void @snort(ptr)
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declare i32 @intrinsic(ptr) nounwind argmemonly
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define internal i32 @callee8(ptr %ptr) alwaysinline {
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%r = call i32 @intrinsic(ptr noalias %ptr)
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ret i32 %r
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}
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; signext is an attribute specific to the target ABI and not the
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; callee/callsite.
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; We cannot propagate that attribute to another call since it can be invalid at
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; that call.
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define i32 @test8(ptr %ptr, i64 %x) {
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; CHECK-LABEL: @test8(
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[PTR:%.*]], i64 [[X:%.*]]
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; CHECK-NEXT: [[R_I:%.*]] = call i32 @intrinsic(ptr noalias [[GEP]])
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; CHECK-NEXT: ret i32 [[R_I]]
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;
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%gep = getelementptr inbounds i8, ptr %ptr, i64 %x
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%t = call signext i32 @callee8(ptr %gep)
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ret i32 %t
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}
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