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https://github.com/Gericom/teak-llvm.git
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600e9deacf
This is meant to be used with clang's __builtin_dynamic_object_size. When 'true' is passed to this parameter, the intrinsic has the potential to be folded into instructions that will be evaluated at run time. When 'false', the objectsize intrinsic behaviour is unchanged. rdar://32212419 Differential revision: https://reviews.llvm.org/D56761 llvm-svn: 352664
87 lines
2.7 KiB
LLVM
87 lines
2.7 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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declare i32 @__gxx_personality_v0(...)
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declare void @__cxa_call_unexpected(i8*)
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declare i64 @llvm.objectsize.i64(i8*, i1) nounwind readonly
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declare i8* @_Znwm(i64)
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; CHECK-LABEL: @f1(
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define i64 @f1() nounwind uwtable ssp personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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entry:
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; CHECK: nvoke noalias i8* undef()
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%call = invoke noalias i8* undef()
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to label %invoke.cont unwind label %lpad
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invoke.cont:
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; CHECK: ret i64 0
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%0 = tail call i64 @llvm.objectsize.i64(i8* %call, i1 false)
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ret i64 %0
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lpad:
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%1 = landingpad { i8*, i32 }
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filter [0 x i8*] zeroinitializer
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%2 = extractvalue { i8*, i32 } %1, 0
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tail call void @__cxa_call_unexpected(i8* %2) noreturn nounwind
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unreachable
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}
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; CHECK-LABEL: @f2(
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define i64 @f2() nounwind uwtable ssp personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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entry:
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; CHECK: nvoke noalias i8* null()
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%call = invoke noalias i8* null()
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to label %invoke.cont unwind label %lpad
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invoke.cont:
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; CHECK: ret i64 0
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%0 = tail call i64 @llvm.objectsize.i64(i8* %call, i1 false)
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ret i64 %0
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lpad:
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%1 = landingpad { i8*, i32 }
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filter [0 x i8*] zeroinitializer
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%2 = extractvalue { i8*, i32 } %1, 0
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tail call void @__cxa_call_unexpected(i8* %2) noreturn nounwind
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unreachable
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}
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; CHECK-LABEL: @f2_no_null_opt(
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define i64 @f2_no_null_opt() nounwind uwtable ssp #0 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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entry:
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; CHECK: invoke noalias i8* null()
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%call = invoke noalias i8* null()
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to label %invoke.cont unwind label %lpad
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invoke.cont:
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; CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %call, i1 false, i1 false, i1 false)
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%0 = tail call i64 @llvm.objectsize.i64(i8* %call, i1 false)
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ret i64 %0
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lpad:
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%1 = landingpad { i8*, i32 }
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filter [0 x i8*] zeroinitializer
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%2 = extractvalue { i8*, i32 } %1, 0
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tail call void @__cxa_call_unexpected(i8* %2) noreturn nounwind
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unreachable
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}
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attributes #0 = { "null-pointer-is-valid"="true" }
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; CHECK-LABEL: @f3(
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define void @f3() nounwind uwtable ssp personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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; CHECK: invoke void @llvm.donothing()
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%call = invoke noalias i8* @_Znwm(i64 13)
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to label %invoke.cont unwind label %lpad
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invoke.cont:
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ret void
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lpad:
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%1 = landingpad { i8*, i32 }
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filter [0 x i8*] zeroinitializer
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%2 = extractvalue { i8*, i32 } %1, 0
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tail call void @__cxa_call_unexpected(i8* %2) noreturn nounwind
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unreachable
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}
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