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https://github.com/c64scene-ar/llvm-6502.git
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3769fe149b
- simplifycfg: invoke undef/null -> unreachable - instcombine: invoke new -> invoke expect(0, 0) (an arbitrary NOOP intrinsic; only done if the allocated memory is unused, of course) - verifier: allow invoke of intrinsics (to make the previous step work) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159146 91177308-0d34-0410-b5e6-96231b3b80d8
38 lines
1.2 KiB
LLVM
38 lines
1.2 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 noalias i8* @malloc(i32) nounwind
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declare noalias i8* @_Znwm(i64) ; new(unsigned long)
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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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; CHECK: @f1
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define i64 @f1() {
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%call = call i8* @malloc(i32 4)
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%size = call i64 @llvm.objectsize.i64(i8* %call, i1 false)
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; CHECK-NEXT: ret i64 4
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ret i64 %size
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}
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; CHECK: @f2
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define i64 @f2() nounwind uwtable ssp {
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entry:
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; CHECK: invoke i8 @llvm.expect.i8(i8 0, i8 0)
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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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; CHECK: ret i64 13
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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 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
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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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