derek.holloway
7502bf64a4
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84 lines
2.5 KiB
LLVM
84 lines
2.5 KiB
LLVM
; Checks if bitcasted call expression can be evaluated
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; Given call expresion:
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; ptr @_ZL3fooP3Foo(ptr @gBar)
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; We evaluate call to function @_ZL3fooP3Foo casting both parameter and return value
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; Given call expression:
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; void @_ZL3bazP3Foo(ptr @gBar)
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; We evaluate call to function _ZL3bazP3Foo casting its parameter and check that evaluated value (nullptr)
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; is handled correctly
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; RUN: opt -passes=globalopt,instcombine -S %s -o - | FileCheck %s
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; CHECK: @gBar = local_unnamed_addr global %struct.Bar { i32 2 }
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; CHECK-NEXT: @_s = local_unnamed_addr global %struct.S { i32 1 }, align 4
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; CHECK-NEXT: @llvm.global_ctors = appending global [0 x { i32, ptr, ptr }] zeroinitializer
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; CHECK: define i32 @main()
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; CHECK-NEXT: ret i32 0
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.12.0"
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%struct.Bar = type { i32 }
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%struct.S = type { i32 }
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%struct.Foo = type { i32 }
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@gBar = global %struct.Bar zeroinitializer, align 4
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@_s = global %struct.S zeroinitializer, align 4
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@llvm.global_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @_GLOBAL__sub_I_main.cpp, ptr null }]
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define internal void @__cxx_global_var_init() section "__TEXT,__StaticInit,regular,pure_instructions" {
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call void @_ZN1SC1Ev_alias(ptr @_s)
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ret void
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}
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@_ZN1SC1Ev_alias = linkonce_odr unnamed_addr alias void (ptr), ptr @_ZN1SC1Ev
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define linkonce_odr void @_ZN1SC1Ev(ptr) unnamed_addr align 2 {
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%2 = alloca ptr, align 8
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store ptr %0, ptr %2, align 8
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%3 = load ptr, ptr %2, align 8
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call void @_ZN1SC2Ev(ptr %3)
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ret void
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}
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define i32 @main() {
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%1 = alloca i32, align 4
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store i32 0, ptr %1, align 4
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ret i32 0
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}
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define linkonce_odr void @_ZN1SC2Ev(ptr) unnamed_addr align 2 {
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%2 = alloca ptr, align 8
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store ptr %0, ptr %2, align 8
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%3 = load ptr, ptr %2, align 8
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%4 = call ptr @_ZL3fooP3Foo(ptr @gBar)
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%5 = load i32, ptr %4, align 4
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store i32 %5, ptr %3, align 4
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call void @_ZL3bazP3Foo(ptr @gBar)
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ret void
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}
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define internal ptr @_ZL3fooP3Foo(ptr) {
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%2 = alloca ptr, align 8
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store ptr %0, ptr %2, align 8
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%3 = load ptr, ptr %2, align 8
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store i32 1, ptr %3, align 4
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%4 = load ptr, ptr %2, align 8
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ret ptr %4
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}
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define internal void @_ZL3bazP3Foo(ptr) {
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%2 = alloca ptr, align 8
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store ptr %0, ptr %2, align 8
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%3 = load ptr, ptr %2, align 8
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store i32 2, ptr %3, align 4
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ret void
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}
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; Function Attrs: noinline ssp uwtable
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define internal void @_GLOBAL__sub_I_main.cpp() section "__TEXT,__StaticInit,regular,pure_instructions" {
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call void @__cxx_global_var_init()
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ret void
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}
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