derek.holloway
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58 lines
1.6 KiB
LLVM
58 lines
1.6 KiB
LLVM
; REQUIRES: x86
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;; malloc+memset references can be combined to a calloc reference.
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;; Test that we extract calloc defined in a lazy bitcode file to satisfy
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;; possible references from LTO generated object files.
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; RUN: rm -rf %t && split-file %s %t && cd %t
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; RUN: llvm-as a.ll -o a.bc
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; RUN: llvm-as calloc.ll -o calloc.bc
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; RUN: llvm-mc -filetype=obj -triple=x86_64 lib.s -o lib.o
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; RUN: ld.lld -u foo a.bc --start-lib calloc.bc lib.o --end-lib -o t --save-temps
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; RUN: llvm-dis < t.0.4.opt.bc | FileCheck %s
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; RUN: llvm-nm t | FileCheck %s --check-prefix=NM
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; CHECK: define dso_local void @calloc
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; NM-NOT: {{.}}
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; NM: {{.*}} T _start
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;; TODO: Currently the symbol is lazy, which lowers to a SHN_ABS symbol at address 0.
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; NM-NEXT: {{.*}} T calloc
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; NM-NEXT: {{.*}} T foo
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; NM-NEXT: {{.*}} T malloc
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; NM-NEXT: {{.*}} T memset
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; NM-NOT: {{.}}
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;--- a.ll
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define ptr @foo() noinline {
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entry:
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%call = tail call noalias ptr @malloc(i64 400)
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tail call void @llvm.memset.p0.i64(ptr %call, i8 0, i64 400, i1 false)
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ret ptr %call
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}
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define void @_start(ptr %a, ptr %b) {
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entry:
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call ptr @foo()
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ret void
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}
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declare ptr @malloc(i64)
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declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg)
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;--- calloc.ll
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define void @calloc(i64, i64) {
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entry:
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ret void
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}
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;--- lib.s
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.globl malloc, memset
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malloc:
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memset:
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