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https://github.com/c64scene-ar/llvm-6502.git
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dc6b4b4fc2
Add user-supplied C runtime and compiler-rt library functions to llvm.compiler.used to protect them from premature optimization by passes like -globalopt and -ipsccp. Calls to (seemingly unused) runtime library functions can be added by -instcombine and instruction lowering. Patch by Duncan Exon Smith, thanks! Fixes <rdar://problem/14740087> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194514 91177308-0d34-0410-b5e6-96231b3b80d8
28 lines
487 B
LLVM
28 lines
487 B
LLVM
; runtime library implementations should be added to llvm.compiler.used
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; RUN: llvm-as <%s >%t1
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; RUN: llvm-lto -o %t2 %t1
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; RUN: llvm-nm -no-sort %t2 | FileCheck %s -check-prefix=KEEP -check-prefix=LOSE
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target triple = "x86_64-apple-darwin9"
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; KEEP-LABEL: _puts
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define void @puts() {
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ret void
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}
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; KEEP-LABEL: ___divti3
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define void @__divti3() {
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ret void
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}
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; KEEP-LABEL: _memset
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define void @memset() {
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ret void
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}
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; LOSE-NOT: _myprintf
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define void @myprintf() {
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ret void
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}
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