llvm-6502/test/BugPoint/replace-funcs-with-null.ll
JF Bastien 7b862ec88e bugpoint Enhancement.
Summary:
This patch adds two flags to `bugpoint`: "-replace-funcs-with-null" and "-disable-pass-list-reduction".

When "-replace-funcs-with-null" is specified, bugpoint will, instead of simply deleting function bodies, replace all uses of functions and then will delete functions completely from the test module, correctly handling aliasing and @llvm.used && @llvm.compiler.used. This part was conceived while trying to debug the PNaCl IR simplification passes, which don't allow undefined functions (ie no declarations).

With "-disable-pass-list-reduction", bugpoint won't try to reduce the set of passes causing the "crash". This is needed in cases where one is trying to debug an issue inside the PNaCl IR simplification passes which is causing an PNaCl ABI verification error, for example.

Reviewers: jfb

Reviewed By: jfb

Subscribers: jfb, llvm-commits

Differential Revision: http://reviews.llvm.org/D8555

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235362 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-20 23:42:22 +00:00

18 lines
525 B
LLVM

; Test that bugpoint can reduce the set of functions by replacing them with null.
;
; RUN: bugpoint -load %llvmshlibdir/BugpointPasses%shlibext %s -output-prefix %t -replace-funcs-with-null -bugpoint-crash-decl-funcs -silence-passes -safe-run-llc
; REQUIRES: loadable_module
@foo2 = alias i32 ()* @foo
define i32 @foo() { ret i32 1 }
define i32 @test() {
call i32 @test()
ret i32 %1
}
define i32 @bar() { ret i32 2 }
@llvm.used = appending global [1 x i8*] [i8* bitcast (i32 ()* @foo to i8*)], section "llvm.metadata"