http://llvm.org/bugs/show_bug.cgi?id=20672
Bug ID: 20672
Summary: test/CodeGen/X86/asm-invalid-register-class-crasher.ll
doesn't test what it attempts to test
Product: libraries
Version: trunk
Hardware: Other
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
I recently debugged a problem on PowerPC exposed by the subject test case. In
the process, I discovered that the test doesn't do what it's intended to do.
During make check-all, the test generates the following script in
test/CodeGen/X86/Output/asm-invalid-register-class-crasher.ll.script:
set -o pipefail;{ not
/home/wschmidt/llvm/build/llvm-test/Release+Asserts/bin/l\
lc <
/home/wschmidt/llvm/llvm-test/test/CodeGen/X86/asm-invalid-register-class-\
crasher.ll -mtriple=i386-apple-darwin 2>&1
/home/wschmidt/llvm/build/llvm-test/\
test/CodeGen/X86/Output/asm-invalid-register-class-crasher.ll.tmp; }
This ends up actually attempting to read from
asm-invalid-register-class-crasher.ll.tmp, which doesn't exist. So the test
fails because of the non-existence of the file, which "not" then reports as
success. The IR in the test case is ignored.
The RUN line in the test is:
; RUN: not llc < %s -mtriple=i386-apple-darwin 2>&1 %t
I tried changing this to
; RUN: not llc < %s -mtriple=i386-apple-darwin >%t 2>&1
but "not" returns 1 in this case. Not sure how you want to fix this up but
it's not particulary useful as is (except for helping expose an elusive
self-hosting clang bug for PowerPC when opening a missing file). ;)
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