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3 Commits

Author SHA1 Message Date
Tim Shen bb6fdd66fc [XRay] Fix XRay PPC return value bug. 
Summary:
This bug is caused by the incorrect handling of return-value registers.

According to OpenPOWER 64-Bit ELF V2 ABI 2.2.5, up to 2 general-purpose
registers are going to be used for return values, and up to 8 floating
point registers or vector registers are going to be used for return
values.

Reviewers: dberris, echristo

Subscribers: nemanjai, llvm-commits

Differential Revision: https://reviews.llvm.org/D33027

llvm-svn: 302691
 2017-05-10 16:28:21 +00:00
Bill Seurer e608f6a632 [powerpc] Mark coverage-sample.cc as XFAIL on powerpc64le 
When run this test case causes a segementation fault on powerpc64le.
The xfail should be removed when the problem is fixed.

llvm-svn: 302237
 2017-05-05 14:20:11 +00:00
Dean Michael Berris 5cc4632b5b [XRay][compiler-rt] Support patching/unpatching specific functions 
Summary:
This change allows us to patch/unpatch specific functions using the
function ID. This is useful in cases where implementations might want to
do coverage-style, or more fine-grained control of which functions to
patch or un-patch at runtime.

Depends on D32693.

Reviewers: dblaikie, echristo, kpw

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D32695

llvm-svn: 302112
 2017-05-04 04:59:20 +00:00