Bug 1610048

Summary:	VSX f64->i32 loses bits in f32 intermediate
Product:	DevTools	Reporter:	Josh Stone <jistone>
Component:	llvm	Assignee:	Tom Stellard <tstellar>
Status:	CLOSED ERRATA	QA Contact:	Miloš Prchlík <mprchlik>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	llvm-toolset-7	CC:	jistone, law, mcermak, tborcin
Target Milestone:	rc
Target Release:	2018.4
Hardware:	ppc64le
OS:	Unspecified
Whiteboard:
Fixed In Version:	llvm-toolset-6.0-llvm-6.0.1-3.el7	Doc Type:	No Doc Update
Doc Text:	undefined	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-11-13 15:19:35 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1562196

Description Josh Stone 2018-07-30 23:08:52 UTC

In Rust bug 1562196, we found that LLVM codegen is using an f32 intermediate value for fptosi f64 to i32 when PowerPC VSX is enabled.

Filed upstream: https://bugs.llvm.org/show_bug.cgi?id=38342

Comment 1 Tom Stellard 2018-08-07 04:44:06 UTC

Fixed in llvm-toolset-6.0-llvm-6.0.1-3.el7.

Comment 3 Miloš Prchlík 2018-11-08 14:14:44 UTC

Verified with llvm-toolset-6.0-llvm-6.0.1-5.el7.

Comment 5 errata-xmlrpc 2018-11-13 15:19:35 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:3583