[llvm-bugs] [Bug 39151] New: [X86][SSE] Merge rL343373 into 7.0.1 - Fixed issue with v2i64 variable shifts on 32-bit targets

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=39151

            Bug ID: 39151
           Summary: [X86][SSE] Merge rL343373 into 7.0.1 - Fixed issue
                    with v2i64 variable shifts on 32-bit targets
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: llvm-dev at redking.me.uk
                CC: craig.topper at gmail.com, hans at chromium.org,
                    llvm-bugs at lists.llvm.org
            Blocks: 39106

[X86][SSE] Fixed issue with v2i64 variable shifts on 32-bit targets

The shift amount might have peeked through a extract_subvector, altering the
number of vector elements in the 'Amt' variable - so we were incorrectly
calculating the ratio when peeking through bitcasts, resulting in incorrectly
detecting splats.


Referenced Bugs:

https://bugs.llvm.org/show_bug.cgi?id=39106
[Bug 39106] [meta] 7.0.1 Release Blockers
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