[LLVMbugs] [Bug 21603] New: Codegen error for uitofp <4 x i32> %2 to <4 x double> on AVX.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=21603

            Bug ID: 21603
           Summary: Codegen error for uitofp <4 x i32> %2 to <4 x double>
                    on AVX.
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: zalman at google.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 13368
  --> http://llvm.org/bugs/attachment.cgi?id=13368&action=edit
llvm assembly for the erroneous case

The attached test generates incorrect output when compiled with:
    clang -O -mavx ~/llvm_bug.ll ~/llvm_bug_test.c -o /tmp/foo
and correct output when compiled with:
    clang -O ~/llvm_bug.ll ~/llvm_bug_test.c -o /tmp/foo

(On an x86 system.)

This bug was originally found in a Halide test case and repros on Linux and Mac
OS.

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