[LLVMbugs] [Bug 22215] New: Mips64el crash when using __uint128_t

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Tue Jan 13 09:33:35 PST 2015


            Bug ID: 22215
           Summary: Mips64el crash when using __uint128_t
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: james410 at cowgill.org.uk
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Found while attempting to compile libdispatch on mips64el.

Compiling this testcase (generated by creduce):

__uint128_t a;
fn1() { a *= b; }

With clang like this:
clang-3.6 -target mips64el-unknown-linux-gnuabi64 test.c

Gives this error:
fatal error: error in backend: Cannot select: 0x277a470: i64,i64 = umul_lohi
0x27772e0, 0x277a140 [ORD=6] [ID=17]
  0x27772e0: i64,ch = load 0x275b200, 0x277acf0, 0x27773f0<LD8[@a](align=16)>
[ORD=5] [ID=13]
    0x277acf0: i64,ch = load 0x275b200, 0x2777b60, 0x27773f0<LD8[GOT]> [ORD=5]
      0x2777b60: i64 = MipsISD::Wrapper 0x2777940, 0x277a250 [ORD=5] [ID=9]
        0x2777940: i64 = Register %vreg0 [ID=7]
        0x277a250: i64 = TargetGlobalAddress<i128* @a> 0 [TF=16] [ORD=5] [ID=6]
      0x27773f0: i64 = undef [ID=1]
    0x27773f0: i64 = undef [ID=1]
  0x277a140: i64,ch = load 0x275b200, 0x277b340, 0x27773f0<LD4[@b], sext from
i32> [ORD=4] [ID=15]
    0x277b340: i64,ch = load 0x275b200, 0x277b230, 0x27773f0<LD8[GOT]> [ORD=3]
      0x277b230: i64 = MipsISD::Wrapper 0x2777940, 0x2777720 [ORD=3] [ID=10]
        0x2777940: i64 = Register %vreg0 [ID=7]
        0x2777720: i64 = TargetGlobalAddress<i32* @b> 0 [TF=16] [ORD=3] [ID=8]
      0x27773f0: i64 = undef [ID=1]
    0x27773f0: i64 = undef [ID=1]
In function: fn1
clang: error: clang frontend command failed with exit code 70 (use -v to see
Debian clang version 3.6.0-svn224810-1 (trunk) (based on LLVM 3.6.0)

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