[llvm-bugs] [Bug 31918] New: [AMDGPU] error in backend: Cannot select: t18: i32 = addrspacecast[2 -> 0] t24

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=31918

            Bug ID: 31918
           Summary: [AMDGPU] error in backend: Cannot select: t18: i32 =
                    addrspacecast[2 -> 0] t24
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: AMDGPU
          Assignee: unassignedbugs at nondot.org
          Reporter: vedran at miletic.net
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

The following code:

#pragma OPENCL EXTENSION cl_khr_fp64 : disable

__kernel void compute_4(__global int *a,
                        __global float *b)
{
        int i = 0;
        float c[2] = {1, 2};
        int j = a[i];
        b[i] = c[j];
}

compiled using:

$ clang -Dcl_clang_storage_class_specifiers -isystem libclc/generic/include
-include clc/clc.h -target amdgcn-mesa-mesa3d -xcl asl.cl -cl-std=CL1.1 -o
asl.s

results in:

fatal error: error in backend: Cannot select: t18: i32 = addrspacecast[2 -> 0]
t24
  t24: i64 = add t16, t35
    t16: i64 = shl t29, Constant:i32<2>
      t29: i64 = sign_extend t28
        t28: i32,ch = load<LD4[%0(addrspace=1)](tbaa=<0x29090a8>)> t11, t33,
undef:i64
          t33: i64 = bitcast t32
            t32: v2i32,ch =
load<LD8[undef(addrspace=2)](nontemporal)(dereferenceable)(invariant)> t0, t2,
undef:i64
              t2: i64,ch = CopyFromReg t0, Register:i64 %vreg1
                t1: i64 = Register %vreg1
              t4: i64 = undef
          t4: i64 = undef
      t27: i32 = Constant<2>
    t35: i64 = PC_ADD_REL_OFFSET TargetGlobalAddress:i32<[2 x float]
addrspace(2)* @compute_4.c> + 4, TargetGlobalAddress:i32<[2 x float]
addrspace(2)* @compute_4.c> + 4
      t34: i32 = TargetGlobalAddress<[2 x float] addrspace(2)* @compute_4.c> +
4
      t34: i32 = TargetGlobalAddress<[2 x float] addrspace(2)* @compute_4.c> +
4
In function: compute_4
clang-5.0: error: clang frontend command failed with exit code 70 (use -v to
see invocation)
clang version 5.0.0 (https://github.com/llvm-mirror/clang.git
5808201fb358e2bf282226490e74eb74b867aee8)
(https://github.com/llvm-mirror/llvm.git
66a342c211a22d9214300986cc2c09957affcfab)
Target: amdgcn-mesa-mesa3d
Thread model: posix
InstalledDir: /usr/local/bin

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20170209/91084c99/attachment.html>