[LLVMbugs] [Bug 4989] New: 2-element vector initialization expression doesn't work.

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Tue Sep 15 19:46:07 PDT 2009


           Summary: 2-element vector initialization expression doesn't work.
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: LLVM Codegen
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: syoyofujita at gmail.com
                CC: llvmbugs at cs.uiuc.edu

float2 a = (float2){val, val} expression seems doesn't work.
a.x should be 1.0 but it is initialized as nan.

CPU: x86
OS : Linux 32bit
CMD: clang main.c
Rev: 81991

// main.c
#include <stdio.h>

typedef float float2 __attribute__((ext_vector_type(2)));

test(float2 a, float2 b)
    return a + b;

    int argc,
    char **argv)
    int val = 1;
    float2 a = (float2){val, val};

    // Expects (1.0, 1.0), but gets (nan, 1.0)
    printf("a = %f, %f\n", a.x, a.y);

    return 0;

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