[LLVMbugs] [Bug 1233] NEW: multi-dimensional VLA indicies not scaled by llvm-gcc

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=1233

           Summary: multi-dimensional VLA indicies not scaled by llvm-gcc
           Product: tools
           Version: 1.9
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: llvm-gcc
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: djg at cray.com


I typed this into the online demo:

int foo(int v, int w, int x, int y, int z,
        float A[][w][x][y][z],
        int g, int h, int i, int j, int k)
{
  return A[g][h][i][j][k];
}

It gave me this:

int %foo(int %v, int %w, int %x, int %y, int %z, float* %A, int %g, int %h, int
%i, int %j, int %k) {
entry:
	%tmp64.sum = add int %h, %g		; <int> [#uses=1]
	%tmp62.sum = add int %tmp64.sum, %i		; <int> [#uses=1]
	%tmp60.sum = add int %tmp62.sum, %j		; <int> [#uses=1]
	%tmp54.sum = add int %tmp60.sum, %k		; <int> [#uses=1]
	%tmp66 = getelementptr float* %A, int %tmp54.sum		; <float*> [#uses=1]
	%tmp = load float* %tmp66		; <float> [#uses=1]
	%tmp67 = cast float %tmp to int		; <int> [#uses=1]
	ret int %tmp67
}

The VLA indicies are not being scaled; it's just adding them all up verbatim and
doing a one-dimensional getelementptr.



------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.