llvm-mirror

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Chris Lattner b3dfd0aecd Turn select C, (X+Y), (X-Y) --> (X+(select C, Y, (-Y))). This occurs in

the 'sim' program and probably elsewhere.  In sim, it comes up for cases
like this:

#define round(x) ((x)>0.0 ? (x)+0.5 : (x)-0.5)
double G;
void T(double X) { G = round(X); }

(it uses the round macro a lot).  This changes the LLVM code from:

        %tmp.1 = setgt double %X, 0.000000e+00          ; <bool> [#uses=1]
        %tmp.4 = add double %X, 5.000000e-01            ; <double> [#uses=1]
        %tmp.6 = sub double %X, 5.000000e-01            ; <double> [#uses=1]
        %mem_tmp.0 = select bool %tmp.1, double %tmp.4, double %tmp.6
        store double %mem_tmp.0, double* %G

to:

        %tmp.1 = setgt double %X, 0.000000e+00          ; <bool> [#uses=1]
        %mem_tmp.0.p = select bool %tmp.1, double 5.000000e-01, double -5.000000e-01
        %mem_tmp.0 = add double %mem_tmp.0.p, %X
        store double %mem_tmp.0, double* %G
        ret void

llvm-svn: 19537

2005-01-13 22:52:24 +00:00

Hello

Add the LOADABLE_MODULE=1 directive to indicate that this shared library is

2005-01-11 04:33:32 +00:00

Instrumentation

Convert tabs to spaces

2005-01-07 07:05:34 +00:00

IPO

Apply feedback from Chris.

2005-01-10 04:23:32 +00:00

Scalar

Turn select C, (X+Y), (X-Y) --> (X+(select C, Y, (-Y))). This occurs in