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* Fix #21024 - Optimize x^^c expressions Reason for the *magic* constraint c<8 on inlining x^^c: https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/x86_64/fpu/e_powl.S;h=47f129f34d368d7c67b8e5f2462b36b0bebb7621;hb=HEAD#l136 * Fix poor assumption about expression state * Restrict optimization to floating point expressions * Generalize optimization to any scalar data type * Fix segfault on x^^c where x is a single member anonymous enum DMD segfaulted on compiling the unittests in std/algorithm/sorting.o, the unittest that caused the segfault can be reduced to: enum real Two = 2.0; auto _ = Two^^3; I'm not sure why copying the anonymous enum into a `const` variable causes the compiler to segfault. * Add tests to x^^c inlining optimization * Fix missing type for e1 ^^ -1 to 1 / e1 rewrite * Move rewrites from constant folding to expression semantic and restrict them to [-1, 2] * Improve error message for the x^^2 rewrite. Before: ex.d(4): Error: can implicitly convert expression `(const const(double) __powtmp2 = x + 5.0;) , __powtmp2 * ...` of type `double` to `int` int y = ( x + 5 ) ^^ 2; ^ and after: ex.d(4): Error: cannot implicitly convert expression `(x + 5.0) ^^ 2L` of type `double` to `int` int y = ( x + 5 ) ^^ 2; ^ * Update C++ frontend header to match change in `CommaExp` * Address code review feedback Co-authored-by: Dennis Korpel <dkorpel@gmail.com> --------- Co-authored-by: Dennis Korpel <dkorpel@gmail.com>
44 lines
695 B
D
44 lines
695 B
D
/*
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REQUIRED_ARGS: -betterC
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RUN_OUTPUT:
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---
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Success
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---
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*/
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import core.stdc.stdio;
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void test1()
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{
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enum real Two = 2.0;
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static assert(Two^^3 == 8.0);
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}
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void test2()
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{
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double x = 5.0;
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assert(x^^-1 == 1/x);
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x = -1.0;
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assert(x^^1 == x);
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assert((x += 3) ^^ 2.0 == 4.0);
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assert((x) ^^ 2.0 == 4.0);
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assert((x *= 5) ^^ 2.0 == (x * x));
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assert(x^^-1 == 1.0 / x);
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assert((x^^-1) ^^ 0.0 == 1.0);
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}
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void test3()
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{
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int x = 6;
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assert(x ^^ 0 == 1);
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assert((x += 3) ^^ 2 == 81);
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assert(x ^^ 2 == (x ^^ 1) * (x ^^ 1));
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static assert(4.0 ^^ -1 == 0.25);
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}
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extern(C) void main()
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{
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test1();
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test2();
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test3();
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printf("Success\n");
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}
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