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[OpenCL] Test on half immediate support.
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Authored by echuraev on May 26 2017, 5:26 AM.

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LGTM! Thanks!

This revision is now accepted and ready to land.May 26 2017, 6:46 AM

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test/

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	// CHECK-LABEL: @test_inc(half %x)			// CHECK-LABEL: @test_inc(half %x)
	// CHECK: [[INC:%.*]] = fadd half %x, 0xH3C00			// CHECK: [[INC:%.*]] = fadd half %x, 0xH3C00
	// CHECK: ret half [[INC]]			// CHECK: ret half [[INC]]
	half test_inc(half x)			half test_inc(half x)
	{			{
	return ++x;			return ++x;
	}			}

				__attribute__((overloadable)) int min(int, int);
				__attribute__((overloadable)) half min(half, half);
				__attribute__((overloadable)) float min(float, float);

				__kernel void foo( __global half* buf, __global float* buf2 )
				{
				buf[0] = min( buf[0], 1.5h );
				// CHECK: half 0xH3E00
				buf[0] = min( buf2[0], 1.5f );
				// CHECK: float 1.500000e+00

				const half one = 1.6666;
				buf[1] = min( buf[1], one );
				// CHECK: half 0xH3EAB
				}