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Fix for test_conversions failure with Clang build on Linux #1057 (#1062)

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* Avoid optimization by using volatile qualifier
    * Fix both uint2float and ulong2double
This commit is contained in:
sravikumar3393
2021-05-11 10:17:48 -07:00
committed by GitHub
parent 3dd6d4137d
commit 59a12047a8
1 changed files with 4 additions and 2 deletions
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6
test_conformance/conversions/basic_test_conversions.cpp
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@@ -678,7 +678,8 @@ static void uint2short( void *out, void *in){ ((short*) out)[0] = ((cl_uint*) in
static void uint2int( void *out, void *in){ ((cl_int*) out)[0] = ((cl_uint*) in)[0]; } static void uint2int( void *out, void *in){ ((cl_int*) out)[0] = ((cl_uint*) in)[0]; }
static void uint2float( void *out, void *in) static void uint2float( void *out, void *in)
{ {
cl_uint l = ((cl_uint*) in)[0]; // Use volatile to prevent optimization by Clang compiler
volatile cl_uint l = ((cl_uint *)in)[0];
((float*) out)[0] = (l == 0 ? 0.0f : (float) l); // Per IEEE-754-2008 5.4.1, 0's always convert to +0.0 ((float*) out)[0] = (l == 0 ? 0.0f : (float) l); // Per IEEE-754-2008 5.4.1, 0's always convert to +0.0
} }
static void uint2double( void *out, void *in) static void uint2double( void *out, void *in)
@@ -791,7 +792,8 @@ static void ulong2double( void *out, void *in)
#endif #endif
((double*) out)[0] = (l == 0 ? 0.0 : (((cl_long)l < 0) ? result * 2.0 : result)); ((double*) out)[0] = (l == 0 ? 0.0 : (((cl_long)l < 0) ? result * 2.0 : result));
#else #else
cl_ulong l = ((cl_ulong*) in)[0]; // Use volatile to prevent optimization by Clang compiler
volatile cl_ulong l = ((cl_ulong *)in)[0];
((double*) out)[0] = (l == 0 ? 0.0 : (double) l); // Per IEEE-754-2008 5.4.1, 0's always convert to +0.0 ((double*) out)[0] = (l == 0 ? 0.0 : (double) l); // Per IEEE-754-2008 5.4.1, 0's always convert to +0.0
#endif #endif
} }