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Test failures on 32 bit Mesa compiled with GCC 7.x

Submitted by clayton craft @craftyguy

Assigned to Piglit Mailing List

Link to original bug (#104971)

Description

Compiling 32 bit Mesa with GCC 7.x and -O1 results in a number of test failures in piglit (e.g. packUnorm2x16).

These tests do not fail in either of the following cases:

  1. Mesa is compiled with GCC 7 and the -mfpmath=sse flag

  2. Mesa is compiled with GCC 6.x

  3. Mesa is compiled with -O0

Compiling Mesa with GCC 7 and negating the (exposed) options (e.g. -fno-<option>) that are enabled by -O1 still results in a failure. These options were collected from the output of: gcc -Q --help=optimizers -O1|grep enabled

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