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Many thanks to Richard Biener for approving the midde-end patch that cleared the way for this one. This nvptx patch defines the target hook TARGET_TRULY_NOOP_TRUNCATION to false, indicating that integer truncations require explicit instructions. nvptx.c already defines TARGET_MODES_TIEABLE_P and TARGET_CAN_CHANGE_MODE_CLASS to false, and as (previously) documented that may require TARGET_TRULY_NOOP_TRUNCATION to be defined likewise. This patch decreases the number of unexpected failures in the testsuite by 10, and increases the number of expected passes by 4, including these previous FAILs/ICEs: gcc.c-torture/compile/opout.c gcc.dg/torture/pr79125.c gcc.dg/tree-ssa/pr92085-1.c Unfortunately there is one testsuite failure that used to pass gcc.target/nvptx/v2si-cvt.c, but this isn't an ICE or incorrect code. This regression has been filed as PR96403, and the failing scan-assembler directives have been replaced by a reference to the PR. This patch has been tested on nvptx-none hosted on x86_64-pc-linux-gnu with "make" and "make check" with fewer ICEs and no wrong code regressions. 2020-07-31 Roger Sayle <roger@nextmovesoftware.com> Tom de Vries <tdevries@suse.de> gcc/ChangeLog: PR target/90928 * config/nvptx/nvptx.c (nvptx_truly_noop_truncation): Implement. (TARGET_TRULY_NOOP_TRUNCATION): Define. gcc/testsuite/ChangeLog: * gcc.target/nvptx/v2si-cvt.c: Simplify source. Remove scan-assembler directives. Mention PR96403. |
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