re PR target/87033 (The compiler does not generate the LWAX instruction)
[gcc] 2018-08-20 Michael Meissner <meissner@linux.ibm.com> PR target/87033 * config/rs6000/rs6000.md (extendsi<mode>2): Change constraints from 'Y' to 'YZ' to enable the LWAX instruction to be generated for indexed loads. [gcc/testsuite] 2018-08-20 Michael Meissner <meissner@linux.ibm.com> PR target/87033 * gcc.target/powerpc/pr87033.c: New test. From-SVN: r263678
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2018-08-20 Michael Meissner <meissner@linux.ibm.com>
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PR target/87033
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* config/rs6000/rs6000.md (extendsi<mode>2): Change constraints
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from 'Y' to 'YZ' to enable the LWAX instruction to be generated
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for indexed loads.
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2018-08-20 Nathan Sidwell <nathan@acm.org>
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Jeff Law <law@redhat.com>
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"=r, r, wl, wu, wj, wK, wH, wr")
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(sign_extend:EXTSI (match_operand:SI 1 "lwa_operand"
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"Y, r, Z, Z, r, wK, wH, ?wIwH")))]
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"YZ, r, Z, Z, r, wK, wH, ?wIwH")))]
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""
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"@
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lwa%U1%X1 %0,%1
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2018-08-20 Michael Meissner <meissner@linux.ibm.com>
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PR target/87033
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* gcc.target/powerpc/pr87033.c: New test.
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2018-08-20 Martin Sebor <msebor@redhat.com>
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PR tree-optimization/87034
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/* { dg-do compile { target { powerpc*-*-* && lp64 } } } */
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/* { dg-options "-O2" } */
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/* Insure that a LWAX is generated instead of ADD + LWA. LP64 is needed
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because the LWA and LWAX instructions are only available in 64-bit mode. */
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long func (int *p, unsigned long n)
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{
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return p[n];
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}
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/* { dg-final { scan-assembler {\mlwax\M} } } */
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/* { dg-final { scan-assembler-not {\mlwa\M} } } */
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