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Rozycki" To: gcc-patches@gcc.gnu.org cc: Andrew Waterman , Jim Wilson , Kito Cheng , Palmer Dabbelt Subject: [PATCH 39/44] RISC-V/testsuite: Add branchless cases for generic FP cond adds In-Reply-To: Message-ID: References: User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Spam-Status: No, score=1.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,KAM_ASCII_DIVIDERS,KAM_SHORT,LIKELY_SPAM_BODY,RCVD_IN_DNSWL_NONE,SCC_10_SHORT_WORD_LINES,SCC_5_SHORT_WORD_LINES,SPF_HELO_NONE,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Level: * X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: Verify, for generic floating-point conditional-add operations that have a corresponding conditional-set machine instruction, that if-conversion triggers via `noce_try_addcc' at `-mbranch-cost=3' setting, which makes branchless code sequences emitted by if-conversion cheaper than their original branched equivalents, and that extraneous instructions such as SNEZ, etc. are not present in output. The reason to XFAIL SImode tests for RV64 targets is the compiler thinks it has to sign-extend addends, which causes if-conversion to give up. gcc/testsuite/ * gcc.target/riscv/adddifeq.c: New test. * gcc.target/riscv/adddifge.c: New test. * gcc.target/riscv/adddifgt.c: New test. * gcc.target/riscv/adddifle.c: New test. * gcc.target/riscv/adddiflt.c: New test. * gcc.target/riscv/addsifeq.c: New test. * gcc.target/riscv/addsifge.c: New test. * gcc.target/riscv/addsifgt.c: New test. * gcc.target/riscv/addsifle.c: New test. * gcc.target/riscv/addsiflt.c: New test. --- gcc/testsuite/gcc.target/riscv/adddifeq.c | 26 ++++++++++++++++++++++++++ gcc/testsuite/gcc.target/riscv/adddifge.c | 26 ++++++++++++++++++++++++++ gcc/testsuite/gcc.target/riscv/adddifgt.c | 26 ++++++++++++++++++++++++++ gcc/testsuite/gcc.target/riscv/adddifle.c | 26 ++++++++++++++++++++++++++ gcc/testsuite/gcc.target/riscv/adddiflt.c | 26 ++++++++++++++++++++++++++ gcc/testsuite/gcc.target/riscv/addsifeq.c | 26 ++++++++++++++++++++++++++ gcc/testsuite/gcc.target/riscv/addsifge.c | 26 ++++++++++++++++++++++++++ gcc/testsuite/gcc.target/riscv/addsifgt.c | 26 ++++++++++++++++++++++++++ gcc/testsuite/gcc.target/riscv/addsifle.c | 26 ++++++++++++++++++++++++++ gcc/testsuite/gcc.target/riscv/addsiflt.c | 26 ++++++++++++++++++++++++++ 10 files changed, 260 insertions(+) gcc-riscv-test-addccf-generic.diff Index: gcc/gcc/testsuite/gcc.target/riscv/adddifeq.c =================================================================== --- /dev/null +++ gcc/gcc/testsuite/gcc.target/riscv/adddifeq.c @@ -0,0 +1,26 @@ +/* { dg-do compile } */ +/* { dg-require-effective-target rv64 } */ +/* { dg-skip-if "" { *-*-* } { "-O0" "-Og" "-Os" "-Oz" } } */ +/* { dg-options "-march=rv64gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -fdump-rtl-ce1" } */ + +typedef int __attribute__ ((mode (DI))) int_t; + +int_t +adddifeq (double w, double x, int_t y, int_t z) +{ + return w == x ? y + z : y; +} + +/* Expect branchless assembly like: + + feq.d a5,fa0,fa1 + neg a5,a5 + and a5,a5,a1 + add a0,a5,a0 + */ + +/* { dg-final { scan-rtl-dump-times "Conversion succeeded on pass 1\\." 1 "ce1" } } */ +/* { dg-final { scan-rtl-dump-times "if-conversion succeeded through noce_try_addcc" 1 "ce1" } } */ +/* { dg-final { scan-assembler-times "\\sfeq\\.d\\s" 1 } } */ +/* { dg-final { scan-assembler-not "\\s(?:seqz|snez)\\s" } } */ +/* { dg-final { scan-assembler-not "\\s(?:beq|bne)\\s" } } */ Index: gcc/gcc/testsuite/gcc.target/riscv/adddifge.c =================================================================== --- /dev/null +++ gcc/gcc/testsuite/gcc.target/riscv/adddifge.c @@ -0,0 +1,26 @@ +/* { dg-do compile } */ +/* { dg-require-effective-target rv64 } */ +/* { dg-skip-if "" { *-*-* } { "-O0" "-Og" "-Os" "-Oz" } } */ +/* { dg-options "-march=rv64gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -ffinite-math-only -fdump-rtl-ce1" } */ + +typedef int __attribute__ ((mode (DI))) int_t; + +int_t +adddifge (double w, double x, int_t y, int_t z) +{ + return w >= x ? y + z : y; +} + +/* Expect branchless assembly like: + + fge.d a5,fa0,fa1 + neg a5,a5 + and a5,a5,a1 + add a0,a5,a0 + */ + +/* { dg-final { scan-rtl-dump-times "Conversion succeeded on pass 1\\." 1 "ce1" } } */ +/* { dg-final { scan-rtl-dump-times "if-conversion succeeded through noce_try_addcc" 1 "ce1" } } */ +/* { dg-final { scan-assembler-times "\\s(?:fge\\.d|fgt\\.d|fle\\.d|flt\\.d)\\s" 1 } } */ +/* { dg-final { scan-assembler-not "\\s(?:seqz|snez)\\s" } } */ +/* { dg-final { scan-assembler-not "\\s(?:beq|bne)\\s" } } */ Index: gcc/gcc/testsuite/gcc.target/riscv/adddifgt.c =================================================================== --- /dev/null +++ gcc/gcc/testsuite/gcc.target/riscv/adddifgt.c @@ -0,0 +1,26 @@ +/* { dg-do compile } */ +/* { dg-require-effective-target rv64 } */ +/* { dg-skip-if "" { *-*-* } { "-O0" "-Og" "-Os" "-Oz" } } */ +/* { dg-options "-march=rv64gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -ffinite-math-only -fdump-rtl-ce1" } */ + +typedef int __attribute__ ((mode (DI))) int_t; + +int_t +adddifgt (double w, double x, int_t y, int_t z) +{ + return w > x ? y + z : y; +} + +/* Expect branchless assembly like: + + fgt.d a5,fa0,fa1 + neg a5,a5 + and a5,a5,a1 + add a0,a5,a0 + */ + +/* { dg-final { scan-rtl-dump-times "Conversion succeeded on pass 1\\." 1 "ce1" } } */ +/* { dg-final { scan-rtl-dump-times "if-conversion succeeded through noce_try_addcc" 1 "ce1" } } */ +/* { dg-final { scan-assembler-times "\\s(?:fge\\.d|fgt\\.d|fle\\.d|flt\\.d)\\s" 1 } } */ +/* { dg-final { scan-assembler-not "\\s(?:seqz|snez)\\s" } } */ +/* { dg-final { scan-assembler-not "\\s(?:beq|bne)\\s" } } */ Index: gcc/gcc/testsuite/gcc.target/riscv/adddifle.c =================================================================== --- /dev/null +++ gcc/gcc/testsuite/gcc.target/riscv/adddifle.c @@ -0,0 +1,26 @@ +/* { dg-do compile } */ +/* { dg-require-effective-target rv64 } */ +/* { dg-skip-if "" { *-*-* } { "-O0" "-Og" "-Os" "-Oz" } } */ +/* { dg-options "-march=rv64gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -ffinite-math-only -fdump-rtl-ce1" } */ + +typedef int __attribute__ ((mode (DI))) int_t; + +int_t +adddifle (double w, double x, int_t y, int_t z) +{ + return w <= x ? y + z : y; +} + +/* Expect branchless assembly like: + + fle.d a5,fa0,fa1 + neg a5,a5 + and a5,a5,a1 + add a0,a5,a0 + */ + +/* { dg-final { scan-rtl-dump-times "Conversion succeeded on pass 1\\." 1 "ce1" } } */ +/* { dg-final { scan-rtl-dump-times "if-conversion succeeded through noce_try_addcc" 1 "ce1" } } */ +/* { dg-final { scan-assembler-times "\\s(?:fge\\.d|fgt\\.d|fle\\.d|flt\\.d)\\s" 1 } } */ +/* { dg-final { scan-assembler-not "\\s(?:seqz|snez)\\s" } } */ +/* { dg-final { scan-assembler-not "\\s(?:beq|bne)\\s" } } */ Index: gcc/gcc/testsuite/gcc.target/riscv/adddiflt.c =================================================================== --- /dev/null +++ gcc/gcc/testsuite/gcc.target/riscv/adddiflt.c @@ -0,0 +1,26 @@ +/* { dg-do compile } */ +/* { dg-require-effective-target rv64 } */ +/* { dg-skip-if "" { *-*-* } { "-O0" "-Og" "-Os" "-Oz" } } */ +/* { dg-options "-march=rv64gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -ffinite-math-only -fdump-rtl-ce1" } */ + +typedef int __attribute__ ((mode (DI))) int_t; + +int_t +adddiflt (double w, double x, int_t y, int_t z) +{ + return w < x ? y + z : y; +} + +/* Expect branchless assembly like: + + flt.d a5,fa0,fa1 + neg a5,a5 + and a5,a5,a1 + add a0,a5,a0 + */ + +/* { dg-final { scan-rtl-dump-times "Conversion succeeded on pass 1\\." 1 "ce1" } } */ +/* { dg-final { scan-rtl-dump-times "if-conversion succeeded through noce_try_addcc" 1 "ce1" } } */ +/* { dg-final { scan-assembler-times "\\s(?:fge\\.d|fgt\\.d|fle\\.d|flt\\.d)\\s" 1 } } */ +/* { dg-final { scan-assembler-not "\\s(?:seqz|snez)\\s" } } */ +/* { dg-final { scan-assembler-not "\\s(?:beq|bne)\\s" } } */ Index: gcc/gcc/testsuite/gcc.target/riscv/addsifeq.c =================================================================== --- /dev/null +++ gcc/gcc/testsuite/gcc.target/riscv/addsifeq.c @@ -0,0 +1,26 @@ +/* { dg-do compile } */ +/* { dg-skip-if "" { *-*-* } { "-O0" "-Og" "-Os" "-Oz" } } */ +/* { dg-options "-march=rv32gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -fdump-rtl-ce1" { target { rv32 } } } */ +/* { dg-options "-march=rv64gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -fdump-rtl-ce1" { target { rv64 } } } */ + +typedef int __attribute__ ((mode (SI))) int_t; + +int_t +addsifeq (double w, double x, int_t y, int_t z) +{ + return w == x ? y + z : y; +} + +/* Expect branchless assembly like: + + feq.d a5,fa0,fa1 + neg[w] a5,a5 + and a5,a5,a1 + add[w] a0,a5,a0 + */ + +/* { dg-final { scan-rtl-dump-times "Conversion succeeded on pass 1\\." 1 "ce1" { xfail rv64 } } } */ +/* { dg-final { scan-rtl-dump-times "if-conversion succeeded through noce_try_addcc" 1 "ce1" { xfail rv64 } } } */ +/* { dg-final { scan-assembler-times "\\sfeq\\.d\\s" 1 } } */ +/* { dg-final { scan-assembler-not "\\s(?:seqz|snez)\\s" } } */ +/* { dg-final { scan-assembler-not "\\s(?:beq|bne)\\s" { xfail rv64 } } } */ Index: gcc/gcc/testsuite/gcc.target/riscv/addsifge.c =================================================================== --- /dev/null +++ gcc/gcc/testsuite/gcc.target/riscv/addsifge.c @@ -0,0 +1,26 @@ +/* { dg-do compile } */ +/* { dg-skip-if "" { *-*-* } { "-O0" "-Og" "-Os" "-Oz" } } */ +/* { dg-options "-march=rv32gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -ffinite-math-only -fdump-rtl-ce1" { target { rv32 } } } */ +/* { dg-options "-march=rv64gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -ffinite-math-only -fdump-rtl-ce1" { target { rv64 } } } */ + +typedef int __attribute__ ((mode (SI))) int_t; + +int_t +addsifge (double w, double x, int_t y, int_t z) +{ + return w >= x ? y + z : y; +} + +/* Expect branchless assembly like: + + fge.d a5,fa0,fa1 + neg[w] a5,a5 + and a5,a5,a1 + add[w] a0,a5,a0 + */ + +/* { /* { dg-final { scan-rtl-dump-times "Conversion succeeded on pass 1\\." 1 "ce1" { xfail rv64 } } } */ +/* { dg-final { scan-rtl-dump-times "if-conversion succeeded through noce_try_addcc" 1 "ce1" { xfail rv64 } } } */ +/* { dg-final { scan-assembler-times "\\s(?:fge\\.d|fgt\\.d|fle\\.d|flt\\.d)\\s" 1 } } */ +/* { dg-final { scan-assembler-not "\\s(?:seqz|snez)\\s" } } */ +/* { dg-final { scan-assembler-not "\\s(?:beq|bne)\\s" { xfail rv64 } } } */ Index: gcc/gcc/testsuite/gcc.target/riscv/addsifgt.c =================================================================== --- /dev/null +++ gcc/gcc/testsuite/gcc.target/riscv/addsifgt.c @@ -0,0 +1,26 @@ +/* { dg-do compile } */ +/* { dg-skip-if "" { *-*-* } { "-O0" "-Og" "-Os" "-Oz" } } */ +/* { dg-options "-march=rv32gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -ffinite-math-only -fdump-rtl-ce1" { target { rv32 } } } */ +/* { dg-options "-march=rv64gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -ffinite-math-only -fdump-rtl-ce1" { target { rv64 } } } */ + +typedef int __attribute__ ((mode (SI))) int_t; + +int_t +addsifgt (double w, double x, int_t y, int_t z) +{ + return w > x ? y + z : y; +} + +/* Expect branchless assembly like: + + fgt.d a5,fa0,fa1 + neg[w] a5,a5 + and a5,a5,a1 + add[w] a0,a5,a0 + */ + +/* { /* { dg-final { scan-rtl-dump-times "Conversion succeeded on pass 1\\." 1 "ce1" { xfail rv64 } } } */ +/* { dg-final { scan-rtl-dump-times "if-conversion succeeded through noce_try_addcc" 1 "ce1" { xfail rv64 } } } */ +/* { dg-final { scan-assembler-times "\\s(?:fge\\.d|fgt\\.d|fle\\.d|flt\\.d)\\s" 1 } } */ +/* { dg-final { scan-assembler-not "\\s(?:seqz|snez)\\s" } } */ +/* { dg-final { scan-assembler-not "\\s(?:beq|bne)\\s" { xfail rv64 } } } */ Index: gcc/gcc/testsuite/gcc.target/riscv/addsifle.c =================================================================== --- /dev/null +++ gcc/gcc/testsuite/gcc.target/riscv/addsifle.c @@ -0,0 +1,26 @@ +/* { dg-do compile } */ +/* { dg-skip-if "" { *-*-* } { "-O0" "-Og" "-Os" "-Oz" } } */ +/* { dg-options "-march=rv32gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -ffinite-math-only -fdump-rtl-ce1" { target { rv32 } } } */ +/* { dg-options "-march=rv64gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -ffinite-math-only -fdump-rtl-ce1" { target { rv64 } } } */ + +typedef int __attribute__ ((mode (SI))) int_t; + +int_t +addsifle (double w, double x, int_t y, int_t z) +{ + return w <= x ? y + z : y; +} + +/* Expect branchless assembly like: + + fle.d a5,fa0,fa1 + neg[w] a5,a5 + and a5,a5,a1 + add[w] a0,a5,a0 + */ + +/* { /* { dg-final { scan-rtl-dump-times "Conversion succeeded on pass 1\\." 1 "ce1" { xfail rv64 } } } */ +/* { dg-final { scan-rtl-dump-times "if-conversion succeeded through noce_try_addcc" 1 "ce1" { xfail rv64 } } } */ +/* { dg-final { scan-assembler-times "\\s(?:fge\\.d|fgt\\.d|fle\\.d|flt\\.d)\\s" 1 } } */ +/* { dg-final { scan-assembler-not "\\s(?:seqz|snez)\\s" } } */ +/* { dg-final { scan-assembler-not "\\s(?:beq|bne)\\s" { xfail rv64 } } } */ Index: gcc/gcc/testsuite/gcc.target/riscv/addsiflt.c =================================================================== --- /dev/null +++ gcc/gcc/testsuite/gcc.target/riscv/addsiflt.c @@ -0,0 +1,26 @@ +/* { dg-do compile } */ +/* { dg-skip-if "" { *-*-* } { "-O0" "-Og" "-Os" "-Oz" } } */ +/* { dg-options "-march=rv32gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -ffinite-math-only -fdump-rtl-ce1" { target { rv32 } } } */ +/* { dg-options "-march=rv64gc -mtune=sifive-5-series -mbranch-cost=3 -mmovcc -ffinite-math-only -fdump-rtl-ce1" { target { rv64 } } } */ + +typedef int __attribute__ ((mode (SI))) int_t; + +int_t +addsiflt (double w, double x, int_t y, int_t z) +{ + return w < x ? y + z : y; +} + +/* Expect branchless assembly like: + + flt.d a5,fa0,fa1 + neg[w] a5,a5 + and a5,a5,a1 + add[w] a0,a5,a0 + */ + +/* { /* { dg-final { scan-rtl-dump-times "Conversion succeeded on pass 1\\." 1 "ce1" { xfail rv64 } } } */ +/* { dg-final { scan-rtl-dump-times "if-conversion succeeded through noce_try_addcc" 1 "ce1" { xfail rv64 } } } */ +/* { dg-final { scan-assembler-times "\\s(?:fge\\.d|fgt\\.d|fle\\.d|flt\\.d)\\s" 1 } } */ +/* { dg-final { scan-assembler-not "\\s(?:seqz|snez)\\s" } } */ +/* { dg-final { scan-assembler-not "\\s(?:beq|bne)\\s" { xfail rv64 } } } */