diff options
| author | Richard Sandiford <richard.sandiford@arm.com> | 2025-01-20 19:52:31 +0000 |
|---|---|---|
| committer | Richard Sandiford <richard.sandiford@arm.com> | 2025-01-20 19:52:31 +0000 |
| commit | 6612b8e55471fabd2071a9637a06d3ffce2b05a6 (patch) | |
| tree | c456fdd667754bb0068adc752005bbc15d7778e3 /gcc | |
| parent | 1b8820421488d220a95f651b51175d618063c48c (diff) | |
| download | gcc-6612b8e55471fabd2071a9637a06d3ffce2b05a6.zip gcc-6612b8e55471fabd2071a9637a06d3ffce2b05a6.tar.gz gcc-6612b8e55471fabd2071a9637a06d3ffce2b05a6.tar.bz2 | |
aarch64: Fix invalid subregs in xorsign [PR118501]
In the testcase, we try to use xorsign on:
(subreg:DF (reg:TI R) 8)
i.e. the highpart of the TI. xorsign wants to take a V2DF
paradoxical subreg of this, which is rightly rejected as a direct
operation. In cases like this, we need to force the highpart into
a fresh register first.
gcc/
PR target/118501
* config/aarch64/aarch64.md (@xorsign<mode>3): Use
force_lowpart_subreg.
gcc/testsuite/
PR target/118501
* gcc.c-torture/compile/pr118501.c: New test.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/aarch64/aarch64.md | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/pr118501.c | 6 |
2 files changed, 8 insertions, 2 deletions
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md index 1b67ccc..f8d82ce 100644 --- a/gcc/config/aarch64/aarch64.md +++ b/gcc/config/aarch64/aarch64.md @@ -7476,8 +7476,8 @@ "TARGET_SIMD" { rtx tmp = gen_reg_rtx (<VCONQ>mode); - rtx op1 = lowpart_subreg (<VCONQ>mode, operands[1], <MODE>mode); - rtx op2 = lowpart_subreg (<VCONQ>mode, operands[2], <MODE>mode); + rtx op1 = force_lowpart_subreg (<VCONQ>mode, operands[1], <MODE>mode); + rtx op2 = force_lowpart_subreg (<VCONQ>mode, operands[2], <MODE>mode); emit_insn (gen_xorsign3 (<VCONQ>mode, tmp, op1, op2)); emit_move_insn (operands[0], lowpart_subreg (<MODE>mode, tmp, <VCONQ>mode)); diff --git a/gcc/testsuite/gcc.c-torture/compile/pr118501.c b/gcc/testsuite/gcc.c-torture/compile/pr118501.c new file mode 100644 index 0000000..064b762 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/pr118501.c @@ -0,0 +1,6 @@ +struct s1 { + double data[2]; +}; +double h(double t, struct s1 z_) { + return z_.data[1] * __builtin_copysign(1.0, t); +} |