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x64: fix CvtFloatToUintSeq: do not clobber src. (#4842)

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This slipped through the regalloc2 operand code update in #4811: the
CvtFloatToUintSeq pseudo-instruction actually clobbers its source. It
was marked as a "mod" operand in the original and I mistakenly
converted it to a "use" as I had not seen the actual clobber. The
instruction now takes an extra temp and makes a copy of `src` in the
appropriate place.

Fixes #4840.
This commit is contained in:
Chris Fallin
2022-09-01 15:46:57 -07:00
committed by GitHub
parent 08e7a7f1a0
commit 385bd0cbf8
5 changed files with 51 additions and 17 deletions
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18
cranelift/codegen/src/isa/x64/inst/mod.rs
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@@ -1179,14 +1179,16 @@ impl PrettyPrint for Inst {
dst_size,
tmp_gpr,
tmp_xmm,
tmp_xmm2,
is_saturating,
} => {
let src = pretty_print_reg(src.to_reg(), src_size.to_bytes(), allocs);
let dst = pretty_print_reg(dst.to_reg().to_reg(), dst_size.to_bytes(), allocs);
let tmp_gpr = pretty_print_reg(tmp_gpr.to_reg().to_reg(), 8, allocs);
let tmp_xmm = pretty_print_reg(tmp_xmm.to_reg().to_reg(), 8, allocs);
let tmp_xmm2 = pretty_print_reg(tmp_xmm2.to_reg().to_reg(), 8, allocs);
format!(
"{} {}, {}, {}, {}",
"{} {}, {}, {}, {}, {}",
ljustify(format!(
"cvt_float{}_to_uint{}{}_seq",
src_size.to_bits(),
@@ -1197,6 +1199,7 @@ impl PrettyPrint for Inst {
dst,
tmp_gpr,
tmp_xmm,
tmp_xmm2,
)
}
@@ -1876,7 +1879,7 @@ fn x64_get_operands<F: Fn(VReg) -> VReg>(inst: &Inst, collector: &mut OperandCol
..
} => {
collector.reg_use(src.to_reg());
collector.reg_def(dst.to_writable_reg());
collector.reg_early_def(dst.to_writable_reg());
collector.reg_early_def(tmp_gpr1.to_writable_reg());
collector.reg_early_def(tmp_gpr2.to_writable_reg());
}
@@ -1886,18 +1889,25 @@ fn x64_get_operands<F: Fn(VReg) -> VReg>(inst: &Inst, collector: &mut OperandCol
tmp_xmm,
tmp_gpr,
..
} => {
collector.reg_use(src.to_reg());
collector.reg_early_def(dst.to_writable_reg());
collector.reg_early_def(tmp_gpr.to_writable_reg());
collector.reg_early_def(tmp_xmm.to_writable_reg());
}
| Inst::CvtFloatToUintSeq {
Inst::CvtFloatToUintSeq {
src,
dst,
tmp_gpr,
tmp_xmm,
tmp_xmm2,
..
} => {
collector.reg_use(src.to_reg());
collector.reg_def(dst.to_writable_reg());
collector.reg_early_def(dst.to_writable_reg());
collector.reg_early_def(tmp_gpr.to_writable_reg());
collector.reg_early_def(tmp_xmm.to_writable_reg());
collector.reg_early_def(tmp_xmm2.to_writable_reg());
}
Inst::MovzxRmR { src, dst, .. } => {
collector.reg_def(dst.to_writable_reg());