bjoernager/rust
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asm: Allow the use of r8-r14 as clobbers on Thumb1

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Previously these were entirely disallowed, except for r11 which was
allowed by accident.
This commit is contained in:
Amanieu d'Antras 2022-02-10 20:50:16 +00:00
parent 930fc4f59d
commit 11250b8661
7 changed files with 97 additions and 46 deletions
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11
compiler/rustc_ast_lowering/src/asm.rs
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@ -129,13 +129,14 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
.operands
.iter()
.map(|(op, op_sp)| {
let lower_reg = |reg| match reg {
let lower_reg = |reg, is_clobber| match reg {
InlineAsmRegOrRegClass::Reg(s) => {
asm::InlineAsmRegOrRegClass::Reg(if let Some(asm_arch) = asm_arch {
asm::InlineAsmReg::parse(
asm_arch,
&sess.target_features,
&sess.target,
is_clobber,
s,
)
.unwrap_or_else(|e| {
@ -162,24 +163,24 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
let op = match *op {
InlineAsmOperand::In { reg, ref expr } => hir::InlineAsmOperand::In {
reg: lower_reg(reg),
reg: lower_reg(reg, false),
expr: self.lower_expr_mut(expr),
},
InlineAsmOperand::Out { reg, late, ref expr } => hir::InlineAsmOperand::Out {
reg: lower_reg(reg),
reg: lower_reg(reg, expr.is_none()),
late,
expr: expr.as_ref().map(|expr| self.lower_expr_mut(expr)),
},
InlineAsmOperand::InOut { reg, late, ref expr } => {
hir::InlineAsmOperand::InOut {
reg: lower_reg(reg),
reg: lower_reg(reg, false),
late,
expr: self.lower_expr_mut(expr),
}
}
InlineAsmOperand::SplitInOut { reg, late, ref in_expr, ref out_expr } => {
hir::InlineAsmOperand::SplitInOut {
reg: lower_reg(reg),
reg: lower_reg(reg, false),
late,
in_expr: self.lower_expr_mut(in_expr),
out_expr: out_expr.as_ref().map(|expr| self.lower_expr_mut(expr)),