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x64: fix miscompilation of select.i128 (#4017)

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Issue #3963 identified a miscompilation with select in which the second
in the pair of `CMOV`s (one pair per `i128` register) used the wrong
flag. This change fixes the error in the x64 ISLE helper function
emitting these `CMOV` instructions.
This commit is contained in:
Andrew Brown
2022-04-12 09:56:57 -07:00
committed by GitHub
parent 54aa720506
commit 7a55779c6b
5 changed files with 42 additions and 6 deletions
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4
cranelift/codegen/src/isa/x64/lower/isle/generated_code.rs generated
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@@ -2636,7 +2636,7 @@ pub fn constructor_cmove_or_from_values<C: Context>(
let expr16_0 = C::writable_gpr_to_gpr(ctx, expr4_0);
let expr17_0 = MInst::Cmove {
size: expr6_0,
cc: pattern2_0.clone(),
cc: pattern3_0.clone(),
consequent: expr15_0,
alternative: expr16_0,
dst: expr2_0,
@@ -2659,7 +2659,7 @@ pub fn constructor_cmove_or_from_values<C: Context>(
let expr27_0 = C::writable_gpr_to_gpr(ctx, expr5_0);
let expr28_0 = MInst::Cmove {
size: expr6_0,
cc: pattern2_0.clone(),
cc: pattern3_0.clone(),
consequent: expr26_0,
alternative: expr27_0,
dst: expr3_0,