ffbbfbffce
This rewrite was introduced in #5676 and then reverted in #5682 due to a footgun
where we accidentally weren't actually checking the `y == !z` precondition. This
commit fixes the precondition check. It also fixes the arithmetic to be
correctly masked to the value type's width.
This reverts commit 268f6bfc1d.
35 lines
918 B
Plaintext
35 lines
918 B
Plaintext
;; Test the rewrite: `or(and(x, y), not(y)) => or(x, not(y))`
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test interpret
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test run
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target aarch64
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target x86_64
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target riscv64
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target s390x
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function %or_and_y_with_not_y(i8, i8) -> i8 {
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block0(v0: i8, v1: i8):
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v2 = band v0, v1
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v3 = bnot v1
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v4 = bor v2, v3
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return v4
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}
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; run: %or_and_y_with_not_y(0xff, 0x0a) == 0xff
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; run: %or_and_y_with_not_y(0xff, 0xb0) == 0xff
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; run: %or_and_y_with_not_y(0xaa, 0x0a) == 0xff
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; run: %or_and_y_with_not_y(0xaa, 0xb0) == 0xef
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; run: %or_and_y_with_not_y(0x00, 0x0a) == 0xf5
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; run: %or_and_y_with_not_y(0x00, 0xb0) == 0x4f
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function %or_and_constant_with_not_constant(i8) -> i8 {
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block0(v0: i8):
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v1 = iconst.i8 -4
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v2 = band v0, v1
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v3 = iconst.i8 3
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v4 = bor v2, v3
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return v4
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}
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; run: %or_and_constant_with_not_constant(0xff) == 0xff
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; run: %or_and_constant_with_not_constant(0xaa) == 0xab
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; run: %or_and_constant_with_not_constant(0x00) == 0x03
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