533f1c8d8b
The failure to mask the amount triggered a panic due to a subtraction overflow check; see https://bugzilla.mozilla.org/show_bug.cgi?id=1649432. Attempting to shift by an out-of-range amount should be defined to shift by an amount mod the operand size (i.e., masked to 5 bits for 32-bit shifts, or 6 bits for 64-bit shifts).
32 lines
556 B
Plaintext
32 lines
556 B
Plaintext
test compile
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target aarch64
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function %f(i64) -> i64 {
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block0(v0: i64):
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v1 = iconst.i64 3
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v2 = ishl.i64 v0, v1
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v3 = iadd.i64 v0, v2
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return v3
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}
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; check: stp fp, lr, [sp, #-16]!
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; nextln: mov fp, sp
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; nextln: add x0, x0, x0, LSL 3
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; nextln: mov sp, fp
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; nextln: ldp fp, lr, [sp], #16
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; nextln: ret
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function %f(i32) -> i32 {
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block0(v0: i32):
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v1 = iconst.i32 53
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v2 = ishl.i32 v0, v1
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return v2
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}
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; check: stp fp, lr, [sp, #-16]!
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; nextln: mov fp, sp
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; nextln: lsl w0, w0, #21
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; nextln: mov sp, fp
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; nextln: ldp fp, lr, [sp], #16
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; nextln: ret
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