Cranelift: i128 bit shifts not working on x86_64

[afonso360]

👋 Hey,

This issue is mostly to track the filetests/filetests/runtests/i128-shifts-small-types.clif file. We have these cases disabled on x86_64 since they are broken.

.clif Test Case

function %ishl_i16_i128(i16, i128) -> i16 {
block0(v0: i16, v1: i128):
    v2 = ishl.i16 v0, v1
    return v2
}
; run: %ishl_i16_i128(0x0004, 16) == 0x0004

Steps to Reproduce

clif-util test ./the-above.clif

Expected Results

The test to pass

Actual Results

 ERROR cranelift_filetests::concurrent > FAIL: run
FAIL .\filetests\filetests\runtests\i128-shifts-small-types.clif: run

Caused by:
    Failed test: run: %ishl_i16_i128(4, 16) == 4, actual: 0
1 tests

Versions and Environment

Cranelift version or commit: main
Operating system: Windows
Architecture: x86_64