697246658d
The legalizer often splits values into parts with the vsplit and isplit_lohi instructions. Avoid doing that for values that are already defined by the corresponding concatenation instructions. This reduces the number of instructions created during legalization, and it simplifies later optimizations. A number of dead concatenation instructions are left behind. They can be trivially cleaned up by a dead code elimination pass.
65 lines
1.8 KiB
Plaintext
65 lines
1.8 KiB
Plaintext
; Test the legalization of i64 arithmetic instructions.
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test legalizer
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isa riscv supports_m=1
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; regex: V=vx?\d+
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function bitwise_and(i64, i64) -> i64 {
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ebb0(v1: i64, v2: i64):
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v3 = band v1, v2
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return v3
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}
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; check: $ebb0($(v1l=$V): i32, $(v1h=$V): i32, $(v2l=$V): i32, $(v2h=$V): i32):
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; check: [R#ec
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; sameln: $(v3l=$V) = band $v1l, $v2l
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; check: [R#ec
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; sameln: $(v3h=$V) = band $v1h, $v2h
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; check: $v3 = iconcat $v3l, $v3h
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; check: return $v3l, $v3h
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function bitwise_or(i64, i64) -> i64 {
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ebb0(v1: i64, v2: i64):
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v3 = bor v1, v2
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return v3
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}
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; check: $ebb0($(v1l=$V): i32, $(v1h=$V): i32, $(v2l=$V): i32, $(v2h=$V): i32):
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; check: [R#cc
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; sameln: $(v3l=$V) = bor $v1l, $v2l
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; check: [R#cc
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; sameln: $(v3h=$V) = bor $v1h, $v2h
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; check: $v3 = iconcat $v3l, $v3h
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; check: return $v3l, $v3h
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function bitwise_xor(i64, i64) -> i64 {
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ebb0(v1: i64, v2: i64):
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v3 = bxor v1, v2
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return v3
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}
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; check: $ebb0($(v1l=$V): i32, $(v1h=$V): i32, $(v2l=$V): i32, $(v2h=$V): i32):
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; check: [R#8c
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; sameln: $(v3l=$V) = bxor $v1l, $v2l
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; check: [R#8c
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; sameln: $(v3h=$V) = bxor $v1h, $v2h
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; check: $v3 = iconcat $v3l, $v3h
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; check: return $v3l, $v3h
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function arith_add(i64, i64) -> i64 {
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; Legalizing iadd.i64 requires two steps:
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; 1. Narrow to iadd_cout.i32, then
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; 2. Expand iadd_cout.i32 since RISC-V has no carry flag.
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ebb0(v1: i64, v2: i64):
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v3 = iadd v1, v2
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return v3
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}
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; check: $ebb0($(v1l=$V): i32, $(v1h=$V): i32, $(v2l=$V): i32, $(v2h=$V): i32):
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; check: [R#0c
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; sameln: $(v3l=$V) = iadd $v1l, $v2l
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; check: $(c=$V) = icmp ult, $v3l, $v1l
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; check: [R#0c
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; sameln: $(v3h1=$V) = iadd $v1h, $v2h
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; TODO: This doesn't typecheck. We need to convert the b1 result to i32.
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; check: [R#0c
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; sameln: $(v3h=$V) = iadd $v3h1, $c
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; check: $v3 = iconcat $v3l, $v3h
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; check: return $v3l, $v3h
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