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x64: special case 0 to use xor in Inst::gen_constant for i128s

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This commit is contained in:
Nick Fitzgerald
2021-11-10 15:57:58 -08:00
parent b5105c025c
commit 33fcd6b4a5
2 changed files with 30 additions and 16 deletions
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12
cranelift/filetests/filetests/isa/x64/i128.clif
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@@ -702,10 +702,10 @@ block2(v6: i128):
; nextln: testb $$1, %dl
; nextln: jnz label1; j label2
; check: Block 1:
; check: movl $$0, %edi
; nextln: movl $$0, %esi
; check: xorq %rdi, %rdi
; nextln: xorq %rsi, %rsi
; nextln: movl $$1, %ecx
; nextln: movl $$0, %eax
; nextln: xorq %rax, %rax
; nextln: addq %rcx, %rdi
; nextln: adcq %rax, %rsi
; nextln: movq %rdi, %rax
@@ -714,10 +714,10 @@ block2(v6: i128):
; nextln: popq %rbp
; nextln: ret
; check: Block 2:
; check: movl $$0, %edi
; nextln: movl $$0, %esi
; check: xorq %rdi, %rdi
; nextln: xorq %rsi, %rsi
; nextln: movl $$2, %ecx
; nextln: movl $$0, %eax
; nextln: xorq %rax, %rax
; nextln: addq %rcx, %rdi
; nextln: adcq %rax, %rsi
; nextln: movq %rdi, %rax