derek.holloway
7502bf64a4
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233 lines
6.7 KiB
LLVM
233 lines
6.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; Check that 32-bit division is bypassed correctly.
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; RUN: llc < %s -mattr=+idivl-to-divb -mtriple=i686-linux | FileCheck %s
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define i32 @Test_get_quotient(i32 %a, i32 %b) nounwind {
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; CHECK-LABEL: Test_get_quotient:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: movl %eax, %edx
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; CHECK-NEXT: orl %ecx, %edx
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; CHECK-NEXT: testl $-256, %edx
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; CHECK-NEXT: je .LBB0_1
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; CHECK-NEXT: # %bb.2:
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; CHECK-NEXT: cltd
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; CHECK-NEXT: idivl %ecx
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; CHECK-NEXT: retl
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; CHECK-NEXT: .LBB0_1:
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; CHECK-NEXT: movzbl %al, %eax
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; CHECK-NEXT: divb %cl
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; CHECK-NEXT: movzbl %al, %eax
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; CHECK-NEXT: retl
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%result = sdiv i32 %a, %b
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ret i32 %result
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}
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define i32 @Test_get_remainder(i32 %a, i32 %b) nounwind {
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; CHECK-LABEL: Test_get_remainder:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: movl %eax, %edx
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; CHECK-NEXT: orl %ecx, %edx
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; CHECK-NEXT: testl $-256, %edx
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; CHECK-NEXT: je .LBB1_1
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; CHECK-NEXT: # %bb.2:
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; CHECK-NEXT: cltd
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; CHECK-NEXT: idivl %ecx
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; CHECK-NEXT: movl %edx, %eax
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; CHECK-NEXT: retl
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; CHECK-NEXT: .LBB1_1:
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; CHECK-NEXT: movzbl %al, %eax
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; CHECK-NEXT: divb %cl
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; CHECK-NEXT: movzbl %ah, %eax
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; CHECK-NEXT: retl
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%result = srem i32 %a, %b
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ret i32 %result
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}
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define i32 @Test_get_quotient_and_remainder(i32 %a, i32 %b) nounwind {
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; CHECK-LABEL: Test_get_quotient_and_remainder:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: movl %eax, %edx
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; CHECK-NEXT: orl %ecx, %edx
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; CHECK-NEXT: testl $-256, %edx
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; CHECK-NEXT: je .LBB2_1
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; CHECK-NEXT: # %bb.2:
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; CHECK-NEXT: cltd
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; CHECK-NEXT: idivl %ecx
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; CHECK-NEXT: addl %edx, %eax
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; CHECK-NEXT: retl
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; CHECK-NEXT: .LBB2_1:
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; CHECK-NEXT: movzbl %al, %eax
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; CHECK-NEXT: divb %cl
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; CHECK-NEXT: movzbl %ah, %edx
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; CHECK-NEXT: movzbl %al, %eax
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; CHECK-NEXT: addl %edx, %eax
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; CHECK-NEXT: retl
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%resultdiv = sdiv i32 %a, %b
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%resultrem = srem i32 %a, %b
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%result = add i32 %resultdiv, %resultrem
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ret i32 %result
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}
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define i32 @Test_use_div_and_idiv(i32 %a, i32 %b) nounwind {
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; CHECK-LABEL: Test_use_div_and_idiv:
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; CHECK: # %bb.0:
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; CHECK-NEXT: pushl %ebx
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; CHECK-NEXT: pushl %edi
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; CHECK-NEXT: pushl %esi
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ebx
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; CHECK-NEXT: movl %ecx, %edi
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; CHECK-NEXT: orl %ebx, %edi
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; CHECK-NEXT: testl $-256, %edi
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; CHECK-NEXT: je .LBB3_1
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; CHECK-NEXT: # %bb.2:
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; CHECK-NEXT: movl %ecx, %eax
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; CHECK-NEXT: cltd
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; CHECK-NEXT: idivl %ebx
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; CHECK-NEXT: movl %eax, %esi
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; CHECK-NEXT: testl $-256, %edi
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; CHECK-NEXT: je .LBB3_4
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; CHECK-NEXT: .LBB3_5:
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; CHECK-NEXT: movl %ecx, %eax
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; CHECK-NEXT: xorl %edx, %edx
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; CHECK-NEXT: divl %ebx
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; CHECK-NEXT: jmp .LBB3_6
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; CHECK-NEXT: .LBB3_1:
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; CHECK-NEXT: movzbl %cl, %eax
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; CHECK-NEXT: divb %bl
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; CHECK-NEXT: movzbl %al, %esi
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; CHECK-NEXT: testl $-256, %edi
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; CHECK-NEXT: jne .LBB3_5
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; CHECK-NEXT: .LBB3_4:
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; CHECK-NEXT: movzbl %cl, %eax
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; CHECK-NEXT: divb %bl
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; CHECK-NEXT: movzbl %al, %eax
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; CHECK-NEXT: .LBB3_6:
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; CHECK-NEXT: addl %eax, %esi
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; CHECK-NEXT: movl %esi, %eax
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; CHECK-NEXT: popl %esi
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; CHECK-NEXT: popl %edi
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; CHECK-NEXT: popl %ebx
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; CHECK-NEXT: retl
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%resultidiv = sdiv i32 %a, %b
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%resultdiv = udiv i32 %a, %b
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%result = add i32 %resultidiv, %resultdiv
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ret i32 %result
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}
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define i32 @Test_use_div_imm_imm() nounwind {
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; CHECK-LABEL: Test_use_div_imm_imm:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl $64, %eax
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; CHECK-NEXT: retl
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%resultdiv = sdiv i32 256, 4
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ret i32 %resultdiv
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}
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define i32 @Test_use_div_reg_imm(i32 %a) nounwind {
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; CHECK-LABEL: Test_use_div_reg_imm:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl $1041204193, %eax # imm = 0x3E0F83E1
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; CHECK-NEXT: imull {{[0-9]+}}(%esp)
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; CHECK-NEXT: movl %edx, %eax
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; CHECK-NEXT: shrl $31, %eax
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; CHECK-NEXT: sarl $3, %edx
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; CHECK-NEXT: addl %edx, %eax
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; CHECK-NEXT: retl
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%resultdiv = sdiv i32 %a, 33
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ret i32 %resultdiv
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}
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define i32 @Test_use_rem_reg_imm(i32 %a) nounwind {
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; CHECK-LABEL: Test_use_rem_reg_imm:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; CHECK-NEXT: movl $1041204193, %edx # imm = 0x3E0F83E1
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; CHECK-NEXT: movl %ecx, %eax
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; CHECK-NEXT: imull %edx
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; CHECK-NEXT: movl %edx, %eax
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; CHECK-NEXT: shrl $31, %eax
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; CHECK-NEXT: sarl $3, %edx
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; CHECK-NEXT: addl %eax, %edx
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; CHECK-NEXT: movl %edx, %eax
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; CHECK-NEXT: shll $5, %eax
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; CHECK-NEXT: addl %edx, %eax
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; CHECK-NEXT: subl %eax, %ecx
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; CHECK-NEXT: movl %ecx, %eax
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; CHECK-NEXT: retl
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%resultrem = srem i32 %a, 33
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ret i32 %resultrem
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}
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define i32 @Test_use_divrem_reg_imm(i32 %a) nounwind {
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; CHECK-LABEL: Test_use_divrem_reg_imm:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; CHECK-NEXT: movl $1041204193, %edx # imm = 0x3E0F83E1
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; CHECK-NEXT: movl %ecx, %eax
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; CHECK-NEXT: imull %edx
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; CHECK-NEXT: movl %edx, %eax
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; CHECK-NEXT: shrl $31, %eax
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; CHECK-NEXT: sarl $3, %edx
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; CHECK-NEXT: addl %edx, %eax
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; CHECK-NEXT: movl %eax, %edx
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; CHECK-NEXT: shll $5, %edx
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; CHECK-NEXT: addl %eax, %edx
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; CHECK-NEXT: subl %edx, %ecx
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; CHECK-NEXT: addl %eax, %ecx
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; CHECK-NEXT: movl %ecx, %eax
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; CHECK-NEXT: retl
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%resultdiv = sdiv i32 %a, 33
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%resultrem = srem i32 %a, 33
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%result = add i32 %resultdiv, %resultrem
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ret i32 %result
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}
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define i32 @Test_use_div_imm_reg(i32 %a) nounwind {
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; CHECK-LABEL: Test_use_div_imm_reg:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; CHECK-NEXT: testl $-256, %ecx
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; CHECK-NEXT: je .LBB8_1
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; CHECK-NEXT: # %bb.2:
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; CHECK-NEXT: movl $4, %eax
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; CHECK-NEXT: xorl %edx, %edx
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; CHECK-NEXT: idivl %ecx
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; CHECK-NEXT: retl
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; CHECK-NEXT: .LBB8_1:
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; CHECK-NEXT: movb $4, %al
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; CHECK-NEXT: movzbl %al, %eax
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; CHECK-NEXT: divb %cl
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; CHECK-NEXT: movzbl %al, %eax
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; CHECK-NEXT: retl
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%resultdiv = sdiv i32 4, %a
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ret i32 %resultdiv
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}
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define i32 @Test_use_rem_imm_reg(i32 %a) nounwind {
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; CHECK-LABEL: Test_use_rem_imm_reg:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; CHECK-NEXT: testl $-256, %ecx
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; CHECK-NEXT: je .LBB9_1
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; CHECK-NEXT: # %bb.2:
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; CHECK-NEXT: movl $4, %eax
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; CHECK-NEXT: xorl %edx, %edx
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; CHECK-NEXT: idivl %ecx
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; CHECK-NEXT: retl
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; CHECK-NEXT: .LBB9_1:
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; CHECK-NEXT: movb $4, %al
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; CHECK-NEXT: movzbl %al, %eax
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; CHECK-NEXT: divb %cl
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; CHECK-NEXT: movzbl %al, %eax
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; CHECK-NEXT: retl
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%resultdiv = sdiv i32 4, %a
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ret i32 %resultdiv
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}
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