derek.holloway
7502bf64a4
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102 lines
2.5 KiB
LLVM
102 lines
2.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s --check-prefix=LNX
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; RUN: llc < %s -mtriple=x86_64-win32 | FileCheck %s --check-prefix=WIN
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; Reuse the flags value from the add instructions instead of emitting separate
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; testl instructions.
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; Use the flags on the add.
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define i32 @test1(ptr %x, i32 %y, i32 %a, i32 %b) nounwind {
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; LNX-LABEL: test1:
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; LNX: # %bb.0:
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; LNX-NEXT: movl %edx, %eax
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; LNX-NEXT: addl (%rdi), %esi
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; LNX-NEXT: cmovnsl %ecx, %eax
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; LNX-NEXT: retq
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;
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; WIN-LABEL: test1:
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; WIN: # %bb.0:
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; WIN-NEXT: movl %r8d, %eax
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; WIN-NEXT: addl (%rcx), %edx
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; WIN-NEXT: cmovnsl %r9d, %eax
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; WIN-NEXT: retq
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%tmp2 = load i32, ptr %x, align 4 ; <i32> [#uses=1]
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%tmp4 = add i32 %tmp2, %y ; <i32> [#uses=1]
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%tmp5 = icmp slt i32 %tmp4, 0 ; <i1> [#uses=1]
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%tmp.0 = select i1 %tmp5, i32 %a, i32 %b ; <i32> [#uses=1]
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ret i32 %tmp.0
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}
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declare void @foo(i32)
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; Don't use the flags result of the and here, since the and has no
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; other use. A simple test is better.
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define void @test2(i32 %x) nounwind {
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; LNX-LABEL: test2:
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; LNX: # %bb.0:
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; LNX-NEXT: testb $16, %dil
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; LNX-NEXT: jne .LBB1_2
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; LNX-NEXT: # %bb.1: # %true
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; LNX-NEXT: pushq %rax
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; LNX-NEXT: callq foo@PLT
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; LNX-NEXT: popq %rax
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; LNX-NEXT: .LBB1_2: # %false
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; LNX-NEXT: retq
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;
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; WIN-LABEL: test2:
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; WIN: # %bb.0:
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; WIN-NEXT: subq $40, %rsp
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; WIN-NEXT: testb $16, %cl
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; WIN-NEXT: jne .LBB1_2
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; WIN-NEXT: # %bb.1: # %true
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; WIN-NEXT: callq foo
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; WIN-NEXT: .LBB1_2: # %false
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; WIN-NEXT: addq $40, %rsp
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; WIN-NEXT: retq
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%y = and i32 %x, 16
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%t = icmp eq i32 %y, 0
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br i1 %t, label %true, label %false
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true:
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call void @foo(i32 %x)
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ret void
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false:
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ret void
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}
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; Do use the flags result of the and here, since the and has another use.
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define void @test3(i32 %x) nounwind {
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; LNX-LABEL: test3:
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; LNX: # %bb.0:
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; LNX-NEXT: andl $16, %edi
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; LNX-NEXT: jne .LBB2_2
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; LNX-NEXT: # %bb.1: # %true
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; LNX-NEXT: pushq %rax
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; LNX-NEXT: callq foo@PLT
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; LNX-NEXT: popq %rax
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; LNX-NEXT: .LBB2_2: # %false
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; LNX-NEXT: retq
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;
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; WIN-LABEL: test3:
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; WIN: # %bb.0:
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; WIN-NEXT: subq $40, %rsp
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; WIN-NEXT: andl $16, %ecx
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; WIN-NEXT: jne .LBB2_2
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; WIN-NEXT: # %bb.1: # %true
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; WIN-NEXT: callq foo
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; WIN-NEXT: .LBB2_2: # %false
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; WIN-NEXT: addq $40, %rsp
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; WIN-NEXT: retq
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%y = and i32 %x, 16
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%t = icmp eq i32 %y, 0
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br i1 %t, label %true, label %false
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true:
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call void @foo(i32 %y)
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ret void
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false:
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ret void
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}
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