derek.holloway
7502bf64a4
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69 lines
2.2 KiB
LLVM
69 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -o - %s | FileCheck %s
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target triple = "x86_64-unknown-unknown"
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; select with and i1/or i1 condition should be implemented as a series of 2
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; cmovs, not by producing two conditions and using and on them.
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define dso_local i32 @select_and(i32 %a0, i32 %a1, float %a2, float %a3, i32 %a4, i32 %a5) {
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; CHECK-LABEL: select_and:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl %edx, %eax
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; CHECK-NEXT: ucomiss %xmm0, %xmm1
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; CHECK-NEXT: cmovbel %ecx, %eax
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; CHECK-NEXT: cmpl %esi, %edi
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; CHECK-NEXT: cmovael %ecx, %eax
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; CHECK-NEXT: retq
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%cmp0 = icmp ult i32 %a0, %a1
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%cmp1 = fcmp olt float %a2, %a3
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%and = and i1 %cmp0, %cmp1
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%res = select i1 %and, i32 %a4, i32 %a5
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ret i32 %res
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}
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; select with and i1 condition should be implemented as a series of 2 cmovs, not
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; by producing two conditions and using and on them.
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define dso_local i32 @select_or(i32 %a0, i32 %a1, float %a2, float %a3, i32 %a4, i32 %a5) {
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; CHECK-LABEL: select_or:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl %ecx, %eax
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; CHECK-NEXT: ucomiss %xmm0, %xmm1
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; CHECK-NEXT: cmoval %edx, %eax
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; CHECK-NEXT: cmpl %esi, %edi
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; CHECK-NEXT: cmovbl %edx, %eax
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; CHECK-NEXT: retq
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%cmp0 = icmp ult i32 %a0, %a1
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%cmp1 = fcmp olt float %a2, %a3
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%and = or i1 %cmp0, %cmp1
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%res = select i1 %and, i32 %a4, i32 %a5
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ret i32 %res
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}
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; If one of the conditions is materialized as a 0/1 value anyway, then the
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; sequence of 2 cmovs should not be used.
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@var32 = dso_local global i32 0
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define dso_local i32 @select_noopt(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4) {
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; CHECK-LABEL: select_noopt:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl %ecx, %eax
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; CHECK-NEXT: cmpl %esi, %edi
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; CHECK-NEXT: setb %cl
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; CHECK-NEXT: cmpl %edx, %esi
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; CHECK-NEXT: setb %dl
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; CHECK-NEXT: orb %cl, %dl
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; CHECK-NEXT: movzbl %dl, %ecx
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; CHECK-NEXT: movl %ecx, var32(%rip)
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; CHECK-NEXT: testb %cl, %cl
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; CHECK-NEXT: cmovel %r8d, %eax
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; CHECK-NEXT: retq
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%cmp0 = icmp ult i32 %a0, %a1
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%cmp1 = icmp ult i32 %a1, %a2
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%or = or i1 %cmp0, %cmp1
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%zero_one = zext i1 %or to i32
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store volatile i32 %zero_one, ptr @var32
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%res = select i1 %or, i32 %a3, i32 %a4
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ret i32 %res
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}
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