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llvm-project/llvm/test/CodeGen/X86/shift-combine.ll

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=i686-unknown < %s | FileCheck %s --check-prefix=X32
; RUN: llc -mtriple=x86_64-unknown < %s | FileCheck %s --check-prefix=X64
@array = weak global [4 x i32] zeroinitializer
define i32 @test_lshr_and(i32 %x) {
; X32-LABEL: test_lshr_and:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: andl $12, %eax
; X32-NEXT: movl array(%eax), %eax
; X32-NEXT: retl
;
; X64-LABEL: test_lshr_and:
; X64: # %bb.0:
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: shrl $2, %edi
; X64-NEXT: andl $3, %edi
; X64-NEXT: movl array(,%rdi,4), %eax
; X64-NEXT: retq
%tmp2 = lshr i32 %x, 2
%tmp3 = and i32 %tmp2, 3
%tmp4 = getelementptr [4 x i32], [4 x i32]* @array, i32 0, i32 %tmp3
%tmp5 = load i32, i32* %tmp4, align 4
ret i32 %tmp5
}
define i32* @test_exact1(i32 %a, i32 %b, i32* %x) {
; X32-LABEL: test_exact1:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: subl {{[0-9]+}}(%esp), %eax
; X32-NEXT: sarl %eax
; X32-NEXT: addl {{[0-9]+}}(%esp), %eax
; X32-NEXT: retl
;
; X64-LABEL: test_exact1:
; X64: # %bb.0:
; X64-NEXT: subl %edi, %esi
; X64-NEXT: sarl $3, %esi
; X64-NEXT: movslq %esi, %rax
; X64-NEXT: leaq (%rdx,%rax,4), %rax
; X64-NEXT: retq
%sub = sub i32 %b, %a
%shr = ashr exact i32 %sub, 3
%gep = getelementptr inbounds i32, i32* %x, i32 %shr
ret i32* %gep
}
define i32* @test_exact2(i32 %a, i32 %b, i32* %x) {
; X32-LABEL: test_exact2:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: subl {{[0-9]+}}(%esp), %eax
; X32-NEXT: sarl %eax
; X32-NEXT: addl {{[0-9]+}}(%esp), %eax
; X32-NEXT: retl
;
; X64-LABEL: test_exact2:
; X64: # %bb.0:
; X64-NEXT: subl %edi, %esi
; X64-NEXT: sarl $3, %esi
; X64-NEXT: movslq %esi, %rax
; X64-NEXT: leaq (%rdx,%rax,4), %rax
; X64-NEXT: retq
%sub = sub i32 %b, %a
%shr = ashr exact i32 %sub, 3
%gep = getelementptr inbounds i32, i32* %x, i32 %shr
ret i32* %gep
}
define i32* @test_exact3(i32 %a, i32 %b, i32* %x) {
; X32-LABEL: test_exact3:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: subl {{[0-9]+}}(%esp), %eax
; X32-NEXT: addl {{[0-9]+}}(%esp), %eax
; X32-NEXT: retl
;
; X64-LABEL: test_exact3:
; X64: # %bb.0:
; X64-NEXT: subl %edi, %esi
; X64-NEXT: sarl $2, %esi
; X64-NEXT: movslq %esi, %rax
; X64-NEXT: leaq (%rdx,%rax,4), %rax
; X64-NEXT: retq
%sub = sub i32 %b, %a
%shr = ashr exact i32 %sub, 2
%gep = getelementptr inbounds i32, i32* %x, i32 %shr
ret i32* %gep
}
define i32* @test_exact4(i32 %a, i32 %b, i32* %x) {
; X32-LABEL: test_exact4:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: subl {{[0-9]+}}(%esp), %eax
; X32-NEXT: shrl %eax
; X32-NEXT: addl {{[0-9]+}}(%esp), %eax
; X32-NEXT: retl
;
; X64-LABEL: test_exact4:
; X64: # %bb.0:
; X64-NEXT: # kill: def $esi killed $esi def $rsi
; X64-NEXT: subl %edi, %esi
; X64-NEXT: shrl $3, %esi
; X64-NEXT: leaq (%rdx,%rsi,4), %rax
; X64-NEXT: retq
%sub = sub i32 %b, %a
%shr = lshr exact i32 %sub, 3
%gep = getelementptr inbounds i32, i32* %x, i32 %shr
ret i32* %gep
}
define i32* @test_exact5(i32 %a, i32 %b, i32* %x) {
; X32-LABEL: test_exact5:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: subl {{[0-9]+}}(%esp), %eax
; X32-NEXT: shrl %eax
; X32-NEXT: addl {{[0-9]+}}(%esp), %eax
; X32-NEXT: retl
;
; X64-LABEL: test_exact5:
; X64: # %bb.0:
; X64-NEXT: # kill: def $esi killed $esi def $rsi
; X64-NEXT: subl %edi, %esi
; X64-NEXT: shrl $3, %esi
; X64-NEXT: leaq (%rdx,%rsi,4), %rax
; X64-NEXT: retq
%sub = sub i32 %b, %a
%shr = lshr exact i32 %sub, 3
%gep = getelementptr inbounds i32, i32* %x, i32 %shr
ret i32* %gep
}
define i32* @test_exact6(i32 %a, i32 %b, i32* %x) {
; X32-LABEL: test_exact6:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: subl {{[0-9]+}}(%esp), %eax
; X32-NEXT: addl {{[0-9]+}}(%esp), %eax
; X32-NEXT: retl
;
; X64-LABEL: test_exact6:
; X64: # %bb.0:
; X64-NEXT: # kill: def $esi killed $esi def $rsi
; X64-NEXT: subl %edi, %esi
; X64-NEXT: leaq (%rsi,%rdx), %rax
; X64-NEXT: retq
%sub = sub i32 %b, %a
%shr = lshr exact i32 %sub, 2
%gep = getelementptr inbounds i32, i32* %x, i32 %shr
ret i32* %gep
}
; PR42644 - https://bugs.llvm.org/show_bug.cgi?id=42644
define i64 @ashr_add_shl_i32(i64 %r) nounwind {
; X32-LABEL: ashr_add_shl_i32:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: incl %eax
; X32-NEXT: movl %eax, %edx
; X32-NEXT: sarl $31, %edx
; X32-NEXT: retl
;
; X64-LABEL: ashr_add_shl_i32:
; X64: # %bb.0:
; X64-NEXT: incl %edi
; X64-NEXT: movslq %edi, %rax
; X64-NEXT: retq
%conv = shl i64 %r, 32
%sext = add i64 %conv, 4294967296
%conv1 = ashr i64 %sext, 32
ret i64 %conv1
}
define i64 @ashr_add_shl_i8(i64 %r) nounwind {
; X32-LABEL: ashr_add_shl_i8:
; X32: # %bb.0:
; X32-NEXT: movb {{[0-9]+}}(%esp), %al
; X32-NEXT: addb $2, %al
; X32-NEXT: movsbl %al, %eax
; X32-NEXT: movl %eax, %edx
; X32-NEXT: sarl $31, %edx
; X32-NEXT: retl
;
; X64-LABEL: ashr_add_shl_i8:
; X64: # %bb.0:
; X64-NEXT: addb $2, %dil
; X64-NEXT: movsbq %dil, %rax
; X64-NEXT: retq
%conv = shl i64 %r, 56
%sext = add i64 %conv, 144115188075855872
%conv1 = ashr i64 %sext, 56
ret i64 %conv1
}
define <4 x i32> @ashr_add_shl_v4i8(<4 x i32> %r) nounwind {
; X32-LABEL: ashr_add_shl_v4i8:
; X32: # %bb.0:
; X32-NEXT: pushl %edi
; X32-NEXT: pushl %esi
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: movb {{[0-9]+}}(%esp), %cl
; X32-NEXT: movb {{[0-9]+}}(%esp), %dl
; X32-NEXT: movb {{[0-9]+}}(%esp), %ch
; X32-NEXT: movb {{[0-9]+}}(%esp), %dh
; X32-NEXT: incb %dh
; X32-NEXT: movsbl %dh, %esi
; X32-NEXT: incb %ch
; X32-NEXT: movsbl %ch, %edi
; X32-NEXT: incb %dl
; X32-NEXT: movsbl %dl, %edx
; X32-NEXT: incb %cl
; X32-NEXT: movsbl %cl, %ecx
; X32-NEXT: movl %ecx, 12(%eax)
; X32-NEXT: movl %edx, 8(%eax)
; X32-NEXT: movl %edi, 4(%eax)
; X32-NEXT: movl %esi, (%eax)
; X32-NEXT: popl %esi
; X32-NEXT: popl %edi
; X32-NEXT: retl $4
;
; X64-LABEL: ashr_add_shl_v4i8:
; X64: # %bb.0:
; X64-NEXT: pand {{.*}}(%rip), %xmm0
; X64-NEXT: packuswb %xmm0, %xmm0
; X64-NEXT: packuswb %xmm0, %xmm0
; X64-NEXT: pcmpeqd %xmm1, %xmm1
; X64-NEXT: psubb %xmm1, %xmm0
; X64-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
; X64-NEXT: punpcklwd {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3]
; X64-NEXT: psrad $24, %xmm0
; X64-NEXT: retq
%conv = shl <4 x i32> %r, <i32 24, i32 24, i32 24, i32 24>
%sext = add <4 x i32> %conv, <i32 16777216, i32 16777216, i32 16777216, i32 16777216>
%conv1 = ashr <4 x i32> %sext, <i32 24, i32 24, i32 24, i32 24>
ret <4 x i32> %conv1
}
define i64 @ashr_add_shl_i36(i64 %r) nounwind {
; X32-LABEL: ashr_add_shl_i36:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %edx
; X32-NEXT: shll $4, %edx
; X32-NEXT: movl %edx, %eax
; X32-NEXT: sarl $4, %eax
; X32-NEXT: sarl $31, %edx
; X32-NEXT: retl
;
; X64-LABEL: ashr_add_shl_i36:
; X64: # %bb.0:
; X64-NEXT: movq %rdi, %rax
; X64-NEXT: shlq $36, %rax
; X64-NEXT: sarq $36, %rax
; X64-NEXT: retq
%conv = shl i64 %r, 36
%sext = add i64 %conv, 4294967296
%conv1 = ashr i64 %sext, 36
ret i64 %conv1
}
define i64 @ashr_add_shl_mismatch_shifts1(i64 %r) nounwind {
; X32-LABEL: ashr_add_shl_mismatch_shifts1:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: incl %eax
; X32-NEXT: movl %eax, %edx
; X32-NEXT: sarl $31, %edx
; X32-NEXT: retl
;
; X64-LABEL: ashr_add_shl_mismatch_shifts1:
; X64: # %bb.0:
; X64-NEXT: shlq $8, %rdi
; X64-NEXT: movabsq $4294967296, %rax # imm = 0x100000000
; X64-NEXT: addq %rdi, %rax
; X64-NEXT: sarq $32, %rax
; X64-NEXT: retq
%conv = shl i64 %r, 8
%sext = add i64 %conv, 4294967296
%conv1 = ashr i64 %sext, 32
ret i64 %conv1
}
define i64 @ashr_add_shl_mismatch_shifts2(i64 %r) nounwind {
; X32-LABEL: ashr_add_shl_mismatch_shifts2:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: movl {{[0-9]+}}(%esp), %edx
; X32-NEXT: shrdl $8, %edx, %eax
; X32-NEXT: shrl $8, %edx
; X32-NEXT: incl %edx
; X32-NEXT: shrdl $8, %edx, %eax
; X32-NEXT: shrl $8, %edx
; X32-NEXT: retl
;
; X64-LABEL: ashr_add_shl_mismatch_shifts2:
; X64: # %bb.0:
; X64-NEXT: shrq $8, %rdi
; X64-NEXT: movabsq $4294967296, %rax # imm = 0x100000000
; X64-NEXT: addq %rdi, %rax
; X64-NEXT: shrq $8, %rax
; X64-NEXT: retq
%conv = lshr i64 %r, 8
%sext = add i64 %conv, 4294967296
%conv1 = ashr i64 %sext, 8
ret i64 %conv1
}
define i32 @ashr_add_shl_i32_i8_extra_use1(i32 %r, i32* %p) nounwind {
; X32-LABEL: ashr_add_shl_i32_i8_extra_use1:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: shll $24, %eax
; X32-NEXT: addl $33554432, %eax # imm = 0x2000000
; X32-NEXT: movl %eax, (%ecx)
; X32-NEXT: sarl $24, %eax
; X32-NEXT: retl
;
; X64-LABEL: ashr_add_shl_i32_i8_extra_use1:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %eax
; X64-NEXT: shll $24, %eax
; X64-NEXT: addl $33554432, %eax # imm = 0x2000000
; X64-NEXT: movl %eax, (%rsi)
; X64-NEXT: sarl $24, %eax
; X64-NEXT: retq
%conv = shl i32 %r, 24
%sext = add i32 %conv, 33554432
store i32 %sext, i32* %p
%conv1 = ashr i32 %sext, 24
ret i32 %conv1
}
define i32 @ashr_add_shl_i32_i8_extra_use2(i32 %r, i32* %p) nounwind {
; X32-LABEL: ashr_add_shl_i32_i8_extra_use2:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: shll $24, %eax
; X32-NEXT: movl %eax, (%ecx)
; X32-NEXT: addl $33554432, %eax # imm = 0x2000000
; X32-NEXT: sarl $24, %eax
; X32-NEXT: retl
;
; X64-LABEL: ashr_add_shl_i32_i8_extra_use2:
; X64: # %bb.0:
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: shll $24, %edi
; X64-NEXT: movl %edi, (%rsi)
; X64-NEXT: leal 33554432(%rdi), %eax
; X64-NEXT: sarl $24, %eax
; X64-NEXT: retq
%conv = shl i32 %r, 24
store i32 %conv, i32* %p
%sext = add i32 %conv, 33554432
%conv1 = ashr i32 %sext, 24
ret i32 %conv1
}
define i32 @ashr_add_shl_i32_i8_extra_use3(i32 %r, i32* %p1, i32* %p2) nounwind {
; X32-LABEL: ashr_add_shl_i32_i8_extra_use3:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X32-NEXT: movl {{[0-9]+}}(%esp), %edx
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: shll $24, %eax
; X32-NEXT: movl %eax, (%edx)
; X32-NEXT: addl $33554432, %eax # imm = 0x2000000
; X32-NEXT: movl %eax, (%ecx)
; X32-NEXT: sarl $24, %eax
; X32-NEXT: retl
;
; X64-LABEL: ashr_add_shl_i32_i8_extra_use3:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %eax
; X64-NEXT: shll $24, %eax
; X64-NEXT: movl %eax, (%rsi)
; X64-NEXT: addl $33554432, %eax # imm = 0x2000000
; X64-NEXT: movl %eax, (%rdx)
; X64-NEXT: sarl $24, %eax
; X64-NEXT: retq
%conv = shl i32 %r, 24
store i32 %conv, i32* %p1
%sext = add i32 %conv, 33554432
store i32 %sext, i32* %p2
%conv1 = ashr i32 %sext, 24
ret i32 %conv1
}
%"class.QPainterPath" = type { double, double, i32 }
define void @PR42880(i32 %t0) {
; X32-LABEL: PR42880:
; X32: # %bb.0:
; X32-NEXT: xorl %eax, %eax
; X32-NEXT: testb %al, %al
; X32-NEXT: je .LBB16_1
; X32-NEXT: # %bb.2: # %if
; X32-NEXT: .LBB16_1: # %then
;
; X64-LABEL: PR42880:
; X64: # %bb.0:
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: testb %al, %al
; X64-NEXT: je .LBB16_1
; X64-NEXT: # %bb.2: # %if
; X64-NEXT: .LBB16_1: # %then
%sub = add nsw i32 %t0, -1
%add.ptr.i94 = getelementptr inbounds %"class.QPainterPath", %"class.QPainterPath"* null, i32 %sub
%x = ptrtoint %"class.QPainterPath"* %add.ptr.i94 to i32
%sub2 = sub i32 %x, 0
%div = sdiv exact i32 %sub2, 24
br i1 undef, label %if, label %then
then:
%t1 = xor i32 %div, -1
unreachable
if:
unreachable
}
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