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

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown-unknown | FileCheck %s --check-prefixes=X86
; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefixes=X64
%WideUInt32 = type { i32, i32 }
define void @PR25858_i32(%WideUInt32* sret, %WideUInt32*, %WideUInt32*) nounwind {
; X86-LABEL: PR25858_i32:
; X86: # %bb.0: # %top
; X86-NEXT: pushl %esi
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-NEXT: movl (%edx), %esi
; X86-NEXT: movl 4(%edx), %edx
; X86-NEXT: subl (%ecx), %esi
; X86-NEXT: sbbl 4(%ecx), %edx
; X86-NEXT: movl %edx, 4(%eax)
; X86-NEXT: movl %esi, (%eax)
; X86-NEXT: popl %esi
; X86-NEXT: retl $4
;
; X64-LABEL: PR25858_i32:
; X64: # %bb.0: # %top
; X64-NEXT: movq %rdi, %rax
; X64-NEXT: movl (%rsi), %ecx
; X64-NEXT: movl 4(%rsi), %esi
; X64-NEXT: subl (%rdx), %ecx
; X64-NEXT: sbbl 4(%rdx), %esi
; X64-NEXT: movl %esi, 4(%rdi)
; X64-NEXT: movl %ecx, (%rdi)
; X64-NEXT: retq
top:
%3 = bitcast %WideUInt32* %1 to i32*
%4 = load i32, i32* %3, align 4
%5 = bitcast %WideUInt32* %2 to i32*
%6 = load i32, i32* %5, align 4
%7 = sub i32 %4, %6
%8 = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %4, i32 %6)
%9 = extractvalue { i32, i1 } %8, 1
%10 = getelementptr inbounds %WideUInt32, %WideUInt32* %1, i32 0, i32 1
%11 = load i32, i32* %10, align 8
%12 = getelementptr inbounds %WideUInt32, %WideUInt32* %2, i32 0, i32 1
%13 = load i32, i32* %12, align 8
%14 = sub i32 %11, %13
%.neg1 = sext i1 %9 to i32
%15 = add i32 %14, %.neg1
%16 = insertvalue %WideUInt32 undef, i32 %7, 0
%17 = insertvalue %WideUInt32 %16, i32 %15, 1
store %WideUInt32 %17, %WideUInt32* %0, align 4
ret void
}
declare { i32, i1 } @llvm.usub.with.overflow.i32(i32, i32)
%WideUInt64 = type { i64, i64 }
define void @PR25858_i64(%WideUInt64* sret, %WideUInt64*, %WideUInt64*) nounwind {
; X86-LABEL: PR25858_i64:
; X86: # %bb.0: # %top
; X86-NEXT: pushl %ebp
; X86-NEXT: pushl %ebx
; X86-NEXT: pushl %edi
; X86-NEXT: pushl %esi
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-NEXT: movl (%edx), %esi
; X86-NEXT: movl 4(%edx), %edi
; X86-NEXT: subl (%ecx), %esi
; X86-NEXT: sbbl 4(%ecx), %edi
; X86-NEXT: setb %bl
; X86-NEXT: movl 12(%edx), %ebp
; X86-NEXT: movl 8(%edx), %edx
; X86-NEXT: subl 8(%ecx), %edx
; X86-NEXT: sbbl 12(%ecx), %ebp
; X86-NEXT: movzbl %bl, %ecx
; X86-NEXT: subl %ecx, %edx
; X86-NEXT: sbbl $0, %ebp
; X86-NEXT: movl %esi, (%eax)
; X86-NEXT: movl %edi, 4(%eax)
; X86-NEXT: movl %edx, 8(%eax)
; X86-NEXT: movl %ebp, 12(%eax)
; X86-NEXT: popl %esi
; X86-NEXT: popl %edi
; X86-NEXT: popl %ebx
; X86-NEXT: popl %ebp
; X86-NEXT: retl $4
;
; X64-LABEL: PR25858_i64:
; X64: # %bb.0: # %top
; X64-NEXT: movq %rdi, %rax
; X64-NEXT: movq (%rsi), %rcx
; X64-NEXT: movq 8(%rsi), %rsi
; X64-NEXT: subq (%rdx), %rcx
; X64-NEXT: sbbq 8(%rdx), %rsi
; X64-NEXT: movq %rsi, 8(%rdi)
; X64-NEXT: movq %rcx, (%rdi)
; X64-NEXT: retq
top:
%3 = bitcast %WideUInt64* %1 to i64*
%4 = load i64, i64* %3, align 8
%5 = bitcast %WideUInt64* %2 to i64*
%6 = load i64, i64* %5, align 8
%7 = sub i64 %4, %6
%8 = call { i64, i1 } @llvm.usub.with.overflow.i64(i64 %4, i64 %6)
%9 = extractvalue { i64, i1 } %8, 1
%10 = getelementptr inbounds %WideUInt64, %WideUInt64* %1, i64 0, i32 1
%11 = load i64, i64* %10, align 8
%12 = getelementptr inbounds %WideUInt64, %WideUInt64* %2, i64 0, i32 1
%13 = load i64, i64* %12, align 8
%14 = sub i64 %11, %13
%.neg1 = sext i1 %9 to i64
%15 = add i64 %14, %.neg1
%16 = insertvalue %WideUInt64 undef, i64 %7, 0
%17 = insertvalue %WideUInt64 %16, i64 %15, 1
store %WideUInt64 %17, %WideUInt64* %0, align 8
ret void
}
declare { i64, i1 } @llvm.usub.with.overflow.i64(i64, i64)
; PR24545 less_than_ideal()
define i8 @PR24545(i32, i32, i32* nocapture readonly) {
; X86-LABEL: PR24545:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-NEXT: cmpl (%ecx), %edx
; X86-NEXT: sbbl 4(%ecx), %eax
; X86-NEXT: setb %al
; X86-NEXT: retl
;
; X64-LABEL: PR24545:
; X64: # %bb.0:
; X64-NEXT: cmpl (%rdx), %edi
; X64-NEXT: sbbl 4(%rdx), %esi
; X64-NEXT: setb %al
; X64-NEXT: retq
%4 = load i32, i32* %2
%5 = icmp ugt i32 %4, %0
%6 = zext i1 %5 to i8
%7 = getelementptr inbounds i32, i32* %2, i32 1
%8 = load i32, i32* %7
%9 = tail call { i8, i32 } @llvm.x86.subborrow.32(i8 %6, i32 %1, i32 %8)
%10 = extractvalue { i8, i32 } %9, 0
%11 = icmp ne i8 %10, 0
%12 = zext i1 %11 to i8
ret i8 %12
}
define i32 @PR40483_sub1(i32*, i32) nounwind {
; X86-LABEL: PR40483_sub1:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: subl %eax, (%ecx)
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: retl
;
; X64-LABEL: PR40483_sub1:
; X64: # %bb.0:
; X64-NEXT: subl %esi, (%rdi)
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: retq
%3 = load i32, i32* %0, align 4
%4 = tail call { i8, i32 } @llvm.x86.subborrow.32(i8 0, i32 %3, i32 %1)
%5 = extractvalue { i8, i32 } %4, 1
store i32 %5, i32* %0, align 4
%6 = sub i32 %1, %3
%7 = add i32 %6, %5
ret i32 %7
}
define i32 @PR40483_sub2(i32*, i32) nounwind {
; X86-LABEL: PR40483_sub2:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: subl %eax, (%ecx)
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: retl
;
; X64-LABEL: PR40483_sub2:
; X64: # %bb.0:
; X64-NEXT: subl %esi, (%rdi)
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: retq
%3 = load i32, i32* %0, align 4
%4 = sub i32 %3, %1
%5 = tail call { i8, i32 } @llvm.x86.subborrow.32(i8 0, i32 %3, i32 %1)
%6 = extractvalue { i8, i32 } %5, 1
store i32 %6, i32* %0, align 4
%7 = sub i32 %4, %6
ret i32 %7
}
define i32 @PR40483_sub3(i32*, i32) nounwind {
; X86-LABEL: PR40483_sub3:
; X86: # %bb.0:
; X86-NEXT: pushl %esi
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl (%eax), %edx
; X86-NEXT: movl {{[0-9]+}}(%esp), %esi
; X86-NEXT: movl %edx, %ecx
; X86-NEXT: subl %esi, %ecx
; X86-NEXT: subl %esi, %edx
; X86-NEXT: movl %edx, (%eax)
; X86-NEXT: jae .LBB5_1
; X86-NEXT: # %bb.2:
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: popl %esi
; X86-NEXT: retl
; X86-NEXT: .LBB5_1:
; X86-NEXT: movl %ecx, %eax
; X86-NEXT: negl %eax
; X86-NEXT: orl %ecx, %eax
; X86-NEXT: popl %esi
; X86-NEXT: retl
;
; X64-LABEL: PR40483_sub3:
; X64: # %bb.0:
; X64-NEXT: movl (%rdi), %ecx
; X64-NEXT: movl %ecx, %eax
; X64-NEXT: subl %esi, %eax
; X64-NEXT: movl %eax, %edx
; X64-NEXT: negl %edx
; X64-NEXT: orl %eax, %edx
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: subl %esi, %ecx
; X64-NEXT: movl %ecx, (%rdi)
; X64-NEXT: cmovael %edx, %eax
; X64-NEXT: retq
%3 = load i32, i32* %0, align 8
%4 = tail call { i8, i32 } @llvm.x86.subborrow.32(i8 0, i32 %3, i32 %1)
%5 = extractvalue { i8, i32 } %4, 1
store i32 %5, i32* %0, align 8
%6 = extractvalue { i8, i32 } %4, 0
%7 = icmp eq i8 %6, 0
%8 = sub i32 %1, %3
%9 = or i32 %5, %8
%10 = select i1 %7, i32 %9, i32 0
ret i32 %10
}
define i32 @PR40483_sub4(i32*, i32) nounwind {
; X86-LABEL: PR40483_sub4:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-NEXT: movl (%edx), %ecx
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: subl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl %ecx, (%edx)
; X86-NEXT: jae .LBB6_2
; X86-NEXT: # %bb.1:
; X86-NEXT: movl %ecx, %eax
; X86-NEXT: .LBB6_2:
; X86-NEXT: retl
;
; X64-LABEL: PR40483_sub4:
; X64: # %bb.0:
; X64-NEXT: movl (%rdi), %eax
; X64-NEXT: xorl %ecx, %ecx
; X64-NEXT: subl %esi, %eax
; X64-NEXT: movl %eax, (%rdi)
; X64-NEXT: cmovael %ecx, %eax
; X64-NEXT: retq
%3 = load i32, i32* %0, align 8
%4 = tail call { i8, i32 } @llvm.x86.subborrow.32(i8 0, i32 %3, i32 %1)
%5 = extractvalue { i8, i32 } %4, 1
store i32 %5, i32* %0, align 8
%6 = extractvalue { i8, i32 } %4, 0
%7 = icmp eq i8 %6, 0
%8 = sub i32 %3, %1
%9 = or i32 %5, %8
%10 = select i1 %7, i32 0, i32 %9
ret i32 %10
}
; Verify that a bogus cmov is simplified.
define i32 @PR40483_sub5(i32*, i32) nounwind {
; X86-LABEL: PR40483_sub5:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: subl %eax, (%ecx)
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: retl
;
; X64-LABEL: PR40483_sub5:
; X64: # %bb.0:
; X64-NEXT: subl %esi, (%rdi)
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: retq
%3 = load i32, i32* %0, align 8
%4 = tail call { i8, i32 } @llvm.x86.subborrow.32(i8 0, i32 %3, i32 %1)
%5 = extractvalue { i8, i32 } %4, 1
store i32 %5, i32* %0, align 8
%6 = extractvalue { i8, i32 } %4, 0
%7 = icmp eq i8 %6, 0
%8 = sub i32 %1, %3
%9 = add i32 %8, %5
%10 = select i1 %7, i32 %9, i32 0
ret i32 %10
}
define i32 @PR40483_sub6(i32*, i32) nounwind {
; X86-LABEL: PR40483_sub6:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-NEXT: movl (%edx), %ecx
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: subl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl %ecx, (%edx)
; X86-NEXT: jae .LBB8_2
; X86-NEXT: # %bb.1:
; X86-NEXT: leal (%ecx,%ecx), %eax
; X86-NEXT: .LBB8_2:
; X86-NEXT: retl
;
; X64-LABEL: PR40483_sub6:
; X64: # %bb.0:
; X64-NEXT: movl (%rdi), %eax
; X64-NEXT: xorl %ecx, %ecx
; X64-NEXT: subl %esi, %eax
; X64-NEXT: movl %eax, (%rdi)
; X64-NEXT: leal (%rax,%rax), %eax
; X64-NEXT: cmovael %ecx, %eax
; X64-NEXT: retq
%3 = load i32, i32* %0, align 8
%4 = tail call { i8, i32 } @llvm.x86.subborrow.32(i8 0, i32 %3, i32 %1)
%5 = extractvalue { i8, i32 } %4, 1
store i32 %5, i32* %0, align 8
%6 = extractvalue { i8, i32 } %4, 0
%7 = icmp eq i8 %6, 0
%8 = sub i32 %3, %1
%9 = add i32 %8, %5
%10 = select i1 %7, i32 0, i32 %9
ret i32 %10
}
declare { i8, i32 } @llvm.x86.subborrow.32(i8, i32, i32)
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