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memCmpUsedInZeroEqualityComparison.ll
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memCmpUsedInZeroEqualityComparison.ll
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -ppc-gpr-icmps=all -verify-machineinstrs -mcpu=pwr8 < %s | FileCheck %s
target datalayout = "e-m:e-i64:64-n32:64"
target triple = "powerpc64le-unknown-linux-gnu"
@zeroEqualityTest01.buffer1 = private unnamed_addr constant [3 x i32] [i32 1, i32 2, i32 4], align 4
@zeroEqualityTest01.buffer2 = private unnamed_addr constant [3 x i32] [i32 1, i32 2, i32 3], align 4
@zeroEqualityTest02.buffer1 = private unnamed_addr constant [4 x i32] [i32 4, i32 0, i32 0, i32 0], align 4
@zeroEqualityTest02.buffer2 = private unnamed_addr constant [4 x i32] [i32 3, i32 0, i32 0, i32 0], align 4
@zeroEqualityTest03.buffer1 = private unnamed_addr constant [4 x i32] [i32 0, i32 0, i32 0, i32 3], align 4
@zeroEqualityTest03.buffer2 = private unnamed_addr constant [4 x i32] [i32 0, i32 0, i32 0, i32 4], align 4
@zeroEqualityTest04.buffer1 = private unnamed_addr constant [15 x i32] [i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14], align 4
@zeroEqualityTest04.buffer2 = private unnamed_addr constant [15 x i32] [i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 13], align 4
declare signext i32 @memcmp(i8* nocapture, i8* nocapture, i64) local_unnamed_addr #1
; Check 4 bytes - requires 1 load for each param.
define signext i32 @zeroEqualityTest02(i8* %x, i8* %y) {
; CHECK-LABEL: zeroEqualityTest02:
; CHECK: # %bb.0:
; CHECK-NEXT: lwz 3, 0(3)
; CHECK-NEXT: lwz 4, 0(4)
; CHECK-NEXT: xor 3, 3, 4
; CHECK-NEXT: cntlzw 3, 3
; CHECK-NEXT: srwi 3, 3, 5
; CHECK-NEXT: xori 3, 3, 1
; CHECK-NEXT: blr
%call = tail call signext i32 @memcmp(i8* %x, i8* %y, i64 4)
%not.cmp = icmp ne i32 %call, 0
%. = zext i1 %not.cmp to i32
ret i32 %.
}
; Check 16 bytes - requires 2 loads for each param (or use vectors?).
define signext i32 @zeroEqualityTest01(i8* %x, i8* %y) {
; CHECK-LABEL: zeroEqualityTest01:
; CHECK: # %bb.0:
; CHECK-NEXT: ld 5, 0(3)
; CHECK-NEXT: ld 6, 0(4)
; CHECK-NEXT: cmpld 5, 6
; CHECK-NEXT: bne 0, .LBB1_2
; CHECK-NEXT: # %bb.1: # %loadbb1
; CHECK-NEXT: ld 3, 8(3)
; CHECK-NEXT: ld 4, 8(4)
; CHECK-NEXT: cmpld 3, 4
; CHECK-NEXT: li 3, 0
; CHECK-NEXT: beq 0, .LBB1_3
; CHECK-NEXT: .LBB1_2: # %res_block
; CHECK-NEXT: li 3, 1
; CHECK-NEXT: .LBB1_3: # %endblock
; CHECK-NEXT: clrldi 3, 3, 32
; CHECK-NEXT: blr
%call = tail call signext i32 @memcmp(i8* %x, i8* %y, i64 16)
%not.tobool = icmp ne i32 %call, 0
%. = zext i1 %not.tobool to i32
ret i32 %.
}
; Check 7 bytes - requires 3 loads for each param.
define signext i32 @zeroEqualityTest03(i8* %x, i8* %y) {
; CHECK-LABEL: zeroEqualityTest03:
; CHECK: # %bb.0:
; CHECK-NEXT: lwz 5, 0(3)
; CHECK-NEXT: lwz 6, 0(4)
; CHECK-NEXT: cmplw 5, 6
; CHECK-NEXT: bne 0, .LBB2_3
; CHECK-NEXT: # %bb.1: # %loadbb1
; CHECK-NEXT: lhz 5, 4(3)
; CHECK-NEXT: lhz 6, 4(4)
; CHECK-NEXT: cmplw 5, 6
; CHECK-NEXT: bne 0, .LBB2_3
; CHECK-NEXT: # %bb.2: # %loadbb2
; CHECK-NEXT: lbz 3, 6(3)
; CHECK-NEXT: lbz 4, 6(4)
; CHECK-NEXT: cmplw 3, 4
; CHECK-NEXT: li 3, 0
; CHECK-NEXT: beq 0, .LBB2_4
; CHECK-NEXT: .LBB2_3: # %res_block
; CHECK-NEXT: li 3, 1
; CHECK-NEXT: .LBB2_4: # %endblock
; CHECK-NEXT: clrldi 3, 3, 32
; CHECK-NEXT: blr
%call = tail call signext i32 @memcmp(i8* %x, i8* %y, i64 7)
%not.lnot = icmp ne i32 %call, 0
%cond = zext i1 %not.lnot to i32
ret i32 %cond
}
; Validate with > 0
define signext i32 @zeroEqualityTest04() {
; CHECK-LABEL: zeroEqualityTest04:
; CHECK: # %bb.0: # %loadbb
; CHECK-NEXT: li 3, 0
; CHECK-NEXT: blr
%call = tail call signext i32 @memcmp(i8* bitcast ([4 x i32]* @zeroEqualityTest02.buffer1 to i8*), i8* bitcast ([4 x i32]* @zeroEqualityTest02.buffer2 to i8*), i64 16)
%not.cmp = icmp slt i32 %call, 1
%. = zext i1 %not.cmp to i32
ret i32 %.
}
; Validate with < 0
define signext i32 @zeroEqualityTest05() {
; CHECK-LABEL: zeroEqualityTest05:
; CHECK: # %bb.0: # %loadbb
; CHECK-NEXT: li 3, 0
; CHECK-NEXT: blr
%call = tail call signext i32 @memcmp(i8* bitcast ([4 x i32]* @zeroEqualityTest03.buffer1 to i8*), i8* bitcast ([4 x i32]* @zeroEqualityTest03.buffer2 to i8*), i64 16)
%call.lobit = lshr i32 %call, 31
%call.lobit.not = xor i32 %call.lobit, 1
ret i32 %call.lobit.not
}
; Validate with memcmp()?:
define signext i32 @equalityFoldTwoConstants() {
; CHECK-LABEL: equalityFoldTwoConstants:
; CHECK: # %bb.0: # %loadbb
; CHECK-NEXT: li 3, 1
; CHECK-NEXT: blr
%call = tail call signext i32 @memcmp(i8* bitcast ([15 x i32]* @zeroEqualityTest04.buffer1 to i8*), i8* bitcast ([15 x i32]* @zeroEqualityTest04.buffer2 to i8*), i64 16)
%not.tobool = icmp eq i32 %call, 0
%cond = zext i1 %not.tobool to i32
ret i32 %cond
}
define signext i32 @equalityFoldOneConstant(i8* %X) {
; CHECK-LABEL: equalityFoldOneConstant:
; CHECK: # %bb.0:
; CHECK-NEXT: ld 4, 0(3)
; CHECK-NEXT: li 5, 1
; CHECK-NEXT: sldi 5, 5, 32
; CHECK-NEXT: cmpld 4, 5
; CHECK-NEXT: bne 0, .LBB6_2
; CHECK-NEXT: # %bb.1: # %loadbb1
; CHECK-NEXT: li 4, 3
; CHECK-NEXT: ld 3, 8(3)
; CHECK-NEXT: sldi 4, 4, 32
; CHECK-NEXT: ori 4, 4, 2
; CHECK-NEXT: cmpld 3, 4
; CHECK-NEXT: li 3, 0
; CHECK-NEXT: beq 0, .LBB6_3
; CHECK-NEXT: .LBB6_2: # %res_block
; CHECK-NEXT: li 3, 1
; CHECK-NEXT: .LBB6_3: # %endblock
; CHECK-NEXT: cntlzw 3, 3
; CHECK-NEXT: srwi 3, 3, 5
; CHECK-NEXT: blr
%call = tail call signext i32 @memcmp(i8* bitcast ([15 x i32]* @zeroEqualityTest04.buffer1 to i8*), i8* %X, i64 16)
%not.tobool = icmp eq i32 %call, 0
%cond = zext i1 %not.tobool to i32
ret i32 %cond
}
define i1 @length2_eq_nobuiltin_attr(i8* %X, i8* %Y) nounwind {
; CHECK-LABEL: length2_eq_nobuiltin_attr:
; CHECK: # %bb.0:
; CHECK-NEXT: mflr 0
; CHECK-NEXT: std 0, 16(1)
; CHECK-NEXT: stdu 1, -32(1)
; CHECK-NEXT: li 5, 2
; CHECK-NEXT: bl memcmp
; CHECK-NEXT: nop
; CHECK-NEXT: cntlzw 3, 3
; CHECK-NEXT: rlwinm 3, 3, 27, 31, 31
; CHECK-NEXT: addi 1, 1, 32
; CHECK-NEXT: ld 0, 16(1)
; CHECK-NEXT: mtlr 0
; CHECK-NEXT: blr
%m = tail call signext i32 @memcmp(i8* %X, i8* %Y, i64 2) nobuiltin
%c = icmp eq i32 %m, 0
ret i1 %c
}