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[x86] add tests for memcmp expansion; NFC 

We already had a test to demonstrate PR33325:
https://bugs.llvm.org/show_bug.cgi?id=33325

I'm adding tests for general memcmp expansion (see D34005 / D33963) and:
https://bugs.llvm.org/show_bug.cgi?id=33329

...plus non-power-of-2 sizes, so we can see what that looks like currently or if expanded.

llvm-svn: 304979
This commit is contained in:
Sanjay Patel 2017-06-08 15:01:29 +00:00
parent e891042105
commit 2ab6ee0dc4
1 changed files with 293 additions and 37 deletions
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330
llvm/test/CodeGen/X86/memcmp.ll
View File

@ -10,9 +10,28 @@
declare i32 @memcmp(i8*, i8*, i64)
define i1 @length2(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
define i32 @length2(i8* %X, i8* %Y) nounwind {
; X32-LABEL: length2:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $2
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: retl
;
; X64-LABEL: length2:
; X64: # BB#0:
; X64-NEXT: movl $2, %edx
; X64-NEXT: jmp memcmp # TAILCALL
%m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 2) nounwind
ret i32 %m
}
define i1 @length2_eq(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
; X32-LABEL: length2_eq:
; X32: # BB#0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X32-NEXT: movzwl (%ecx), %ecx
@ -20,7 +39,7 @@ define i1 @length2(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
; X32-NEXT: sete %al
; X32-NEXT: retl
;
; X64-LABEL: length2:
; X64-LABEL: length2_eq:
; X64: # BB#0:
; X64-NEXT: movzwl (%rdi), %eax
; X64-NEXT: cmpw (%rsi), %ax
@ -31,8 +50,8 @@ define i1 @length2(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
ret i1 %c
}
define i1 @length2_const(i8* %X, i32* nocapture %P) nounwind {
; X32-LABEL: length2_const:
define i1 @length2_eq_const(i8* %X, i32* nocapture %P) nounwind {
; X32-LABEL: length2_eq_const:
; X32: # BB#0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: movzwl (%eax), %eax
@ -40,7 +59,7 @@ define i1 @length2_const(i8* %X, i32* nocapture %P) nounwind {
; X32-NEXT: setne %al
; X32-NEXT: retl
;
; X64-LABEL: length2_const:
; X64-LABEL: length2_eq_const:
; X64: # BB#0:
; X64-NEXT: movzwl (%rdi), %eax
; X64-NEXT: cmpl $12849, %eax # imm = 0x3231
@ -51,8 +70,8 @@ define i1 @length2_const(i8* %X, i32* nocapture %P) nounwind {
ret i1 %c
}
define i1 @length2_nobuiltin_attr(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
; X32-LABEL: length2_nobuiltin_attr:
define i1 @length2_eq_nobuiltin_attr(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
; X32-LABEL: length2_eq_nobuiltin_attr:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $2
@ -64,7 +83,7 @@ define i1 @length2_nobuiltin_attr(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
; X32-NEXT: sete %al
; X32-NEXT: retl
;
; X64-LABEL: length2_nobuiltin_attr:
; X64-LABEL: length2_eq_nobuiltin_attr:
; X64: # BB#0:
; X64-NEXT: pushq %rax
; X64-NEXT: movl $2, %edx
@ -78,9 +97,74 @@ define i1 @length2_nobuiltin_attr(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
ret i1 %c
}
define i1 @length4(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
define i32 @length3(i8* %X, i8* %Y) nounwind {
; X32-LABEL: length3:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $3
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: retl
;
; X64-LABEL: length3:
; X64: # BB#0:
; X64-NEXT: movl $3, %edx
; X64-NEXT: jmp memcmp # TAILCALL
%m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 3) nounwind
ret i32 %m
}
define i1 @length3_eq(i8* %X, i8* %Y) nounwind {
; X32-LABEL: length3_eq:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $3
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: testl %eax, %eax
; X32-NEXT: setne %al
; X32-NEXT: retl
;
; X64-LABEL: length3_eq:
; X64: # BB#0:
; X64-NEXT: pushq %rax
; X64-NEXT: movl $3, %edx
; X64-NEXT: callq memcmp
; X64-NEXT: testl %eax, %eax
; X64-NEXT: setne %al
; X64-NEXT: popq %rcx
; X64-NEXT: retq
%m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 3) nounwind
%c = icmp ne i32 %m, 0
ret i1 %c
}
define i32 @length4(i8* %X, i8* %Y) nounwind {
; X32-LABEL: length4:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $4
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: retl
;
; X64-LABEL: length4:
; X64: # BB#0:
; X64-NEXT: movl $4, %edx
; X64-NEXT: jmp memcmp # TAILCALL
%m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 4) nounwind
ret i32 %m
}
define i1 @length4_eq(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
; X32-LABEL: length4_eq:
; X32: # BB#0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X32-NEXT: movl (%ecx), %ecx
@ -88,7 +172,7 @@ define i1 @length4(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
; X32-NEXT: setne %al
; X32-NEXT: retl
;
; X64-LABEL: length4:
; X64-LABEL: length4_eq:
; X64: # BB#0:
; X64-NEXT: movl (%rdi), %eax
; X64-NEXT: cmpl (%rsi), %eax
@ -99,15 +183,15 @@ define i1 @length4(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
ret i1 %c
}
define i1 @length4_const(i8* %X, i32* nocapture %P) nounwind {
; X32-LABEL: length4_const:
define i1 @length4_eq_const(i8* %X, i32* nocapture %P) nounwind {
; X32-LABEL: length4_eq_const:
; X32: # BB#0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: cmpl $875770417, (%eax) # imm = 0x34333231
; X32-NEXT: sete %al
; X32-NEXT: retl
;
; X64-LABEL: length4_const:
; X64-LABEL: length4_eq_const:
; X64: # BB#0:
; X64-NEXT: cmpl $875770417, (%rdi) # imm = 0x34333231
; X64-NEXT: sete %al
@ -117,7 +201,53 @@ define i1 @length4_const(i8* %X, i32* nocapture %P) nounwind {
ret i1 %c
}
define i1 @length8(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
define i32 @length5(i8* %X, i8* %Y) nounwind {
; X32-LABEL: length5:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $5
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: retl
;
; X64-LABEL: length5:
; X64: # BB#0:
; X64-NEXT: movl $5, %edx
; X64-NEXT: jmp memcmp # TAILCALL
%m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 5) nounwind
ret i32 %m
}
define i1 @length5_eq(i8* %X, i8* %Y) nounwind {
; X32-LABEL: length5_eq:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $5
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: testl %eax, %eax
; X32-NEXT: setne %al
; X32-NEXT: retl
;
; X64-LABEL: length5_eq:
; X64: # BB#0:
; X64-NEXT: pushq %rax
; X64-NEXT: movl $5, %edx
; X64-NEXT: callq memcmp
; X64-NEXT: testl %eax, %eax
; X64-NEXT: setne %al
; X64-NEXT: popq %rcx
; X64-NEXT: retq
%m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 5) nounwind
%c = icmp ne i32 %m, 0
ret i1 %c
}
define i32 @length8(i8* %X, i8* %Y) nounwind {
; X32-LABEL: length8:
; X32: # BB#0:
; X32-NEXT: pushl $0
@ -126,11 +256,30 @@ define i1 @length8(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: retl
;
; X64-LABEL: length8:
; X64: # BB#0:
; X64-NEXT: movl $8, %edx
; X64-NEXT: jmp memcmp # TAILCALL
%m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 8) nounwind
ret i32 %m
}
define i1 @length8_eq(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
; X32-LABEL: length8_eq:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $8
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: testl %eax, %eax
; X32-NEXT: sete %al
; X32-NEXT: retl
;
; X64-LABEL: length8:
; X64-LABEL: length8_eq:
; X64: # BB#0:
; X64-NEXT: movq (%rdi), %rax
; X64-NEXT: cmpq (%rsi), %rax
@ -141,8 +290,8 @@ define i1 @length8(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
ret i1 %c
}
define i1 @length8_const(i8* %X, i32* nocapture %P) nounwind {
; X32-LABEL: length8_const:
define i1 @length8_eq_const(i8* %X, i32* nocapture %P) nounwind {
; X32-LABEL: length8_eq_const:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $8
@ -154,7 +303,7 @@ define i1 @length8_const(i8* %X, i32* nocapture %P) nounwind {
; X32-NEXT: setne %al
; X32-NEXT: retl
;
; X64-LABEL: length8_const:
; X64-LABEL: length8_eq_const:
; X64: # BB#0:
; X64-NEXT: movabsq $3978425819141910832, %rax # imm = 0x3736353433323130
; X64-NEXT: cmpq %rax, (%rdi)
@ -165,7 +314,55 @@ define i1 @length8_const(i8* %X, i32* nocapture %P) nounwind {
ret i1 %c
}
define i1 @length16(i8* %x, i8* %y) nounwind {
define i1 @length12_eq(i8* %X, i8* %Y) nounwind {
; X32-LABEL: length12_eq:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $12
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: testl %eax, %eax
; X32-NEXT: setne %al
; X32-NEXT: retl
;
; X64-LABEL: length12_eq:
; X64: # BB#0:
; X64-NEXT: pushq %rax
; X64-NEXT: movl $12, %edx
; X64-NEXT: callq memcmp
; X64-NEXT: testl %eax, %eax
; X64-NEXT: setne %al
; X64-NEXT: popq %rcx
; X64-NEXT: retq
%m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 12) nounwind
%c = icmp ne i32 %m, 0
ret i1 %c
}
define i32 @length12(i8* %X, i8* %Y) nounwind {
; X32-LABEL: length12:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $12
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: retl
;
; X64-LABEL: length12:
; X64: # BB#0:
; X64-NEXT: movl $12, %edx
; X64-NEXT: jmp memcmp # TAILCALL
%m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 12) nounwind
ret i32 %m
}
; PR33329 - https://bugs.llvm.org/show_bug.cgi?id=33329
define i32 @length16(i8* %X, i8* %Y) nounwind {
; X32-LABEL: length16:
; X32: # BB#0:
; X32-NEXT: pushl $0
@ -174,11 +371,30 @@ define i1 @length16(i8* %x, i8* %y) nounwind {
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: retl
;
; X64-LABEL: length16:
; X64: # BB#0:
; X64-NEXT: movl $16, %edx
; X64-NEXT: jmp memcmp # TAILCALL
%m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 16) nounwind
ret i32 %m
}
define i1 @length16_eq(i8* %x, i8* %y) nounwind {
; X32-LABEL: length16_eq:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $16
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: testl %eax, %eax
; X32-NEXT: setne %al
; X32-NEXT: retl
;
; SSE2-LABEL: length16:
; SSE2-LABEL: length16_eq:
; SSE2: # BB#0:
; SSE2-NEXT: movdqu (%rsi), %xmm0
; SSE2-NEXT: movdqu (%rdi), %xmm1
@ -188,7 +404,7 @@ define i1 @length16(i8* %x, i8* %y) nounwind {
; SSE2-NEXT: setne %al
; SSE2-NEXT: retq
;
; AVX2-LABEL: length16:
; AVX2-LABEL: length16_eq:
; AVX2: # BB#0:
; AVX2-NEXT: vmovdqu (%rdi), %xmm0
; AVX2-NEXT: vpcmpeqb (%rsi), %xmm0, %xmm0
@ -201,8 +417,8 @@ define i1 @length16(i8* %x, i8* %y) nounwind {
ret i1 %cmp
}
define i1 @length16_const(i8* %X, i32* nocapture %P) nounwind {
; X32-LABEL: length16_const:
define i1 @length16_eq_const(i8* %X, i32* nocapture %P) nounwind {
; X32-LABEL: length16_eq_const:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $16
@ -214,7 +430,7 @@ define i1 @length16_const(i8* %X, i32* nocapture %P) nounwind {
; X32-NEXT: sete %al
; X32-NEXT: retl
;
; SSE2-LABEL: length16_const:
; SSE2-LABEL: length16_eq_const:
; SSE2: # BB#0:
; SSE2-NEXT: movdqu (%rdi), %xmm0
; SSE2-NEXT: pcmpeqb {{.*}}(%rip), %xmm0
@ -223,7 +439,7 @@ define i1 @length16_const(i8* %X, i32* nocapture %P) nounwind {
; SSE2-NEXT: sete %al
; SSE2-NEXT: retq
;
; AVX2-LABEL: length16_const:
; AVX2-LABEL: length16_eq_const:
; AVX2: # BB#0:
; AVX2-NEXT: vmovdqu (%rdi), %xmm0
; AVX2-NEXT: vpcmpeqb {{.*}}(%rip), %xmm0, %xmm0
@ -236,7 +452,7 @@ define i1 @length16_const(i8* %X, i32* nocapture %P) nounwind {
ret i1 %c
}
define i1 @length32(i8* %x, i8* %y) nounwind {
define i32 @length32(i8* %X, i8* %Y) nounwind {
; X32-LABEL: length32:
; X32: # BB#0:
; X32-NEXT: pushl $0
@ -245,11 +461,32 @@ define i1 @length32(i8* %x, i8* %y) nounwind {
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: retl
;
; X64-LABEL: length32:
; X64: # BB#0:
; X64-NEXT: movl $32, %edx
; X64-NEXT: jmp memcmp # TAILCALL
%m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 32) nounwind
ret i32 %m
}
; PR33325 - https://bugs.llvm.org/show_bug.cgi?id=33325
define i1 @length32_eq(i8* %x, i8* %y) nounwind {
; X32-LABEL: length32_eq:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $32
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: testl %eax, %eax
; X32-NEXT: sete %al
; X32-NEXT: retl
;
; SSE2-LABEL: length32:
; SSE2-LABEL: length32_eq:
; SSE2: # BB#0:
; SSE2-NEXT: pushq %rax
; SSE2-NEXT: movl $32, %edx
@ -259,7 +496,7 @@ define i1 @length32(i8* %x, i8* %y) nounwind {
; SSE2-NEXT: popq %rcx
; SSE2-NEXT: retq
;
; AVX2-LABEL: length32:
; AVX2-LABEL: length32_eq:
; AVX2: # BB#0:
; AVX2-NEXT: vmovdqu (%rdi), %ymm0
; AVX2-NEXT: vpcmpeqb (%rsi), %ymm0, %ymm0
@ -273,8 +510,8 @@ define i1 @length32(i8* %x, i8* %y) nounwind {
ret i1 %cmp
}
define i1 @length32_const(i8* %X, i32* nocapture %P) nounwind {
; X32-LABEL: length32_const:
define i1 @length32_eq_const(i8* %X, i32* nocapture %P) nounwind {
; X32-LABEL: length32_eq_const:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $32
@ -286,7 +523,7 @@ define i1 @length32_const(i8* %X, i32* nocapture %P) nounwind {
; X32-NEXT: setne %al
; X32-NEXT: retl
;
; SSE2-LABEL: length32_const:
; SSE2-LABEL: length32_eq_const:
; SSE2: # BB#0:
; SSE2-NEXT: pushq %rax
; SSE2-NEXT: movl $.L.str, %esi
@ -297,7 +534,7 @@ define i1 @length32_const(i8* %X, i32* nocapture %P) nounwind {
; SSE2-NEXT: popq %rcx
; SSE2-NEXT: retq
;
; AVX2-LABEL: length32_const:
; AVX2-LABEL: length32_eq_const:
; AVX2: # BB#0:
; AVX2-NEXT: vmovdqu (%rdi), %ymm0
; AVX2-NEXT: vpcmpeqb {{.*}}(%rip), %ymm0, %ymm0
@ -311,7 +548,7 @@ define i1 @length32_const(i8* %X, i32* nocapture %P) nounwind {
ret i1 %c
}
define i1 @length64(i8* %x, i8* %y) nounwind {
define i32 @length64(i8* %X, i8* %Y) nounwind {
; X32-LABEL: length64:
; X32: # BB#0:
; X32-NEXT: pushl $0
@ -320,11 +557,30 @@ define i1 @length64(i8* %x, i8* %y) nounwind {
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: retl
;
; X64-LABEL: length64:
; X64: # BB#0:
; X64-NEXT: movl $64, %edx
; X64-NEXT: jmp memcmp # TAILCALL
%m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 64) nounwind
ret i32 %m
}
define i1 @length64_eq(i8* %x, i8* %y) nounwind {
; X32-LABEL: length64_eq:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $64
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: pushl {{[0-9]+}}(%esp)
; X32-NEXT: calll memcmp
; X32-NEXT: addl $16, %esp
; X32-NEXT: testl %eax, %eax
; X32-NEXT: setne %al
; X32-NEXT: retl
;
; X64-LABEL: length64:
; X64-LABEL: length64_eq:
; X64: # BB#0:
; X64-NEXT: pushq %rax
; X64-NEXT: movl $64, %edx
@ -338,8 +594,8 @@ define i1 @length64(i8* %x, i8* %y) nounwind {
ret i1 %cmp
}
define i1 @length64_const(i8* %X, i32* nocapture %P) nounwind {
; X32-LABEL: length64_const:
define i1 @length64_eq_const(i8* %X, i32* nocapture %P) nounwind {
; X32-LABEL: length64_eq_const:
; X32: # BB#0:
; X32-NEXT: pushl $0
; X32-NEXT: pushl $64
@ -351,7 +607,7 @@ define i1 @length64_const(i8* %X, i32* nocapture %P) nounwind {
; X32-NEXT: sete %al
; X32-NEXT: retl
;
; X64-LABEL: length64_const:
; X64-LABEL: length64_eq_const:
; X64: # BB#0:
; X64-NEXT: pushq %rax
; X64-NEXT: movl $.L.str, %esi