From ee5c36fd5909202031aac7e49f6d39cc66a461a9 Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Tue, 25 Jul 2017 10:33:36 +0000
Subject: [PATCH] [X86] Add 24-byte memcmp tests (PR33914)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308963 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/X86/memcmp-minsize.ll |  87 ++++++++++++++++
 test/CodeGen/X86/memcmp-optsize.ll |  76 ++++++++++++++
 test/CodeGen/X86/memcmp.ll         | 158 +++++++++++++++++++++++++----
 3 files changed, 304 insertions(+), 17 deletions(-)

diff --git a/test/CodeGen/X86/memcmp-minsize.ll b/test/CodeGen/X86/memcmp-minsize.ll
index a7f42644ca2..a55c40f5bda 100644
--- a/test/CodeGen/X86/memcmp-minsize.ll
+++ b/test/CodeGen/X86/memcmp-minsize.ll
@@ -527,6 +527,93 @@ define i1 @length16_eq_const(i8* %X) nounwind minsize {
   ret i1 %c
 }
 
+; PR33914 - https://bugs.llvm.org/show_bug.cgi?id=33914
+
+define i32 @length24(i8* %X, i8* %Y) nounwind minsize {
+; X86-LABEL: length24:
+; X86:       # BB#0:
+; X86-NEXT:    subl $16, %esp
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    movl %ecx, {{[0-9]+}}(%esp)
+; X86-NEXT:    movl %eax, (%esp)
+; X86-NEXT:    andl $0, {{[0-9]+}}(%esp)
+; X86-NEXT:    movl $24, {{[0-9]+}}(%esp)
+; X86-NEXT:    calll memcmp
+; X86-NEXT:    addl $16, %esp
+; X86-NEXT:    retl
+;
+; X64-LABEL: length24:
+; X64:       # BB#0:
+; X64-NEXT:    pushq $24
+; X64-NEXT:    popq %rdx
+; X64-NEXT:    jmp memcmp # TAILCALL
+  %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 24) nounwind
+  ret i32 %m
+}
+
+define i1 @length24_eq(i8* %x, i8* %y) nounwind minsize {
+; X86-LABEL: length24_eq:
+; X86:       # BB#0:
+; X86-NEXT:    subl $16, %esp
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    movl %ecx, {{[0-9]+}}(%esp)
+; X86-NEXT:    movl %eax, (%esp)
+; X86-NEXT:    andl $0, {{[0-9]+}}(%esp)
+; X86-NEXT:    movl $24, {{[0-9]+}}(%esp)
+; X86-NEXT:    calll memcmp
+; X86-NEXT:    testl %eax, %eax
+; X86-NEXT:    sete %al
+; X86-NEXT:    addl $16, %esp
+; X86-NEXT:    retl
+;
+; X64-LABEL: length24_eq:
+; X64:       # BB#0:
+; X64-NEXT:    pushq %rax
+; X64-NEXT:    pushq $24
+; X64-NEXT:    popq %rdx
+; X64-NEXT:    callq memcmp
+; X64-NEXT:    testl %eax, %eax
+; X64-NEXT:    sete %al
+; X64-NEXT:    popq %rcx
+; X64-NEXT:    retq
+  %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 24) nounwind
+  %cmp = icmp eq i32 %call, 0
+  ret i1 %cmp
+}
+
+define i1 @length24_eq_const(i8* %X) nounwind minsize {
+; X86-LABEL: length24_eq_const:
+; X86:       # BB#0:
+; X86-NEXT:    subl $16, %esp
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl %eax, (%esp)
+; X86-NEXT:    andl $0, {{[0-9]+}}(%esp)
+; X86-NEXT:    movl $24, {{[0-9]+}}(%esp)
+; X86-NEXT:    movl $.L.str, {{[0-9]+}}(%esp)
+; X86-NEXT:    calll memcmp
+; X86-NEXT:    testl %eax, %eax
+; X86-NEXT:    setne %al
+; X86-NEXT:    addl $16, %esp
+; X86-NEXT:    retl
+;
+; X64-LABEL: length24_eq_const:
+; X64:       # BB#0:
+; X64-NEXT:    pushq %rax
+; X64-NEXT:    pushq $24
+; X64-NEXT:    popq %rdx
+; X64-NEXT:    movl $.L.str, %esi
+; 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* getelementptr inbounds ([65 x i8], [65 x i8]* @.str, i32 0, i32 0), i64 24) nounwind
+  %c = icmp ne i32 %m, 0
+  ret i1 %c
+}
+
 define i32 @length32(i8* %X, i8* %Y) nounwind minsize {
 ; X86-LABEL: length32:
 ; X86:       # BB#0:
diff --git a/test/CodeGen/X86/memcmp-optsize.ll b/test/CodeGen/X86/memcmp-optsize.ll
index 450205a966d..4a5f3089051 100644
--- a/test/CodeGen/X86/memcmp-optsize.ll
+++ b/test/CodeGen/X86/memcmp-optsize.ll
@@ -699,6 +699,82 @@ define i1 @length16_eq_const(i8* %X) nounwind optsize {
   ret i1 %c
 }
 
+; PR33914 - https://bugs.llvm.org/show_bug.cgi?id=33914
+
+define i32 @length24(i8* %X, i8* %Y) nounwind optsize {
+; X86-LABEL: length24:
+; X86:       # BB#0:
+; X86-NEXT:    pushl $0
+; X86-NEXT:    pushl $24
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    calll memcmp
+; X86-NEXT:    addl $16, %esp
+; X86-NEXT:    retl
+;
+; X64-LABEL: length24:
+; X64:       # BB#0:
+; X64-NEXT:    movl $24, %edx
+; X64-NEXT:    jmp memcmp # TAILCALL
+  %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 24) nounwind
+  ret i32 %m
+}
+
+define i1 @length24_eq(i8* %x, i8* %y) nounwind optsize {
+; X86-LABEL: length24_eq:
+; X86:       # BB#0:
+; X86-NEXT:    pushl $0
+; X86-NEXT:    pushl $24
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    calll memcmp
+; X86-NEXT:    addl $16, %esp
+; X86-NEXT:    testl %eax, %eax
+; X86-NEXT:    sete %al
+; X86-NEXT:    retl
+;
+; X64-LABEL: length24_eq:
+; X64:       # BB#0:
+; X64-NEXT:    pushq %rax
+; X64-NEXT:    movl $24, %edx
+; X64-NEXT:    callq memcmp
+; X64-NEXT:    testl %eax, %eax
+; X64-NEXT:    sete %al
+; X64-NEXT:    popq %rcx
+; X64-NEXT:    retq
+  %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 24) nounwind
+  %cmp = icmp eq i32 %call, 0
+  ret i1 %cmp
+}
+
+define i1 @length24_eq_const(i8* %X) nounwind optsize {
+; X86-LABEL: length24_eq_const:
+; X86:       # BB#0:
+; X86-NEXT:    pushl $0
+; X86-NEXT:    pushl $24
+; X86-NEXT:    pushl $.L.str
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    calll memcmp
+; X86-NEXT:    addl $16, %esp
+; X86-NEXT:    testl %eax, %eax
+; X86-NEXT:    setne %al
+; X86-NEXT:    retl
+;
+; X64-LABEL: length24_eq_const:
+; X64:       # BB#0:
+; X64-NEXT:    pushq %rax
+; X64-NEXT:    movl $.L.str, %esi
+; X64-NEXT:    movl $24, %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* getelementptr inbounds ([65 x i8], [65 x i8]* @.str, i32 0, i32 0), i64 24) nounwind
+  %c = icmp ne i32 %m, 0
+  ret i1 %c
+}
+
 define i32 @length32(i8* %X, i8* %Y) nounwind optsize {
 ; X86-LABEL: length32:
 ; X86:       # BB#0:
diff --git a/test/CodeGen/X86/memcmp.ll b/test/CodeGen/X86/memcmp.ll
index 2e678276546..d15df314507 100644
--- a/test/CodeGen/X86/memcmp.ll
+++ b/test/CodeGen/X86/memcmp.ll
@@ -752,6 +752,130 @@ define i1 @length16_eq_const(i8* %X) nounwind {
   ret i1 %c
 }
 
+; PR33914 - https://bugs.llvm.org/show_bug.cgi?id=33914
+
+define i32 @length24(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length24:
+; X86:       # BB#0:
+; X86-NEXT:    pushl $0
+; X86-NEXT:    pushl $24
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    calll memcmp
+; X86-NEXT:    addl $16, %esp
+; X86-NEXT:    retl
+;
+; X64-LABEL: length24:
+; X64:       # BB#0: # %loadbb
+; X64-NEXT:    movq (%rdi), %rcx
+; X64-NEXT:    movq (%rsi), %rdx
+; X64-NEXT:    bswapq %rcx
+; X64-NEXT:    bswapq %rdx
+; X64-NEXT:    cmpq %rdx, %rcx
+; X64-NEXT:    jne .LBB19_1
+; X64-NEXT:  # BB#2: # %loadbb1
+; X64-NEXT:    movq 8(%rdi), %rcx
+; X64-NEXT:    movq 8(%rsi), %rdx
+; X64-NEXT:    bswapq %rcx
+; X64-NEXT:    bswapq %rdx
+; X64-NEXT:    cmpq %rdx, %rcx
+; X64-NEXT:    jne .LBB19_1
+; X64-NEXT:  # BB#3: # %loadbb2
+; X64-NEXT:    movq 16(%rdi), %rcx
+; X64-NEXT:    movq 16(%rsi), %rdx
+; X64-NEXT:    bswapq %rcx
+; X64-NEXT:    bswapq %rdx
+; X64-NEXT:    xorl %eax, %eax
+; X64-NEXT:    cmpq %rdx, %rcx
+; X64-NEXT:    jne .LBB19_1
+; X64-NEXT:  # BB#4: # %endblock
+; X64-NEXT:    retq
+; X64-NEXT:  .LBB19_1: # %res_block
+; X64-NEXT:    cmpq %rdx, %rcx
+; X64-NEXT:    movl $-1, %ecx
+; X64-NEXT:    movl $1, %eax
+; X64-NEXT:    cmovbl %ecx, %eax
+; X64-NEXT:    retq
+  %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 24) nounwind
+  ret i32 %m
+}
+
+define i1 @length24_eq(i8* %x, i8* %y) nounwind {
+; X86-LABEL: length24_eq:
+; X86:       # BB#0:
+; X86-NEXT:    pushl $0
+; X86-NEXT:    pushl $24
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    calll memcmp
+; X86-NEXT:    addl $16, %esp
+; X86-NEXT:    testl %eax, %eax
+; X86-NEXT:    sete %al
+; X86-NEXT:    retl
+;
+; X64-LABEL: length24_eq:
+; X64:       # BB#0: # %loadbb
+; X64-NEXT:    movq (%rdi), %rax
+; X64-NEXT:    cmpq (%rsi), %rax
+; X64-NEXT:    jne .LBB20_1
+; X64-NEXT:  # BB#2: # %loadbb1
+; X64-NEXT:    movq 8(%rdi), %rax
+; X64-NEXT:    cmpq 8(%rsi), %rax
+; X64-NEXT:    jne .LBB20_1
+; X64-NEXT:  # BB#3: # %loadbb2
+; X64-NEXT:    movq 16(%rdi), %rcx
+; X64-NEXT:    xorl %eax, %eax
+; X64-NEXT:    cmpq 16(%rsi), %rcx
+; X64-NEXT:    je .LBB20_4
+; X64-NEXT:  .LBB20_1: # %res_block
+; X64-NEXT:    movl $1, %eax
+; X64-NEXT:  .LBB20_4: # %endblock
+; X64-NEXT:    testl %eax, %eax
+; X64-NEXT:    sete %al
+; X64-NEXT:    retq
+  %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 24) nounwind
+  %cmp = icmp eq i32 %call, 0
+  ret i1 %cmp
+}
+
+define i1 @length24_eq_const(i8* %X) nounwind {
+; X86-LABEL: length24_eq_const:
+; X86:       # BB#0:
+; X86-NEXT:    pushl $0
+; X86-NEXT:    pushl $24
+; X86-NEXT:    pushl $.L.str
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    calll memcmp
+; X86-NEXT:    addl $16, %esp
+; X86-NEXT:    testl %eax, %eax
+; X86-NEXT:    setne %al
+; X86-NEXT:    retl
+;
+; X64-LABEL: length24_eq_const:
+; X64:       # BB#0: # %loadbb
+; X64-NEXT:    movabsq $3978425819141910832, %rax # imm = 0x3736353433323130
+; X64-NEXT:    cmpq %rax, (%rdi)
+; X64-NEXT:    jne .LBB21_1
+; X64-NEXT:  # BB#2: # %loadbb1
+; X64-NEXT:    movabsq $3833745473465760056, %rax # imm = 0x3534333231303938
+; X64-NEXT:    cmpq %rax, 8(%rdi)
+; X64-NEXT:    jne .LBB21_1
+; X64-NEXT:  # BB#3: # %loadbb2
+; X64-NEXT:    xorl %eax, %eax
+; X64-NEXT:    movabsq $3689065127958034230, %rcx # imm = 0x3332313039383736
+; X64-NEXT:    cmpq %rcx, 16(%rdi)
+; X64-NEXT:    je .LBB21_4
+; X64-NEXT:  .LBB21_1: # %res_block
+; X64-NEXT:    movl $1, %eax
+; X64-NEXT:  .LBB21_4: # %endblock
+; X64-NEXT:    testl %eax, %eax
+; X64-NEXT:    setne %al
+; X64-NEXT:    retq
+  %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([65 x i8], [65 x i8]* @.str, i32 0, i32 0), i64 24) nounwind
+  %c = icmp ne i32 %m, 0
+  ret i1 %c
+}
+
 define i32 @length32(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length32:
 ; X86:       # BB#0:
@@ -770,21 +894,21 @@ define i32 @length32(i8* %X, i8* %Y) nounwind {
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
-; X64-NEXT:    jne .LBB19_1
+; X64-NEXT:    jne .LBB22_1
 ; X64-NEXT:  # BB#2: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rcx
 ; X64-NEXT:    movq 8(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
-; X64-NEXT:    jne .LBB19_1
+; X64-NEXT:    jne .LBB22_1
 ; X64-NEXT:  # BB#3: # %loadbb2
 ; X64-NEXT:    movq 16(%rdi), %rcx
 ; X64-NEXT:    movq 16(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
-; X64-NEXT:    jne .LBB19_1
+; X64-NEXT:    jne .LBB22_1
 ; X64-NEXT:  # BB#4: # %loadbb3
 ; X64-NEXT:    movq 24(%rdi), %rcx
 ; X64-NEXT:    movq 24(%rsi), %rdx
@@ -792,10 +916,10 @@ define i32 @length32(i8* %X, i8* %Y) nounwind {
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
-; X64-NEXT:    jne .LBB19_1
+; X64-NEXT:    jne .LBB22_1
 ; X64-NEXT:  # BB#5: # %endblock
 ; X64-NEXT:    retq
-; X64-NEXT:  .LBB19_1: # %res_block
+; X64-NEXT:  .LBB22_1: # %res_block
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    movl $-1, %ecx
 ; X64-NEXT:    movl $1, %eax
@@ -824,23 +948,23 @@ define i1 @length32_eq(i8* %x, i8* %y) nounwind {
 ; X64:       # BB#0: # %loadbb
 ; X64-NEXT:    movq (%rdi), %rax
 ; X64-NEXT:    cmpq (%rsi), %rax
-; X64-NEXT:    jne .LBB20_1
+; X64-NEXT:    jne .LBB23_1
 ; X64-NEXT:  # BB#2: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rax
 ; X64-NEXT:    cmpq 8(%rsi), %rax
-; X64-NEXT:    jne .LBB20_1
+; X64-NEXT:    jne .LBB23_1
 ; X64-NEXT:  # BB#3: # %loadbb2
 ; X64-NEXT:    movq 16(%rdi), %rax
 ; X64-NEXT:    cmpq 16(%rsi), %rax
-; X64-NEXT:    jne .LBB20_1
+; X64-NEXT:    jne .LBB23_1
 ; X64-NEXT:  # BB#4: # %loadbb3
 ; X64-NEXT:    movq 24(%rdi), %rcx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq 24(%rsi), %rcx
-; X64-NEXT:    je .LBB20_5
-; X64-NEXT:  .LBB20_1: # %res_block
+; X64-NEXT:    je .LBB23_5
+; X64-NEXT:  .LBB23_1: # %res_block
 ; X64-NEXT:    movl $1, %eax
-; X64-NEXT:  .LBB20_5: # %endblock
+; X64-NEXT:  .LBB23_5: # %endblock
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    retq
@@ -866,23 +990,23 @@ define i1 @length32_eq_const(i8* %X) nounwind {
 ; X64:       # BB#0: # %loadbb
 ; X64-NEXT:    movabsq $3978425819141910832, %rax # imm = 0x3736353433323130
 ; X64-NEXT:    cmpq %rax, (%rdi)
-; X64-NEXT:    jne .LBB21_1
+; X64-NEXT:    jne .LBB24_1
 ; X64-NEXT:  # BB#2: # %loadbb1
 ; X64-NEXT:    movabsq $3833745473465760056, %rax # imm = 0x3534333231303938
 ; X64-NEXT:    cmpq %rax, 8(%rdi)
-; X64-NEXT:    jne .LBB21_1
+; X64-NEXT:    jne .LBB24_1
 ; X64-NEXT:  # BB#3: # %loadbb2
 ; X64-NEXT:    movabsq $3689065127958034230, %rax # imm = 0x3332313039383736
 ; X64-NEXT:    cmpq %rax, 16(%rdi)
-; X64-NEXT:    jne .LBB21_1
+; X64-NEXT:    jne .LBB24_1
 ; X64-NEXT:  # BB#4: # %loadbb3
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    movabsq $3544395820347831604, %rcx # imm = 0x3130393837363534
 ; X64-NEXT:    cmpq %rcx, 24(%rdi)
-; X64-NEXT:    je .LBB21_5
-; X64-NEXT:  .LBB21_1: # %res_block
+; X64-NEXT:    je .LBB24_5
+; X64-NEXT:  .LBB24_1: # %res_block
 ; X64-NEXT:    movl $1, %eax
-; X64-NEXT:  .LBB21_5: # %endblock
+; X64-NEXT:  .LBB24_5: # %endblock
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setne %al
 ; X64-NEXT:    retq
-- 
2.40.0