llvm-6502/test/CodeGen/X86/memcmp.ll
Chris Lattner 00e94baf4e convert cmp to use a multipattern
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115978 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-07 20:56:25 +00:00

111 lines
3.5 KiB
LLVM

; RUN: llc %s -o - -march=x86-64 | FileCheck %s
; This tests codegen time inlining/optimization of memcmp
; rdar://6480398
@.str = private constant [23 x i8] c"fooooooooooooooooooooo\00", align 1 ; <[23 x i8]*> [#uses=1]
declare i32 @memcmp(...)
define void @memcmp2(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
entry:
%0 = tail call i32 (...)* @memcmp(i8* %X, i8* %Y, i32 2) nounwind ; <i32> [#uses=1]
%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
br i1 %1, label %return, label %bb
bb: ; preds = %entry
store i32 4, i32* %P, align 4
ret void
return: ; preds = %entry
ret void
; CHECK: memcmp2:
; CHECK: movw (%rdi), %ax
; CHECK: cmpw (%rsi), %ax
}
define void @memcmp2a(i8* %X, i32* nocapture %P) nounwind {
entry:
%0 = tail call i32 (...)* @memcmp(i8* %X, i8* getelementptr inbounds ([23 x i8]* @.str, i32 0, i32 1), i32 2) nounwind ; <i32> [#uses=1]
%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
br i1 %1, label %return, label %bb
bb: ; preds = %entry
store i32 4, i32* %P, align 4
ret void
return: ; preds = %entry
ret void
; CHECK: memcmp2a:
; CHECK: cmpw $28527, (%rdi)
}
define void @memcmp4(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
entry:
%0 = tail call i32 (...)* @memcmp(i8* %X, i8* %Y, i32 4) nounwind ; <i32> [#uses=1]
%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
br i1 %1, label %return, label %bb
bb: ; preds = %entry
store i32 4, i32* %P, align 4
ret void
return: ; preds = %entry
ret void
; CHECK: memcmp4:
; CHECK: movl (%rdi), %eax
; CHECK: cmpl (%rsi), %eax
}
define void @memcmp4a(i8* %X, i32* nocapture %P) nounwind {
entry:
%0 = tail call i32 (...)* @memcmp(i8* %X, i8* getelementptr inbounds ([23 x i8]* @.str, i32 0, i32 1), i32 4) nounwind ; <i32> [#uses=1]
%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
br i1 %1, label %return, label %bb
bb: ; preds = %entry
store i32 4, i32* %P, align 4
ret void
return: ; preds = %entry
ret void
; CHECK: memcmp4a:
; CHECK: cmpl $1869573999, (%rdi)
}
define void @memcmp8(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
entry:
%0 = tail call i32 (...)* @memcmp(i8* %X, i8* %Y, i32 8) nounwind ; <i32> [#uses=1]
%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
br i1 %1, label %return, label %bb
bb: ; preds = %entry
store i32 4, i32* %P, align 4
ret void
return: ; preds = %entry
ret void
; CHECK: memcmp8:
; CHECK: movq (%rdi), %rax
; CHECK: cmpq (%rsi), %rax
}
define void @memcmp8a(i8* %X, i32* nocapture %P) nounwind {
entry:
%0 = tail call i32 (...)* @memcmp(i8* %X, i8* getelementptr inbounds ([23 x i8]* @.str, i32 0, i32 0), i32 8) nounwind ; <i32> [#uses=1]
%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
br i1 %1, label %return, label %bb
bb: ; preds = %entry
store i32 4, i32* %P, align 4
ret void
return: ; preds = %entry
ret void
; CHECK: memcmp8a:
; CHECK: movabsq $8029759185026510694, %rax
; CHECK: cmpq %rax, (%rdi)
}