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04b091a782
compare. On other targets we end up with a call to memcmp because we don't want 16 individual byte loads. We should be able to use movups as well, but we're failing to select the generated icmp. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92107 91177308-0d34-0410-b5e6-96231b3b80d8
111 lines
3.5 KiB
LLVM
111 lines
3.5 KiB
LLVM
; RUN: llc %s -o - -march=x86-64 | FileCheck %s
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; This tests codegen time inlining/optimization of memcmp
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; rdar://6480398
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@.str = private constant [23 x i8] c"fooooooooooooooooooooo\00", align 1 ; <[23 x i8]*> [#uses=1]
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declare i32 @memcmp(...)
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define void @memcmp2(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
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entry:
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%0 = tail call i32 (...)* @memcmp(i8* %X, i8* %Y, i32 2) nounwind ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %entry
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store i32 4, i32* %P, align 4
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ret void
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return: ; preds = %entry
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ret void
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; CHECK: memcmp2:
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; CHECK: movw (%rsi), %ax
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; CHECK: cmpw %ax, (%rdi)
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}
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define void @memcmp2a(i8* %X, i32* nocapture %P) nounwind {
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entry:
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%0 = tail call i32 (...)* @memcmp(i8* %X, i8* getelementptr inbounds ([23 x i8]* @.str, i32 0, i32 1), i32 2) nounwind ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %entry
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store i32 4, i32* %P, align 4
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ret void
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return: ; preds = %entry
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ret void
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; CHECK: memcmp2a:
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; CHECK: cmpw $28527, (%rdi)
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}
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define void @memcmp4(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
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entry:
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%0 = tail call i32 (...)* @memcmp(i8* %X, i8* %Y, i32 4) nounwind ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %entry
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store i32 4, i32* %P, align 4
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ret void
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return: ; preds = %entry
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ret void
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; CHECK: memcmp4:
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; CHECK: movl (%rsi), %eax
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; CHECK: cmpl %eax, (%rdi)
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}
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define void @memcmp4a(i8* %X, i32* nocapture %P) nounwind {
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entry:
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%0 = tail call i32 (...)* @memcmp(i8* %X, i8* getelementptr inbounds ([23 x i8]* @.str, i32 0, i32 1), i32 4) nounwind ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %entry
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store i32 4, i32* %P, align 4
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ret void
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return: ; preds = %entry
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ret void
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; CHECK: memcmp4a:
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; CHECK: cmpl $1869573999, (%rdi)
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}
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define void @memcmp8(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
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entry:
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%0 = tail call i32 (...)* @memcmp(i8* %X, i8* %Y, i32 8) nounwind ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %entry
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store i32 4, i32* %P, align 4
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ret void
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return: ; preds = %entry
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ret void
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; CHECK: memcmp8:
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; CHECK: movq (%rsi), %rax
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; CHECK: cmpq %rax, (%rdi)
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}
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define void @memcmp8a(i8* %X, i32* nocapture %P) nounwind {
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entry:
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%0 = tail call i32 (...)* @memcmp(i8* %X, i8* getelementptr inbounds ([23 x i8]* @.str, i32 0, i32 0), i32 8) nounwind ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %entry
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store i32 4, i32* %P, align 4
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ret void
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return: ; preds = %entry
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ret void
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; CHECK: memcmp8a:
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; CHECK: movabsq $8029759185026510694, %rax
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; CHECK: cmpq %rax, (%rdi)
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}
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