88 lines
3.2 KiB
LLVM
88 lines
3.2 KiB
LLVM
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; RUN: opt -inline %s -S | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "thumbv7m-arm-none-eabi"
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; CHECK-LABEL: define void @matcpy
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define void @matcpy(i8* %dest, i8* %source, i32 %num) #0 {
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entry:
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%0 = ptrtoint i8* %dest to i32
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%1 = ptrtoint i8* %source to i32
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%2 = xor i32 %0, %1
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%3 = and i32 %2, 3
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%cmp = icmp eq i32 %3, 0
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br i1 %cmp, label %if.then, label %if.else20
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if.then: ; preds = %entry
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%sub = sub i32 0, %0
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%and2 = and i32 %sub, 3
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%add = or i32 %and2, 4
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%cmp3 = icmp ugt i32 %add, %num
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br i1 %cmp3, label %if.else, label %if.then4
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if.then4: ; preds = %if.then
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%sub5 = sub i32 %num, %and2
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%shr = and i32 %sub5, -4
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%sub7 = sub i32 %sub5, %shr
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%tobool = icmp eq i32 %and2, 0
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br i1 %tobool, label %if.end, label %if.then8
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if.then8: ; preds = %if.then4
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; CHECK: call fastcc void @memcpy
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call fastcc void @memcpy(i8* %dest, i8* %source, i32 %and2) #0
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%add.ptr = getelementptr inbounds i8, i8* %dest, i32 %and2
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%add.ptr9 = getelementptr inbounds i8, i8* %source, i32 %and2
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br label %if.end
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if.end: ; preds = %if.then4, %if.then8
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%p_dest.0 = phi i8* [ %add.ptr, %if.then8 ], [ %dest, %if.then4 ]
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%p_source.0 = phi i8* [ %add.ptr9, %if.then8 ], [ %source, %if.then4 ]
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%tobool14 = icmp eq i32 %sub7, 0
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br i1 %tobool14, label %if.end22, label %if.then15
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if.then15: ; preds = %if.end
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%add.ptr13 = getelementptr inbounds i8, i8* %p_source.0, i32 %shr
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%add.ptr11 = getelementptr inbounds i8, i8* %p_dest.0, i32 %shr
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; CHECK: call fastcc void @memcpy
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call fastcc void @memcpy(i8* %add.ptr11, i8* %add.ptr13, i32 %sub7) #0
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br label %if.end22
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if.else: ; preds = %if.then
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call fastcc void @memcpy(i8* %dest, i8* %source, i32 %num) #0
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br label %if.end22
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if.else20: ; preds = %entry
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call fastcc void @memcpy(i8* %dest, i8* %source, i32 %num) #0
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br label %if.end22
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if.end22: ; preds = %if.then15, %if.end, %if.else, %if.else20
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ret void
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}
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; CHECK-LABEL: define internal void @memcpy
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define internal void @memcpy(i8* nocapture %dest, i8* nocapture readonly %source, i32 %num) #0 {
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entry:
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br label %while.cond
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while.cond: ; preds = %while.body, %entry
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%num.addr.0 = phi i32 [ %num, %entry ], [ %dec, %while.body ]
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%p_dest.0 = phi i8* [ %dest, %entry ], [ %incdec.ptr1, %while.body ]
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%p_source.0 = phi i8* [ %source, %entry ], [ %incdec.ptr, %while.body ]
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%cmp = icmp eq i32 %num.addr.0, 0
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br i1 %cmp, label %while.end, label %while.body
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while.body: ; preds = %while.cond
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%incdec.ptr = getelementptr inbounds i8, i8* %p_source.0, i32 1
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%0 = load i8, i8* %p_source.0, align 1
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%incdec.ptr1 = getelementptr inbounds i8, i8* %p_dest.0, i32 1
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store i8 %0, i8* %p_dest.0, align 1
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%dec = add i32 %num.addr.0, -1
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br label %while.cond
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while.end: ; preds = %while.cond
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ret void
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}
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attributes #0 = { minsize optsize }
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