Mercurial > hg > Members > tobaru > cbc > CbC_llvm
view test/CodeGen/X86/atom-fixup-lea3.ll @ 33:e4204d083e25
LLVM 3.5
author | Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> |
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date | Thu, 12 Dec 2013 14:32:10 +0900 |
parents | 95c75e76d11b |
children | afa8332a0e37 |
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; RUN: llc < %s -mcpu=atom -mtriple=i686-linux | FileCheck %s ; CHECK: addl ([[reg:%[a-z]+]]) ; CHECK-NEXT: addl $4, [[reg]] ; Test for the FixupLEAs pre-emit pass. ; An LEA should NOT be substituted for the ADD instruction ; that increments the array pointer if it is greater than 5 instructions ; away from the memory reference that uses it. ; Original C code: clang -m32 -S -O2 ;int test(int n, int * array, int * m, int * array2) ;{ ; int i, j = 0; ; int sum = 0; ; for (i = 0, j = 0; i < n;) { ; ++i; ; *m += array2[j++]; ; sum += array[i]; ; } ; return sum; ;} define i32 @test(i32 %n, i32* nocapture %array, i32* nocapture %m, i32* nocapture %array2) #0 { entry: %cmp7 = icmp sgt i32 %n, 0 br i1 %cmp7, label %for.body.lr.ph, label %for.end for.body.lr.ph: ; preds = %entry %.pre = load i32* %m, align 4 br label %for.body for.body: ; preds = %for.body, %for.body.lr.ph %0 = phi i32 [ %.pre, %for.body.lr.ph ], [ %add, %for.body ] %sum.010 = phi i32 [ 0, %for.body.lr.ph ], [ %add3, %for.body ] %j.09 = phi i32 [ 0, %for.body.lr.ph ], [ %inc1, %for.body ] %inc1 = add nsw i32 %j.09, 1 %arrayidx = getelementptr inbounds i32* %array2, i32 %j.09 %1 = load i32* %arrayidx, align 4 %add = add nsw i32 %0, %1 store i32 %add, i32* %m, align 4 %arrayidx2 = getelementptr inbounds i32* %array, i32 %inc1 %2 = load i32* %arrayidx2, align 4 %add3 = add nsw i32 %2, %sum.010 %exitcond = icmp eq i32 %inc1, %n br i1 %exitcond, label %for.end, label %for.body for.end: ; preds = %for.body, %entry %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add3, %for.body ] ret i32 %sum.0.lcssa }