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view test/CodeGen/X86/atom-fixup-lea1.ll @ 0:95c75e76d11b
LLVM 3.4
author | Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> |
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date | Thu, 12 Dec 2013 13:56:28 +0900 |
parents | |
children | afa8332a0e37 |
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; RUN: llc < %s -mcpu=atom -mtriple=i686-linux | FileCheck %s ; CHECK: addl ; CHECK-NEXT:leal ; CHECK-NEXT:decl ; CHECK-NEXT:jne ; Test for the FixupLEAs pre-emit pass. An LEA should be substituted for the ADD ; that increments the array pointer because it is within 5 instructions of the ; corresponding load. The ADD precedes the load by following the loop back edge. ; Original C code ;int test(int n, int * array) ;{ ; int sum = 0; ; for(int i = 0; i < n; i++) ; sum += array[i]; ; return sum; ;} define i32 @test(i32 %n, i32* nocapture %array) { entry: %cmp4 = icmp sgt i32 %n, 0 br i1 %cmp4, label %for.body, label %for.end for.body: %i.06 = phi i32 [ %inc, %for.body ], [ 0, %entry ] %sum.05 = phi i32 [ %add, %for.body ], [ 0, %entry ] %arrayidx = getelementptr inbounds i32* %array, i32 %i.06 %0 = load i32* %arrayidx, align 4 %add = add nsw i32 %0, %sum.05 %inc = add nsw i32 %i.06, 1 %exitcond = icmp eq i32 %inc, %n br i1 %exitcond, label %for.end, label %for.body for.end: %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ] ret i32 %sum.0.lcssa }