Mercurial > hg > Members > tobaru > cbc > CbC_llvm
view test/CodeGen/X86/i128-mul.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 -march=x86-64 -mcpu=corei7 | FileCheck %s ; PR1198 define i64 @foo(i64 %x, i64 %y) { %tmp0 = zext i64 %x to i128 %tmp1 = zext i64 %y to i128 %tmp2 = mul i128 %tmp0, %tmp1 %tmp7 = zext i32 64 to i128 %tmp3 = lshr i128 %tmp2, %tmp7 %tmp4 = trunc i128 %tmp3 to i64 ret i64 %tmp4 } ; <rdar://problem/14096009> superfluous multiply by high part of ; zero-extended value. ; CHECK: @mul1 ; CHECK-NOT: imulq ; CHECK: mulq ; CHECK-NOT: imulq define i64 @mul1(i64 %n, i64* nocapture %z, i64* nocapture %x, i64 %y) { entry: %conv = zext i64 %y to i128 %cmp11 = icmp eq i64 %n, 0 br i1 %cmp11, label %for.end, label %for.body for.body: ; preds = %entry, %for.body %carry.013 = phi i64 [ %conv6, %for.body ], [ 0, %entry ] %i.012 = phi i64 [ %inc, %for.body ], [ 0, %entry ] %arrayidx = getelementptr inbounds i64* %x, i64 %i.012 %0 = load i64* %arrayidx, align 8 %conv2 = zext i64 %0 to i128 %mul = mul i128 %conv2, %conv %conv3 = zext i64 %carry.013 to i128 %add = add i128 %mul, %conv3 %conv4 = trunc i128 %add to i64 %arrayidx5 = getelementptr inbounds i64* %z, i64 %i.012 store i64 %conv4, i64* %arrayidx5, align 8 %shr = lshr i128 %add, 64 %conv6 = trunc i128 %shr to i64 %inc = add i64 %i.012, 1 %exitcond = icmp eq i64 %inc, %n br i1 %exitcond, label %for.end, label %for.body for.end: ; preds = %for.body, %entry ret i64 0 }