Mercurial > hg > CbC > CbC_llvm
diff test/Analysis/BasicAA/phi-loop.ll @ 95:afa8332a0e37 LLVM3.8
LLVM 3.8
author | Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> |
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date | Tue, 13 Oct 2015 17:48:58 +0900 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/Analysis/BasicAA/phi-loop.ll Tue Oct 13 17:48:58 2015 +0900 @@ -0,0 +1,75 @@ +; RUN: opt < %s -basicaa -basicaa-recphi=1 -gvn -S | FileCheck %s +; +; Check that section->word_ofs doesn't get reloaded in every iteration of the +; for loop. +; +; Code: +; +; typedef struct { +; unsigned num_words; +; unsigned word_ofs; +; const unsigned *data; +; } section_t; +; +; +; void test2(const section_t * restrict section, unsigned * restrict dst) {; +; while (section->data != NULL) { +; const unsigned *src = section->data; +; for (unsigned i=0; i < section->num_words; ++i) { +; dst[section->word_ofs + i] = src[i]; +; } +; +; ++section; +; } +; } +; + +; CHECK-LABEL: for.body: +; CHECK-NOT: load i32, i32* %word_ofs + +%struct.section_t = type { i32, i32, i32* } + +define void @test2(%struct.section_t* noalias nocapture readonly %section, i32* noalias nocapture %dst) { +entry: + %data13 = getelementptr inbounds %struct.section_t, %struct.section_t* %section, i32 0, i32 2 + %0 = load i32*, i32** %data13, align 4 + %cmp14 = icmp eq i32* %0, null + br i1 %cmp14, label %while.end, label %for.cond.preheader + +for.cond.preheader: ; preds = %entry, %for.end + %1 = phi i32* [ %6, %for.end ], [ %0, %entry ] + %section.addr.015 = phi %struct.section_t* [ %incdec.ptr, %for.end ], [ %section, %entry ] + %num_words = getelementptr inbounds %struct.section_t, %struct.section_t* %section.addr.015, i32 0, i32 0 + %2 = load i32, i32* %num_words, align 4 + %cmp211 = icmp eq i32 %2, 0 + br i1 %cmp211, label %for.end, label %for.body.lr.ph + +for.body.lr.ph: ; preds = %for.cond.preheader + %word_ofs = getelementptr inbounds %struct.section_t, %struct.section_t* %section.addr.015, i32 0, i32 1 + br label %for.body + +for.body: ; preds = %for.body.lr.ph, %for.body + %arrayidx.phi = phi i32* [ %1, %for.body.lr.ph ], [ %arrayidx.inc, %for.body ] + %i.012 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ] + %3 = load i32, i32* %arrayidx.phi, align 4 + %4 = load i32, i32* %word_ofs, align 4 + %add = add i32 %4, %i.012 + %arrayidx3 = getelementptr inbounds i32, i32* %dst, i32 %add + store i32 %3, i32* %arrayidx3, align 4 + %inc = add i32 %i.012, 1 + %5 = load i32, i32* %num_words, align 4 + %cmp2 = icmp ult i32 %inc, %5 + %arrayidx.inc = getelementptr i32, i32* %arrayidx.phi, i32 1 + br i1 %cmp2, label %for.body, label %for.end + +for.end: ; preds = %for.body, %for.cond.preheader + %incdec.ptr = getelementptr inbounds %struct.section_t, %struct.section_t* %section.addr.015, i32 1 + %data = getelementptr inbounds %struct.section_t, %struct.section_t* %section.addr.015, i32 1, i32 2 + %6 = load i32*, i32** %data, align 4 + %cmp = icmp eq i32* %6, null + br i1 %cmp, label %while.end, label %for.cond.preheader + +while.end: ; preds = %for.end, %entry + ret void +} +