forked from OSchip/llvm-project
76 lines
2.8 KiB
LLVM
76 lines
2.8 KiB
LLVM
|
; 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
|
||
|
|
}
|
||
|
|
|