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[PowerPC][NFC] add testcase for update-form preparation with non-const increment

This commit is contained in:
Chen Zheng 2021-07-15 02:20:01 +00:00
parent a0e02018be
commit 70788052ac
1 changed files with 61 additions and 0 deletions
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61
llvm/test/CodeGen/PowerPC/loop-instr-prep-non-const-increasement.ll
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@ -76,3 +76,64 @@ for.body: ; preds = %for.body.preheader,
%exitcond.not = icmp eq i32 %inc, %n %exitcond.not = icmp eq i32 %inc, %n
br i1 %exitcond.not, label %for.cond.cleanup, label %for.body br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
} }
; char foo1(char *p, int n, int count) {
; int j = 0;
; char sum = 0;
; for (int i = 0; i < n; i++) {
; sum += *(p + j + 1000);
; j += count;
; }
; return sum;
; }
define zeroext i8 @foo1(i8* %p, i32 signext %n, i32 signext %count) {
; CHECK-LABEL: foo1:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: cmpwi r4, 1
; CHECK-NEXT: blt cr0, .LBB1_4
; CHECK-NEXT: # %bb.1: # %for.body.preheader
; CHECK-NEXT: addi r6, r3, 1000
; CHECK-NEXT: clrldi r3, r4, 32
; CHECK-NEXT: extsw r5, r5
; CHECK-NEXT: li r4, 0
; CHECK-NEXT: mtctr r3
; CHECK-NEXT: li r3, 0
; CHECK-NEXT: .p2align 4
; CHECK-NEXT: .LBB1_2: # %for.body
; CHECK-NEXT: #
; CHECK-NEXT: lbzx r7, r6, r4
; CHECK-NEXT: add r4, r4, r5
; CHECK-NEXT: add r3, r7, r3
; CHECK-NEXT: bdnz .LBB1_2
; CHECK-NEXT: # %bb.3: # %for.cond.cleanup
; CHECK-NEXT: clrldi r3, r3, 56
; CHECK-NEXT: blr
; CHECK-NEXT: .LBB1_4:
; CHECK-NEXT: li r3, 0
; CHECK-NEXT: blr
entry:
%cmp10 = icmp sgt i32 %n, 0
br i1 %cmp10, label %for.body.preheader, label %for.cond.cleanup
for.body.preheader: ; preds = %entry
%0 = sext i32 %count to i64
%add.ptr = getelementptr inbounds i8, i8* %p, i64 1000
br label %for.body
for.cond.cleanup: ; preds = %for.body, %entry
%sum.0.lcssa = phi i8 [ 0, %entry ], [ %add, %for.body ]
ret i8 %sum.0.lcssa
for.body: ; preds = %for.body.preheader, %for.body
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
%i.013 = phi i32 [ 0, %for.body.preheader ], [ %inc, %for.body ]
%sum.012 = phi i8 [ 0, %for.body.preheader ], [ %add, %for.body ]
%add.ptr1 = getelementptr inbounds i8, i8* %add.ptr, i64 %indvars.iv
%1 = load i8, i8* %add.ptr1, align 1
%add = add i8 %1, %sum.012
%indvars.iv.next = add nsw i64 %indvars.iv, %0
%inc = add nuw nsw i32 %i.013, 1
%exitcond.not = icmp eq i32 %inc, %n
br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
}