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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes="separate-const-offset-from-gep<lower-gep>" < %s | FileCheck %s
; Check that GEP with an index 'A - B + [ConstantInt]' will be split into two
; GEPs. eg.
; %A = ...
; %B = ...
; %sub = %A - %B
; %idx = %sub + 10
; %gep = getelementptr int, ptr %p, %idx
; will be transformed into:
; %A = ...
; %B = ...
; %sub = %A - %B
; %gep_base = getelementptr int, ptr %p, %sub
; %gep = getelementptr int, ptr %gep_base, 10
define void @test_A_sub_B_add_ConstantInt(ptr %p) {
; CHECK-LABEL: @test_A_sub_B_add_ConstantInt(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @foo()
; CHECK-NEXT: [[REM:%.*]] = srem i32 [[TMP0]], 5
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[K:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[COND_END:%.*]] ]
; CHECK-NEXT: [[MUL:%.*]] = mul nuw nsw i32 [[K]], 5
; CHECK-NEXT: [[SUB1:%.*]] = sub nsw i32 [[MUL]], [[REM]]
; CHECK-NEXT: [[CMP26:%.*]] = icmp ult i32 [[SUB1]], 512
; CHECK-NEXT: br i1 [[CMP26]], label [[COND_TRUE:%.*]], label [[COND_END]]
; CHECK: cond.true:
; CHECK-NEXT: [[TMP1:%.*]] = sext i32 [[MUL]] to i64
; CHECK-NEXT: [[TMP2:%.*]] = sext i32 [[REM]] to i64
; CHECK-NEXT: [[SUB22:%.*]] = sub i64 [[TMP2]], [[TMP1]]
; CHECK-NEXT: [[TMP3:%.*]] = ptrtoint ptr [[P:%.*]] to i64
; CHECK-NEXT: [[TMP4:%.*]] = shl i64 [[SUB22]], 2
; CHECK-NEXT: [[TMP5:%.*]] = add i64 [[TMP3]], [[TMP4]]
; CHECK-NEXT: [[TMP6:%.*]] = add i64 [[TMP5]], 2044
; CHECK-NEXT: [[TMP7:%.*]] = inttoptr i64 [[TMP6]] to ptr
; CHECK-NEXT: store float 1.000000e+00, ptr [[TMP7]], align 4
; CHECK-NEXT: br label [[COND_END]]
; CHECK: cond.end:
; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[K]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i32 [[INC]], 100
; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_END:%.*]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
%0 = tail call i32 @foo()
%rem = srem i32 %0, 5
%add = add nsw i32 %rem , 511
br label %for.body
for.body:
%k = phi i32 [ 0, %entry ], [ %inc, %cond.end ]
%mul = mul nuw nsw i32 %k, 5
%sub1 = sub nsw i32 %mul, %rem
%cmp26 = icmp ult i32 %sub1, 512
br i1 %cmp26, label %cond.true, label %cond.end
cond.true:
%sub2 = sub nsw i32 %add, %mul
%idxprom = sext i32 %sub2 to i64
%arryidx = getelementptr inbounds float, ptr %p, i64 %idxprom
store float 1.0, ptr %arryidx, align 4
br label %cond.end
cond.end:
%inc = add nuw nsw i32 %k, 1
%exitcond = icmp ne i32 %inc, 100
br i1 %exitcond, label %for.body, label %for.end
for.end:
ret void
}
declare i32 @foo()
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