82 lines
2.9 KiB
LLVM
82 lines
2.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
|
|
; RUN: opt -passes='print<access-info>' -disable-output < %s 2>&1 | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
|
|
|
|
; void vectorizable_Read_Write(int *A) {
|
|
; for (unsigned i = 1022; i >= 0; i--)
|
|
; A[i+1] = A[i] + 1;
|
|
; }
|
|
|
|
define void @vectorizable_Read_Write(ptr nocapture %A) {
|
|
; CHECK-LABEL: 'vectorizable_Read_Write'
|
|
; CHECK-NEXT: loop:
|
|
; CHECK-NEXT: Memory dependences are safe
|
|
; CHECK-NEXT: Dependences:
|
|
; CHECK-NEXT: Forward:
|
|
; CHECK-NEXT: %l = load i32, ptr %gep.A, align 4 ->
|
|
; CHECK-NEXT: store i32 %add, ptr %gep.A.plus.1, align 4
|
|
; CHECK-EMPTY:
|
|
; CHECK-NEXT: Run-time memory checks:
|
|
; CHECK-NEXT: Grouped accesses:
|
|
; CHECK-EMPTY:
|
|
; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.
|
|
; CHECK-NEXT: SCEV assumptions:
|
|
; CHECK-EMPTY:
|
|
; CHECK-NEXT: Expressions re-written:
|
|
;
|
|
entry:
|
|
%A.plus.1 = getelementptr i32, ptr %A, i64 1
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i64 [ 1022, %entry ], [ %iv.next, %loop ]
|
|
%gep.A = getelementptr inbounds i32, ptr %A, i64 %iv
|
|
%l = load i32, ptr %gep.A, align 4
|
|
%add = add nsw i32 %l, 1
|
|
%gep.A.plus.1 = getelementptr i32, ptr %A.plus.1, i64 %iv
|
|
store i32 %add, ptr %gep.A.plus.1, align 4
|
|
%iv.next = add nsw i64 %iv, -1
|
|
%cmp.not = icmp eq i64 %iv, 0
|
|
br i1 %cmp.not, label %exit, label %loop
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
define void @neg_step_ForwardButPreventsForwarding(ptr nocapture %A, ptr noalias %B) {
|
|
; CHECK-LABEL: 'neg_step_ForwardButPreventsForwarding'
|
|
; CHECK-NEXT: loop:
|
|
; CHECK-NEXT: Report: unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
|
|
; CHECK-NEXT: Forward loop carried data dependence that prevents store-to-load forwarding.
|
|
; CHECK-NEXT: Dependences:
|
|
; CHECK-NEXT: ForwardButPreventsForwarding:
|
|
; CHECK-NEXT: store i32 0, ptr %gep.A, align 4 ->
|
|
; CHECK-NEXT: %l = load i32, ptr %gep.A.plus.1, align 4
|
|
; CHECK-EMPTY:
|
|
; CHECK-NEXT: Run-time memory checks:
|
|
; CHECK-NEXT: Grouped accesses:
|
|
; CHECK-EMPTY:
|
|
; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.
|
|
; CHECK-NEXT: SCEV assumptions:
|
|
; CHECK-EMPTY:
|
|
; CHECK-NEXT: Expressions re-written:
|
|
;
|
|
entry:
|
|
%A.plus.1 = getelementptr i32, ptr %A, i64 1
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i64 [ 1022, %entry ], [ %iv.next, %loop ]
|
|
%gep.A = getelementptr inbounds i32, ptr %A, i64 %iv
|
|
store i32 0, ptr %gep.A, align 4
|
|
%gep.A.plus.1 = getelementptr i32, ptr %A.plus.1, i64 %iv
|
|
%l = load i32, ptr %gep.A.plus.1, align 4
|
|
store i32 %l, ptr %B
|
|
%iv.next = add nsw i64 %iv, -1
|
|
%cmp.not = icmp eq i64 %iv, 0
|
|
br i1 %cmp.not, label %exit, label %loop
|
|
|
|
exit:
|
|
ret void
|
|
}
|