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; RUN: opt -passes='loop-mssa(simple-loop-unswitch<nontrivial>),verify<loops>' -verify-dom-info -verify-memoryssa -S %s | FileCheck %s
; RUN: opt -passes='loop-mssa(simple-loop-unswitch<nontrivial>),verify<loops>' -memssa-check-limit=3 -verify-dom-info -verify-memoryssa -S %s | FileCheck %s
declare void @clobber()
; Check that MemorySSA updating can deal with a clobbering access of a
; duplicated load being a MemoryPHI outside the loop.
define void @partial_unswitch_memssa_update(ptr noalias %ptr, i1 %c) {
; CHECK-LABEL: @partial_unswitch_memssa_update(
; CHECK-LABEL: loop.ph:
; CHECK-NEXT: [[LV:%[a-z0-9]+]] = load i32, ptr %ptr, align 4
; CHECK-NEXT: [[C:%[a-z0-9]+]] = icmp eq i32 [[LV]], 0
; CHECK-NEXT: br i1 [[C]]
entry:
br i1 %c, label %loop.ph, label %outside.clobber
outside.clobber:
call void @clobber()
br label %loop.ph
loop.ph:
br label %loop.header
loop.header:
%lv = load i32, ptr %ptr, align 4
%hc = icmp eq i32 %lv, 0
br i1 %hc, label %if, label %then
if:
br label %loop.latch
then:
br label %loop.latch
loop.latch:
br i1 true, label %loop.header, label %exit
exit:
ret void
}
; Check that MemorySSA updating can deal with skipping defining accesses in the
; loop body until it finds the first defining access outside the loop.
define void @partial_unswitch_inloop_stores_beteween_outside_defining_access(ptr noalias %ptr, ptr noalias %src) {
; CHECK-LABEL: @partial_unswitch_inloop_stores_beteween_outside_defining_access
; CHECK-LABEL: entry:
; CHECK-NEXT: store i64 0, ptr %ptr, align 1
; CHECK-NEXT: store i64 1, ptr %ptr, align 1
; CHECK-NEXT: [[LV:%[a-z0-9]+]] = load i16, ptr %src, align 1
; CHECK-NEXT: [[C:%[a-z0-9]+]] = icmp eq i16 [[LV]], 0
; CHECK-NEXT: br i1 [[C]]
;
entry:
store i64 0, ptr %ptr, align 1
store i64 1, ptr %ptr, align 1
br label %loop
loop:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ]
store i64 2, ptr %ptr, align 1
%lv = load i16, ptr %src, align 1
%invar.cond = icmp eq i16 %lv, 0
br i1 %invar.cond, label %noclobber, label %loop.latch
noclobber:
br label %loop.latch
loop.latch:
%iv.next = add i32 %iv, 1
%ec = icmp eq i32 %iv, 1000
br i1 %ec, label %exit, label %loop
exit:
ret void
}
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