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