135 lines
4.6 KiB
LLVM
135 lines
4.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -licm < %s -S | FileCheck %s
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; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop-mssa(licm)' < %s -S | FileCheck %s
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define void @test1(i1 %cond, ptr %ptr) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = call ptr @llvm.invariant.start.p0(i64 4, ptr [[PTR:%.*]])
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; CHECK-NEXT: [[VAL:%.*]] = load i32, ptr [[PTR]], align 4
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]
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; CHECK-NEXT: br label [[LOOP]]
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;
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entry:
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br label %loop
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loop:
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%x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]
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call ptr @llvm.invariant.start.p0(i64 4, ptr %ptr)
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%val = load i32, ptr %ptr
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%x.inc = add i32 %x, %val
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br label %loop
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}
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;; despite the loop varying invariant.start, we should be
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;; able to hoist the load
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define void @test2(i1 %cond, ptr %ptr) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[VAL:%.*]] = load i32, ptr [[PTR:%.*]], align 4
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[PIV:%.*]] = getelementptr i32, ptr [[PTR]], i32 [[X]]
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; CHECK-NEXT: [[TMP0:%.*]] = call ptr @llvm.invariant.start.p0(i64 4, ptr [[PIV]])
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; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]
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; CHECK-NEXT: br label [[LOOP]]
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;
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entry:
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br label %loop
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loop:
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%x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]
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%piv = getelementptr i32, ptr %ptr, i32 %x
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call ptr @llvm.invariant.start.p0(i64 4, ptr %piv)
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%val = load i32, ptr %ptr
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%x.inc = add i32 %x, %val
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br label %loop
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}
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define void @test3(i1 %cond, ptr %ptr) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = call ptr @llvm.invariant.start.p0(i64 4, ptr [[PTR:%.*]])
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; CHECK-NEXT: [[VAL:%.*]] = load i32, ptr [[PTR]], align 4
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; CHECK-NEXT: [[P2:%.*]] = getelementptr i32, ptr [[PTR]], i32 1
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]
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; CHECK-NEXT: store volatile i32 0, ptr [[P2]], align 4
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; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]
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; CHECK-NEXT: br label [[LOOP]]
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;
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entry:
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br label %loop
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loop:
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%x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]
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call ptr @llvm.invariant.start.p0(i64 4, ptr %ptr)
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%val = load i32, ptr %ptr
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%p2 = getelementptr i32, ptr %ptr, i32 1
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store volatile i32 0, ptr %p2
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%x.inc = add i32 %x, %val
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br label %loop
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}
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; can't hoist due to init in loop, only well defined if loop exits
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; on first iteration, but we don't bother checking for that currently
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define void @test4(i1 %cond, ptr %ptr) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]
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; CHECK-NEXT: store i32 0, ptr [[PTR:%.*]], align 4
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; CHECK-NEXT: [[TMP0:%.*]] = call ptr @llvm.invariant.start.p0(i64 4, ptr [[PTR]])
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; CHECK-NEXT: [[VAL:%.*]] = load i32, ptr [[PTR]], align 4
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; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]
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; CHECK-NEXT: br label [[LOOP]]
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;
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entry:
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br label %loop
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loop:
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%x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]
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store i32 0, ptr %ptr
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call ptr @llvm.invariant.start.p0(i64 4, ptr %ptr)
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%val = load i32, ptr %ptr
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%x.inc = add i32 %x, %val
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br label %loop
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}
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; don't try to reason about scopes
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define void @test5(i1 %cond, ptr %ptr) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]
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; CHECK-NEXT: store i32 0, ptr [[PTR:%.*]], align 4
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; CHECK-NEXT: [[SCOPE:%.*]] = call ptr @llvm.invariant.start.p0(i64 4, ptr [[PTR]])
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; CHECK-NEXT: [[VAL:%.*]] = load i32, ptr [[PTR]], align 4
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; CHECK-NEXT: call void @llvm.invariant.end.p0(ptr [[SCOPE]], i64 4, ptr [[PTR]])
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; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]
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; CHECK-NEXT: br label [[LOOP]]
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;
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entry:
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br label %loop
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loop:
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%x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]
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store i32 0, ptr %ptr
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%scope = call ptr @llvm.invariant.start.p0(i64 4, ptr %ptr)
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%val = load i32, ptr %ptr
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call void @llvm.invariant.end.p0(ptr %scope, i64 4, ptr %ptr)
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%x.inc = add i32 %x, %val
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br label %loop
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}
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declare ptr @llvm.invariant.start.p0(i64, ptr)
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declare void @llvm.invariant.end.p0(ptr, i64, ptr)
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