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llvm-project/llvm/test/Transforms/SimplifyCFG/unprofitable-pr.ll

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -simplifycfg -simplifycfg-max-small-block-size=10 -S < %s | FileCheck %s
; RUN: opt -passes=simplify-cfg -simplifycfg-max-small-block-size=10 -S < %s | FileCheck %s
target datalayout = "e-p:64:64-p5:32:32-A5"
declare void @llvm.assume(i1)
define void @test_01(i1 %c, i64* align 1 %ptr) local_unnamed_addr #0 {
; CHECK-LABEL: @test_01(
; CHECK-NEXT: br i1 [[C:%.*]], label [[TRUE2_CRITEDGE:%.*]], label [[FALSE1:%.*]]
; CHECK: false1:
; CHECK-NEXT: store volatile i64 1, i64* [[PTR:%.*]], align 4
; CHECK-NEXT: [[PTRINT:%.*]] = ptrtoint i64* [[PTR]] to i64
; CHECK-NEXT: [[MASKEDPTR:%.*]] = and i64 [[PTRINT]], 7
; CHECK-NEXT: [[MASKCOND:%.*]] = icmp eq i64 [[MASKEDPTR]], 0
; CHECK-NEXT: tail call void @llvm.assume(i1 [[MASKCOND]])
; CHECK-NEXT: store volatile i64 0, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 3, i64* [[PTR]], align 8
; CHECK-NEXT: ret void
; CHECK: true2.critedge:
; CHECK-NEXT: [[PTRINT_C:%.*]] = ptrtoint i64* [[PTR]] to i64
; CHECK-NEXT: [[MASKEDPTR_C:%.*]] = and i64 [[PTRINT_C]], 7
; CHECK-NEXT: [[MASKCOND_C:%.*]] = icmp eq i64 [[MASKEDPTR_C]], 0
; CHECK-NEXT: tail call void @llvm.assume(i1 [[MASKCOND_C]])
; CHECK-NEXT: store volatile i64 0, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 2, i64* [[PTR]], align 8
; CHECK-NEXT: ret void
;
br i1 %c, label %true1, label %false1
true1: ; preds = %false1, %0
%ptrint = ptrtoint i64* %ptr to i64
%maskedptr = and i64 %ptrint, 7
%maskcond = icmp eq i64 %maskedptr, 0
tail call void @llvm.assume(i1 %maskcond)
store volatile i64 0, i64* %ptr, align 8
br i1 %c, label %true2, label %false2
false1: ; preds = %0
store volatile i64 1, i64* %ptr, align 4
br label %true1
true2: ; preds = %true1
store volatile i64 2, i64* %ptr, align 8
ret void
false2: ; preds = %true1
store volatile i64 3, i64* %ptr, align 8
ret void
}
; Corner case: the block has max possible size for which we still do PRE.
define void @test_02(i1 %c, i64* align 1 %ptr) local_unnamed_addr #0 {
; CHECK-LABEL: @test_02(
; CHECK-NEXT: br i1 [[C:%.*]], label [[TRUE2_CRITEDGE:%.*]], label [[FALSE1:%.*]]
; CHECK: false1:
; CHECK-NEXT: store volatile i64 1, i64* [[PTR:%.*]], align 4
; CHECK-NEXT: [[PTRINT:%.*]] = ptrtoint i64* [[PTR]] to i64
; CHECK-NEXT: [[MASKEDPTR:%.*]] = and i64 [[PTRINT]], 7
; CHECK-NEXT: [[MASKCOND:%.*]] = icmp eq i64 [[MASKEDPTR]], 0
; CHECK-NEXT: tail call void @llvm.assume(i1 [[MASKCOND]])
; CHECK-NEXT: store volatile i64 0, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 3, i64* [[PTR]], align 8
; CHECK-NEXT: ret void
; CHECK: true2.critedge:
; CHECK-NEXT: [[PTRINT_C:%.*]] = ptrtoint i64* [[PTR]] to i64
; CHECK-NEXT: [[MASKEDPTR_C:%.*]] = and i64 [[PTRINT_C]], 7
; CHECK-NEXT: [[MASKCOND_C:%.*]] = icmp eq i64 [[MASKEDPTR_C]], 0
; CHECK-NEXT: tail call void @llvm.assume(i1 [[MASKCOND_C]])
; CHECK-NEXT: store volatile i64 0, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 2, i64* [[PTR]], align 8
; CHECK-NEXT: ret void
;
br i1 %c, label %true1, label %false1
true1: ; preds = %false1, %0
%ptrint = ptrtoint i64* %ptr to i64
%maskedptr = and i64 %ptrint, 7
%maskcond = icmp eq i64 %maskedptr, 0
tail call void @llvm.assume(i1 %maskcond)
store volatile i64 0, i64* %ptr, align 8
store volatile i64 -1, i64* %ptr, align 8
store volatile i64 -1, i64* %ptr, align 8
store volatile i64 -1, i64* %ptr, align 8
store volatile i64 -1, i64* %ptr, align 8
store volatile i64 -1, i64* %ptr, align 8
br i1 %c, label %true2, label %false2
false1: ; preds = %0
store volatile i64 1, i64* %ptr, align 4
br label %true1
true2: ; preds = %true1
store volatile i64 2, i64* %ptr, align 8
ret void
false2: ; preds = %true1
store volatile i64 3, i64* %ptr, align 8
ret void
}
; This block is too huge for PRE.
define void @test_03(i1 %c, i64* align 1 %ptr) local_unnamed_addr #0 {
; CHECK-LABEL: @test_03(
; CHECK-NEXT: br i1 [[C:%.*]], label [[TRUE1:%.*]], label [[FALSE1:%.*]]
; CHECK: true1:
; CHECK-NEXT: [[PTRINT:%.*]] = ptrtoint i64* [[PTR:%.*]] to i64
; CHECK-NEXT: [[MASKEDPTR:%.*]] = and i64 [[PTRINT]], 7
; CHECK-NEXT: [[MASKCOND:%.*]] = icmp eq i64 [[MASKEDPTR]], 0
; CHECK-NEXT: tail call void @llvm.assume(i1 [[MASKCOND]])
; CHECK-NEXT: store volatile i64 0, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: store volatile i64 -1, i64* [[PTR]], align 8
; CHECK-NEXT: br i1 [[C]], label [[TRUE2:%.*]], label [[FALSE2:%.*]]
; CHECK: false1:
; CHECK-NEXT: store volatile i64 1, i64* [[PTR]], align 4
; CHECK-NEXT: br label [[TRUE1]]
; CHECK: true2:
; CHECK-NEXT: store volatile i64 2, i64* [[PTR]], align 8
; CHECK-NEXT: ret void
; CHECK: false2:
; CHECK-NEXT: store volatile i64 3, i64* [[PTR]], align 8
; CHECK-NEXT: ret void
;
br i1 %c, label %true1, label %false1
true1: ; preds = %false1, %0
%ptrint = ptrtoint i64* %ptr to i64
%maskedptr = and i64 %ptrint, 7
%maskcond = icmp eq i64 %maskedptr, 0
tail call void @llvm.assume(i1 %maskcond)
store volatile i64 0, i64* %ptr, align 8
store volatile i64 -1, i64* %ptr, align 8
store volatile i64 -1, i64* %ptr, align 8
store volatile i64 -1, i64* %ptr, align 8
store volatile i64 -1, i64* %ptr, align 8
store volatile i64 -1, i64* %ptr, align 8
store volatile i64 -1, i64* %ptr, align 8
br i1 %c, label %true2, label %false2
false1: ; preds = %0
store volatile i64 1, i64* %ptr, align 4
br label %true1
true2: ; preds = %true1
store volatile i64 2, i64* %ptr, align 8
ret void
false2: ; preds = %true1
store volatile i64 3, i64* %ptr, align 8
ret void
}
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