derek.holloway
7502bf64a4
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153 lines
4.6 KiB
LLVM
153 lines
4.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -enable-load-pre -enable-scalar-pre -passes=gvn -S < %s | FileCheck %s --check-prefixes=CHECK,MDEP
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; RUN: opt -enable-load-pre -enable-scalar-pre -passes='gvn<memoryssa>' -S < %s | FileCheck %s --check-prefixes=CHECK,MSSA
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declare void @side_effect_0() nofree
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declare void @side_effect_1(i32 %x) nofree
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declare void @no_side_effect() readonly
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; TODO: We can PRE the load into the cold path, removing it from the hot path.
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define i32 @test_01(ptr %p) {
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; CHECK-LABEL: @test_01(
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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: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
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; CHECK-NEXT: [[X:%.*]] = load i32, ptr [[P:%.*]], align 4
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; CHECK-NEXT: [[COND:%.*]] = icmp ult i32 [[X]], 100
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; CHECK-NEXT: br i1 [[COND]], label [[HOT_PATH:%.*]], label [[COLD_PATH:%.*]]
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; CHECK: hot_path:
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: cold_path:
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; CHECK-NEXT: call void @side_effect_0() #[[ATTR0:[0-9]+]]
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: backedge:
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], [[X]]
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
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; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret i32 [[X]]
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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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%iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
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%x = load i32, ptr %p
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%cond = icmp ult i32 %x, 100
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br i1 %cond, label %hot_path, label %cold_path
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hot_path:
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br label %backedge
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cold_path:
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call void @side_effect_0() nofree
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br label %backedge
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backedge:
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%iv.next = add i32 %iv, %x
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%loop.cond = icmp ult i32 %iv.next, 1000
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br i1 %loop.cond, label %loop, label %exit
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exit:
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ret i32 %x
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}
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; TODO: We can PRE the load into the cold path, removing it from the hot path.
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define i32 @test_02(ptr %p) {
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; CHECK-LABEL: @test_02(
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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: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
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; CHECK-NEXT: [[X:%.*]] = load i32, ptr [[P:%.*]], align 4
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; CHECK-NEXT: [[COND:%.*]] = icmp ult i32 [[X]], 100
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; CHECK-NEXT: br i1 [[COND]], label [[HOT_PATH:%.*]], label [[COLD_PATH:%.*]]
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; CHECK: hot_path:
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: cold_path:
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; CHECK-NEXT: call void @side_effect_1(i32 [[X]]) #[[ATTR0]]
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: backedge:
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], [[X]]
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
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; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret i32 [[X]]
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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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%iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
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%x = load i32, ptr %p
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%cond = icmp ult i32 %x, 100
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br i1 %cond, label %hot_path, label %cold_path
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hot_path:
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br label %backedge
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cold_path:
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call void @side_effect_1(i32 %x) nofree
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br label %backedge
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backedge:
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%iv.next = add i32 %iv, %x
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%loop.cond = icmp ult i32 %iv.next, 1000
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br i1 %loop.cond, label %loop, label %exit
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exit:
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ret i32 %x
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}
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define i32 @test_03(ptr %p) {
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; CHECK-LABEL: @test_03(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[X_PRE:%.*]] = load i32, ptr [[P:%.*]], align 4
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
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; CHECK-NEXT: [[COND:%.*]] = icmp ult i32 [[X_PRE]], 100
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; CHECK-NEXT: br i1 [[COND]], label [[HOT_PATH:%.*]], label [[COLD_PATH:%.*]]
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; CHECK: hot_path:
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: cold_path:
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; CHECK-NEXT: call void @no_side_effect()
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: backedge:
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], [[X_PRE]]
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp ult i32 [[IV_NEXT]], 1000
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; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret i32 [[X_PRE]]
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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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%iv = phi i32 [ 0, %entry], [%iv.next, %backedge]
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%x = load i32, ptr %p
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%cond = icmp ult i32 %x, 100
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br i1 %cond, label %hot_path, label %cold_path
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hot_path:
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br label %backedge
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cold_path:
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call void @no_side_effect()
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br label %backedge
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backedge:
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%iv.next = add i32 %iv, %x
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%loop.cond = icmp ult i32 %iv.next, 1000
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br i1 %loop.cond, label %loop, label %exit
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exit:
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ret i32 %x
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}
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;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
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; MDEP: {{.*}}
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; MSSA: {{.*}}
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