derek.holloway
7502bf64a4
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95 lines
2.9 KiB
LLVM
95 lines
2.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=instcombine -S < %s | FileCheck %s
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc18.0.0"
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declare i32 @use(ptr)
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; Should be able to sink %ptr load to %not.null block which is the NCD of %ptr users.
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define i32 @test1(ptr %addr, i1 %c) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[PTR:%.*]] = load ptr, ptr [[ADDR:%.*]], align 8
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; CHECK-NEXT: br i1 false, label [[NULL:%.*]], label [[NOT_NULL:%.*]]
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; CHECK: null:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: not.null:
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; CHECK-NEXT: [[Y:%.*]] = call i32 @use(ptr [[PTR]])
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; CHECK-NEXT: br i1 [[C:%.*]], label [[EXIT]], label [[NOT_NULL_2:%.*]]
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; CHECK: not.null.2:
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; CHECK-NEXT: [[Z:%.*]] = call i32 @use(ptr [[PTR]])
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[P:%.*]] = phi i32 [ poison, [[NULL]] ], [ [[Y]], [[NOT_NULL]] ], [ [[Z]], [[NOT_NULL_2]] ]
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; CHECK-NEXT: ret i32 [[P]]
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;
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entry:
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%ptr = load ptr, ptr %addr
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%cond = icmp eq ptr %addr, null
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br i1 %cond, label %null, label %not.null
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null:
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%x = call i32 @use(ptr null)
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br label %exit
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not.null:
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%y = call i32 @use(ptr %ptr)
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br i1 %c, label %exit, label %not.null.2
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not.null.2:
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%z = call i32 @use(ptr %ptr)
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br label %exit
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exit:
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%p = phi i32 [ %x, %null ], [ %y, %not.null ], [ %z, %not.null.2 ]
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ret i32 %p
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}
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; Should be able to sink %ptr load to %not.null block which is the NCD of %ptr users.
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define i32 @test2(ptr %addr, i1 %c) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[COND:%.*]] = icmp eq ptr [[ADDR:%.*]], null
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; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOAD_BB:%.*]]
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; CHECK: load.bb:
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; CHECK-NEXT: [[PTR:%.*]] = load ptr, ptr [[ADDR]], align 8
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; CHECK-NEXT: br i1 [[C:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
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; CHECK: left:
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; CHECK-NEXT: [[X:%.*]] = call i32 @use(ptr null)
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: right:
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; CHECK-NEXT: [[Y:%.*]] = call i32 @use(ptr [[PTR]])
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; CHECK-NEXT: br i1 false, label [[EXIT]], label [[RIGHT_2:%.*]]
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; CHECK: right.2:
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; CHECK-NEXT: [[Z:%.*]] = call i32 @use(ptr [[PTR]])
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[P:%.*]] = phi i32 [ [[X]], [[LEFT]] ], [ poison, [[RIGHT]] ], [ [[Z]], [[RIGHT_2]] ], [ 0, [[ENTRY:%.*]] ]
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; CHECK-NEXT: ret i32 [[P]]
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;
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entry:
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%cond = icmp eq ptr %addr, null
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br i1 %cond, label %exit, label %load.bb
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load.bb:
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%ptr = load ptr, ptr %addr
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br i1 %c, label %left, label %right
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left:
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%x = call i32 @use(ptr null)
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br label %exit
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right:
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%y = call i32 @use(ptr %ptr)
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br i1 %c, label %exit, label %right.2
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right.2:
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%z = call i32 @use(ptr %ptr)
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br label %exit
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exit:
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%p = phi i32 [ %x, %left ], [ %y, %right ], [ %z, %right.2 ], [ 0, %entry ]
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ret i32 %p
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}
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