Commit 97e06a0d authored by Nikita Popov's avatar Nikita Popov
Browse files

[GVN] Add tests for captured-before analysis (NFC)

parent 3bfd1f09

llvm/test/Transforms/GVN/captured-before.ll

0 → 100644
+80 −0
Original line number Diff line number Diff line 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3

; RUN: opt -S -passes=gvn < %s | FileCheck %s



declare void @capture(ptr)

declare void @some_call()



define i32 @test_call_before_capture(ptr %p) {

; CHECK-LABEL: define i32 @test_call_before_capture(

; CHECK-SAME: ptr [[P:%.*]]) {

; CHECK-NEXT:    [[A:%.*]] = alloca i32, align 4

; CHECK-NEXT:    store i32 123, ptr [[A]], align 4

; CHECK-NEXT:    call void @some_call()

; CHECK-NEXT:    call void @capture(ptr [[A]])

; CHECK-NEXT:    ret i32 123

;

  %a = alloca i32

  store i32 123, ptr %a

  call void @some_call()

  %v = load i32, ptr %a

  call void @capture(ptr %a)

  ret i32 %v

}



define i32 @test_call_after_capture(ptr %p) {

; CHECK-LABEL: define i32 @test_call_after_capture(

; CHECK-SAME: ptr [[P:%.*]]) {

; CHECK-NEXT:    [[A:%.*]] = alloca i32, align 4

; CHECK-NEXT:    store i32 123, ptr [[A]], align 4

; CHECK-NEXT:    call void @capture(ptr [[A]])

; CHECK-NEXT:    call void @some_call()

; CHECK-NEXT:    [[V:%.*]] = load i32, ptr [[A]], align 4

; CHECK-NEXT:    ret i32 [[V]]

;

  %a = alloca i32

  store i32 123, ptr %a

  call void @capture(ptr %a)

  call void @some_call()

  %v = load i32, ptr %a

  ret i32 %v

}



define i32 @test_store_before_capture(ptr %p) {

; CHECK-LABEL: define i32 @test_store_before_capture(

; CHECK-SAME: ptr [[P:%.*]]) {

; CHECK-NEXT:    [[A:%.*]] = alloca i32, align 4

; CHECK-NEXT:    store i32 123, ptr [[A]], align 4

; CHECK-NEXT:    [[P2:%.*]] = load ptr, ptr [[P]], align 8

; CHECK-NEXT:    store i32 42, ptr [[P2]], align 4

; CHECK-NEXT:    [[V:%.*]] = load i32, ptr [[A]], align 4

; CHECK-NEXT:    call void @capture(ptr [[A]])

; CHECK-NEXT:    ret i32 [[V]]

;

  %a = alloca i32

  store i32 123, ptr %a

  %p2 = load ptr, ptr %p

  store i32 42, ptr %p2

  %v = load i32, ptr %a

  call void @capture(ptr %a)

  ret i32 %v

}



define i32 @test_store_after_capture(ptr %p) {

; CHECK-LABEL: define i32 @test_store_after_capture(

; CHECK-SAME: ptr [[P:%.*]]) {

; CHECK-NEXT:    [[A:%.*]] = alloca i32, align 4

; CHECK-NEXT:    store i32 123, ptr [[A]], align 4

; CHECK-NEXT:    call void @capture(ptr [[A]])

; CHECK-NEXT:    [[P2:%.*]] = load ptr, ptr [[P]], align 8

; CHECK-NEXT:    store i32 42, ptr [[P2]], align 4

; CHECK-NEXT:    [[V:%.*]] = load i32, ptr [[A]], align 4

; CHECK-NEXT:    ret i32 [[V]]

;

  %a = alloca i32

  store i32 123, ptr %a

  call void @capture(ptr %a)

  %p2 = load ptr, ptr %p

  store i32 42, ptr %p2

  %v = load i32, ptr %a

  ret i32 %v

}