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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --scrub-attributes
; RUN: opt -passes=attributor -aa-pipeline='basic-aa' -attributor-disable=false -attributor-max-iterations-verify -attributor-max-iterations=3 -S < %s | FileCheck %s
; PR2498
; This test tries to convince CHECK about promoting the load from %A + 2,
; because there is a load of %A in the entry block
define internal i32 @callee(i1 %C, i32* %A) {
; CHECK-LABEL: define {{[^@]+}}@callee
; CHECK-SAME: (i1 [[C:%.*]], i32* noalias nocapture nofree nonnull readonly dereferenceable(4) [[A:%.*]])
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A_0:%.*]] = load i32, i32* null
; CHECK-NEXT: br label [[F:%.*]]
; CHECK: T:
; CHECK-NEXT: unreachable
; CHECK: F:
; CHECK-NEXT: [[A_2:%.*]] = getelementptr i32, i32* null, i32 2
; CHECK-NEXT: [[R:%.*]] = load i32, i32* [[A_2]]
; CHECK-NEXT: ret i32 [[R]]
;
entry:
; Unconditonally load the element at %A
%A.0 = load i32, i32* %A
br i1 %C, label %T, label %F
T:
ret i32 %A.0
F:
; Load the element at offset two from %A. This should not be promoted!
%A.2 = getelementptr i32, i32* %A, i32 2
%R = load i32, i32* %A.2
ret i32 %R
}
define i32 @foo() {
; CHECK-LABEL: define {{[^@]+}}@foo()
; CHECK-NEXT: [[X:%.*]] = call i32 @callee(i1 false, i32* noalias nofree readonly null)
; CHECK-NEXT: ret i32 [[X]]
;
%X = call i32 @callee(i1 false, i32* null) ; <i32> [#uses=1]
ret i32 %X
}
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