llvm-mirror/test/Transforms/InstSimplify/assume.ll

; NOTE: Assertions have been autogenerated by update_test_checks.py
; RUN: opt -instsimplify -S < %s | FileCheck %s

define void @test1() {
; CHECK-LABEL: @test1(
; CHECK:         ret void
;
  call void @llvm.assume(i1 1)
  ret void

}

declare void @llvm.assume(i1) nounwind
[InstSimplify] regenerate checks using a script I didn't notice any significant changes in the actual checks here; all of these tests already used FileCheck, so a script can batch update them in one shot. This commit is just to show the value of automating this process: We have uniform formatting as opposed to a mish-mash of check structure that changes based on individual prefs and the current fashion. This makes it simpler to update when we find a bug or make an enhancement. llvm-svn: 264457 2016-03-25 21:12:25 +01:00			`; NOTE: Assertions have been autogenerated by update_test_checks.py`
Add @llvm.assume, lowering, and some basic properties This is the first commit in a series that add an @llvm.assume intrinsic which can be used to provide the optimizer with a condition it may assume to be true (when the control flow would hit the intrinsic call). Some basic properties are added here: - llvm.invariant(true) is dead. - llvm.invariant(false) is unreachable (this directly corresponds to the documented behavior of MSVC's __assume(0)), so is llvm.invariant(undef). The intrinsic is tagged as writing arbitrarily, in order to maintain control dependencies. BasicAA has been updated, however, to return NoModRef for any particular location-based query so that we don't unnecessarily block code motion. llvm-svn: 213973 2014-07-25 23:13:35 +02:00			`; RUN: opt -instsimplify -S < %s \| FileCheck %s`

			`define void @test1() {`
[InstSimplify] regenerate checks using a script I didn't notice any significant changes in the actual checks here; all of these tests already used FileCheck, so a script can batch update them in one shot. This commit is just to show the value of automating this process: We have uniform formatting as opposed to a mish-mash of check structure that changes based on individual prefs and the current fashion. This makes it simpler to update when we find a bug or make an enhancement. llvm-svn: 264457 2016-03-25 21:12:25 +01:00			`; CHECK-LABEL: @test1(`
			`; CHECK: ret void`
			`;`
Add @llvm.assume, lowering, and some basic properties This is the first commit in a series that add an @llvm.assume intrinsic which can be used to provide the optimizer with a condition it may assume to be true (when the control flow would hit the intrinsic call). Some basic properties are added here: - llvm.invariant(true) is dead. - llvm.invariant(false) is unreachable (this directly corresponds to the documented behavior of MSVC's __assume(0)), so is llvm.invariant(undef). The intrinsic is tagged as writing arbitrarily, in order to maintain control dependencies. BasicAA has been updated, however, to return NoModRef for any particular location-based query so that we don't unnecessarily block code motion. llvm-svn: 213973 2014-07-25 23:13:35 +02:00			`call void @llvm.assume(i1 1)`
			`ret void`

			`}`

			`declare void @llvm.assume(i1) nounwind`