mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2025-01-31 20:51:52 +01:00
28906b740e
Summary: Some optimizations in AddReachableCodeToWorklist did not update the MadeIRChange state. This could happen both when removing trivially dead instructions (DCE) and at constant folds. It is essential that changes to the IR is reported correctly, since for example InstCombinePass::run() will indicate that all analyses are preserved otherwise. And the CGPassManager determines if the CallGraph is up-to-date based on status from InstructionCombiningPass::runOnFunction(). The new test case early_dce_clobbers_callgraph.ll is a reproducer for some asserts that started to trigger after changes in the inliner in r305245. With this patch the test case passes again. Reviewers: sanjoy, craig.topper, dblaikie Reviewed By: craig.topper Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D34346 llvm-svn: 305725
21 lines
652 B
LLVM
21 lines
652 B
LLVM
; This run line verifies that we get the expected constant fold.
|
|
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
; This run line verifies that InstructionCombiningPass::runOnFunction reports
|
|
; this as a modification of the IR.
|
|
; RUN: opt < %s -instcombine -disable-output -debug-pass=Details 2>&1 | FileCheck %s --check-prefix=DETAILS
|
|
|
|
define i32 @foo(i32 %arg) #0 {
|
|
; CHECK-LABEL: @foo(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[AND:%.*]] = and i32 [[ARG:%.*]], 7
|
|
; CHECK-NEXT: ret i32 [[AND]]
|
|
;
|
|
entry:
|
|
%or = or i32 0, 7
|
|
%and = and i32 %arg, %or
|
|
ret i32 %and
|
|
}
|
|
|
|
; DETAILS: Made Modification 'Combine redundant instructions' on Function 'foo'
|