test/Transforms/InstCombine/statepoint-iter.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes='instcombine<max-iterations=1>' -S | FileCheck %s
; These tests check the optimizations specific to
; pointers being relocated at a statepoint.


declare void @func()

define i1 @test_null(i1 %cond) gc "statepoint-example" {
; CHECK-LABEL: @test_null(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[COND:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK:       right:
; CHECK-NEXT:    br label [[MERGE:%.*]]
; CHECK:       left:
; CHECK-NEXT:    [[SAFEPOINT_TOKEN:%.*]] = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr nonnull elementtype(void ()) @func, i32 0, i32 0, i32 0, i32 0) [ "gc-live"() ]
; CHECK-NEXT:    br label [[MERGE]]
; CHECK:       merge:
; CHECK-NEXT:    [[SAFEPOINT_TOKEN2:%.*]] = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr nonnull elementtype(void ()) @func, i32 0, i32 0, i32 0, i32 0) [ "gc-live"() ]
; CHECK-NEXT:    ret i1 true
;
entry:
  br i1 %cond, label %left, label %right

right:
  br label %merge

left:
  %safepoint_token = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(void ()) @func, i32 0, i32 0, i32 0, i32 0) ["gc-live" (ptr addrspace(1) null)]
  %pnew = call ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %safepoint_token,  i32 0, i32 0)
  br label %merge

merge:
  %pnew_phi = phi ptr addrspace(1) [null, %right], [%pnew, %left]
  %safepoint_token2 = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(void ()) @func, i32 0, i32 0, i32 0, i32 0) ["gc-live" (ptr addrspace(1) %pnew_phi)]
  %pnew2 = call ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %safepoint_token2,  i32 0, i32 0)
  %cmp = icmp eq ptr addrspace(1) %pnew2, null
  ret i1 %cmp
}

define ptr addrspace(1) @test_undef(i1 %cond) gc "statepoint-example" {
; CHECK-LABEL: @test_undef(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[COND:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK:       right:
; CHECK-NEXT:    br label [[MERGE:%.*]]
; CHECK:       left:
; CHECK-NEXT:    [[SAFEPOINT_TOKEN:%.*]] = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr nonnull elementtype(void ()) @func, i32 0, i32 0, i32 0, i32 0) [ "gc-live"() ]
; CHECK-NEXT:    br label [[MERGE]]
; CHECK:       merge:
; CHECK-NEXT:    [[SAFEPOINT_TOKEN2:%.*]] = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr nonnull elementtype(void ()) @func, i32 0, i32 0, i32 0, i32 0) [ "gc-live"() ]
; CHECK-NEXT:    ret ptr addrspace(1) undef
;
entry:
  br i1 %cond, label %left, label %right

right:
  br label %merge

left:
  %safepoint_token = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(void ()) @func, i32 0, i32 0, i32 0, i32 0) ["gc-live" (ptr addrspace(1) undef)]
  %pnew = call ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %safepoint_token,  i32 0, i32 0)
  br label %merge

merge:
  %pnew_phi = phi ptr addrspace(1) [undef, %right], [%pnew, %left]
  %safepoint_token2 = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(void ()) @func, i32 0, i32 0, i32 0, i32 0) ["gc-live" (ptr addrspace(1) %pnew_phi)]
  %pnew2 = call ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %safepoint_token2,  i32 0, i32 0)
  ret ptr addrspace(1) %pnew2
}

declare token @llvm.experimental.gc.statepoint.p0(i64, i32, ptr, i32, i32, ...)
declare ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token, i32, i32)